Consultancy agreement for Tai Po Water Treatment Works signed(With photo)The Water Supplies Department (WSD) today (June 5) signed a $70 million consultancy agreement with Black & Veatch Hong Kong Limited for the expansion of Tai Po Water Treatment Works and ancillary raw water and fresh water transfer facilities.
The agreement covers consultancy service to increase the capacity of Tai Po Water Treatment Works and the ancillary raw water and fresh water transfer facilities from 250,000 cubic metres to 800,000 cubic metres per day. With the expansion, the WSD will be able to offer more reliable water supply to the territory.
The project will upgrade the existing facilities and construct additional water treatment facilities at Tai Po Water Treatment Works, increase the pumping capacities of the ancillary raw water and fresh water pumping stations, increase the storage capacity of the existing Butterfly Valley Fresh Water Primary Service Reservoir in Kwai Tsing, and lay new fresh water mains in Sham Shui Po and Kowloon City.
The proposed expansion works will be carried out under separate construction contracts with the first one scheduled to begin in early 2010. The other construction contracts will start in early 2011.
About 2,100 jobs in the construction industry will be created by the entire project. The WSD will endeavour to create more jobs in the construction industry in the near future by implementing other waterworks projects.
Ends/Friday, June 5, 2009
Issued at HKT 11:50


River dredging to start in January
MetadataShow full item record
The government will start its dredging project for Cagayan River next month, which will widen the river and prevent heavy floods. Several areas of the region will be prioritized, Environment Secretary Roy A. Cimatu told a news briefing on Thursday.
Cortez, G. M. (2020, December 18 - 19). River dredging to start in January. BusinessWorld, p. S1/10.
- BusinessWorld


Pump Parts: Pump- Hydraulic Intensifier Type
O-Ring for 40k and 60k check valve assemblies - 1-5/16 X 1-1/2 X3/32
Original style Flow check valve o-ring. Simplify tracking parts and reduce rebuild frequency by using the rebuild kit.
Check Valve Repair Kit 40K and 60k
Flow-style check valve repair kit. Everything t...


a)Automatically get input data from different land-based telemetering observation stations as well as web addresses.
b)Automatically calibrate and validate itself based on most recent observations and forecasts.
c)Automatically generate outputs through model run at specified times in a day.
d)Automatically update results to India WRIS and new web portal developed for Ranjit Sagar Dam Project.
e)Design an optimal hydro-meteorological network comprising telemetering digital water level recorders of the radar type and rain gauges in the catchment area draining into River Ravi downstream of Ranjit Sagar Dam .
f)Establish a suitable network of rain gauge, river gauge and automatic weather stations to allow calibration and validation of the results of the inflow forecasting model for the reservoirs.
g)Development and operationalisation of flood inundation forecasting system for the area lying downstream of Ranjit Sagar Dam, Ravi river .


In-line centrifugal pumps with cast iron pump body, AISI 316L stainless steel impeller entirely welded using laser technology. Suitable for handling hot or cold and moderately aggressive liquids.
e-LNEE Close-coupled with special motor shaft extension.
e-LNES With stub shaft and standard IEC motor.
e-LNEES Close-coupled with special motor shaft extension and smart pump control system
- Delivery up to 900m3/hr
- Heads up to 90m
- Power supply three phase
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A new bridge over Brays Bayou has opened as part of a huge project in hopes of reducing the flood risk in southwest Houston.
The bridge runs between the 7800 and 7900 blocks of Buffalo Speedway near North Braeswood. The $9.6 million project included the demolishment of the previous bridge and the construction of a higher, longer, and wider bridge.
This project and its accompanying channel improvements will increase the channel's capacity, which will allow for more floodwaters to flow throughout Brays Bayou.
The replacement is part of the $480 million 'Project Brays' which involved widening 21 miles of the bayou and modifying 32 bridges to reduce the flood risk of more than 15,000 structures.


Hydraulic Tube Pulling Unit is provided with hydraulic aggregate and hydraulic pulling device, connected with a hydraulic hose pack. The Tube Pulling Unit comprises of the combined expanding and pulling cylinder and pulling tools like expanding sleeve, expanding mandrel and distance sleeve. The Tube Pulling Unit is used for pulling tubes out of the expanded area of the tube sheet. Hydraulic Tube Pulling Unit of model TP 79 and TPS 79 can be availed in different specifications to suit specific requirement.
Pioneer Intertrade manufactures Hydraulic Tube Pulling Unit. Pioneer Intertrade offers wide range of pressure vessels, storage tanks, earthmoving equipments, railway wagons, boilers, heat exchangers, thermal and nuclear power plants for varied range of industrial applications.
Hydraulic Tube Pulling Unit - Indian Products Directory


Capillary Pressure Modeling: LYNX creates capillary pressure models based on lithology, porosity, stratigraphy, free water level, and wettability to match log computed water saturations. Upon establishment of the representative capillary pressure model(s), the saturation function endpoints are populated for each simulation layer. Using a capillary pressure model that is consistent with log data provides integrity and ensures consistency of the initial fluid distribution in the simulation model.
Capillary Pressure Modeling - Well Log
Capillary Pressure Modeling - Water Saturation Distribution


Under the investment of Korean led company, the construction of 216 MW Upper Trishuli-1, has already begun.
According to the project, the construction began following a first blast was made on Tuesday to remove rock for the construction of a 246-meter ventilation tunnel. Construction of main entrance tunnel, cable tunnel, main tunnel and other structures has been started.
The Korean company - Doosan Heavy Industries and Construction - has been awarded the contract in engineering, procurement, and construction (EPC) model for the construction of the project.
The Upper Trishuli-1 is the largest hydropower project to be constructed with foreign direct investment and the generated power to be used for domestic consumption.
The total estimated cost of the project is USD 647.3 million (inclusive of construction period interest). Nine international financial institutions have agreed to invest USD 453.2 million in the project. The remaining amount has been raised from equity.
The project will generate 1.53 billion units of energy annually.
Out of the total annual energy generated from the project, 38.75 per cent will be generated in winter and 61.25 per cent in rainy season. The generated energy will be supplied to the national transmission system at the Trishuli-3B substation being constructed by the Nepal Electricity Authority.
The promoter of the project is Nepal Water and Energy Development Company where the Korean government-owned Korea southeast Power Company Limited (KOEN) and the International Finance Cooperation (IFC) under the World Bank Group have invested.
In addition, a maximum of 10 per cent share investment has been ensured for the project affected locals.
Financial management has been made for the project by raising 70 per cent loans and 30 per cent of equity.
The project is considered to be very attractive for the power system of the country as it is close to the Kathmandu load centre and 104 MW of electricity will be generated even in the winter season when there is high demand for electricity.
The construction of the project is targeted to be completed by November 2026
VOL. 16, No. 19, May.26, 2023 (Jestha,12. 2080) Publisher and Editor: Keshab Prasad Poudel Online Register Number: DOI 584/074-75
VOL. 16, No. 18, May.05, 2023 (Baisakh 22. 2080) Publisher and Editor: Keshab Prasad Poudel Online Register Number: DOI 584/074-75
VOL. 16, No. 17, April.21, 2023 (Baisakh 08. 2080) Publisher and Editor: Keshab Prasad Poudel Online Register Number: DOI 584/074-75


Schematic presentation of the different model modules
from measurements or from the DSF. 1D River is either
an existing 1D Mekong River model or new development. 2/3D
Flood is the existing EIA hydrodynamic, salinity, sediment
and water quality model for floodplains. 2/3 River
(+1D) is the new channel model to be developed during the
project. At the first stage the general 2/3D model will be
used instead of the specialized 2/3D River.


Check valve 1/2" IT/IG, plastic disc, stainless steel spring, PN 25
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- Reliable check valve: This 1/2" female/female check valve is equipped with a plastic disc and a stainless steel spring, ideal for reliable applications.
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The 1/2" IT/IG check valve with plastic disc and stainless steel spring is designed for a pressure range of up to PN 25 bar and a temperature range of -10°C to 90°C. Its design allows a large flow, making it ideal for a wide range of applications , where efficient and reliable fluid flow is required. This valve is ideal for industrial and commercial systems that require high flow rate and pressure resistance.This product is manufactured in the European Union.
Material: brass/stainless steel/plastic
Size: 1/2" female/female
Check valve - 1 piece


Maldives Transport and Contracting Company (MTCC) has announced that the installation of precast concrete blocks required for the construction of the quay wall of Sh. Bilehfahi Harbor was completed on September 5.
According to MTCC, the placement of precast concrete blocks required for the quay wall construction of Sh. Bilehfahi Harbor began in July.
The project will include dredging and excavation operations totaling 24,125 cubic meters, the construction of a 376-meter breakwater, a 98-meter quay wall, the installation of a 1,150-square-meter paved area, and the installation of streetlights.
The development of Sh. Bilehfahi Harbor is expected to cost MVR 28.42 million.


The Altamaha River orginates at the confluence of the Ocmulgee River and Oconee River, at the three way county boundary between Montgomery, Jeff Davis, and Wheeler Counties. The Altamaha then flows eastward, and a little southward, for 137 miles to empty into the Atlantic Ocean near Darien, Georgia. Its largest tributary is the Ohoopee River, which joins the Altamaha on the southern border of Tattnall County. The Altamaha River watershed forms the largest freshwater river system east of the Mississippi River. The Altamaha River is Georgia’s largest (though not longest) river.
Altamaha River Partnership Altamaha River Odyssey Altamaha Riverkeeper Altamaha River (New Georgia Encyclopedia) Altamaha River (Georgia River Network) Altamaha River LMER (Land Margin Ecosystem Research) Project (University of Georgia) Altamaha River Bioreserve (SherpaGuide)


In the long-distance and high-drop gravitational water supply systems, the water level difference between the upstream and downstream is large. Thus, it is necessary to ensure energy dissipation and pressure head reduction to reduce the pipeline pressure head. The energy dissipation box is a new type of energy dissipation and pressure head reduction device, which is widely used in the gravitational flow transition systems. At present, there is still a dearth of systematic knowledge about the performance of energy dissipation boxes. In this paper, a relationship between the location of the energy dissipation box and the pressure head amplitude is established, a theoretical optimal location equation of the energy dissipation box is derived, and numerical simulations using an engineering example are carried out for verification. The protective effects of an energy dissipation box placed at the theoretical optimal location and an upstream location are compared. The results indicate that for the same valve action time, the optimal position allows effectively reducing the total volume of energy dissipation box. The oscillation amplitudes of the water level in the box and the pressure head behind the box are markedly reduced. Under the condition that the water level oscillation of the energy dissipation box is almost the same, the optimal location offers better pressure head reduction protection performance than the upstream location.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited


Jane Addams Memorial Tollway (I-90) Reconstruct and Add Lane
As part of this I-90 reconstruction and expansion project team, TranSmart provided civil engineering drainage design services for an eight-mile section (Anthony Road to Harmony Creek). The concept and final drainage designs included: hydrologic and hydraulic modeling; sizing and design of storm sewer and culverts, detention basins, linear stormwater storage elements, and outlet controls; final stormwater management report; obtained the necessary construction permits; and implemented best management practices for soil conservation and pollution control—during and after construction. Additionally, TranSmart provided structural engineering design and construction documents for cast-in-place concrete culverts, headwalls, and end sections for hydraulic elements. TranSmart also developed construction quantity takeoffs and special provisions for the designs. These projects required coordination with multiple agencies, including IDOT, ISTHA, ACOE, IDNR-OWR, and municipalities and villages within the limits of the projects.
Roadway Design - Drainage Studies


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Complete refurbished Skid Mounted Twin Pumping & Cementing Unit HT 400 Pump plunger 4" WP 12500 psi complete refurbish, Certification Hydrostatic Test Report and data package. The Pumping Unit driven with 2 Detroit Diesel engine 420hp with elision transmission complete with control panel and jet automatic mixer, density control and with 2 centrifugal pump with Halliburton data acquisition system including
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Complete new butterfly valve and hammer high pressure valve, complete replace new hydraulic hose and pneumatic hose.
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The difference between check valve and butterfly valve
Jun 30,2022 Posted by Bundor
What is the difference between a check valve and a butterfly valve? The check valve is opened and closed by the force of the medium, and the fluid can only flow in one direction. Butterfly valve is a shut-off valve, opening and closing are carried out by external force, and can be installed in both directions. In addition, the characteristics of check valve and butterfly valve are also different.
Check Valve Features Check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve whose main function is to prevent the backflow of the medium, the reverse rotation of the pump and the driving motor, and the discharge of the container medium. The function of this type of valve is that it only allows the medium to flow in one direction and prevents the flow in the opposite direction. Usually this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the fluid pressure and the self-coincident valve flap of the valve flap act on the valve seat, thereby cutting off the flow. Butterfly valve features Butterfly valve is a kind of valve that uses a disc opening and closing member to reciprocate about 90° to open, close and adjust the fluid channel. advantage: ①Simple structure, small size, light weight, and less consumables, do not use it in large-diameter valves; ② Quick opening and closing, small flow resistance; ③ It can be used for medium with suspended solid particles, and can also be used for powdery and granular media according to the strength of the sealing surface. It can be used for two-way opening and closing and adjustment of ventilation and dust removal pipelines, and is widely used in gas pipelines and waterways of metallurgy, light industry, electric power, and petrochemical systems. shortcoming: ① The flow adjustment range is not large. When the opening reaches 30%, the flow will increase to more than 95%; ②Due to the limitation of structure and sealing material of butterfly valve, it should not be used in high temperature and high pressure piping system. The general working temperature is below 300℃ and below PN40; ③The sealing performance is poorer than that of ball valve and globe valve, so it is used in places where sealing requirements are not very high.


Wickwire is a consulting infrastructure solutions company in Iron River, Michigan, specializing in long range planning, project financing, and construction inspections.
Design, long range planning, and construction administration for municipal water distribution systems, wastewater conveyance systems, and construction inspection. Grant procurement, project financing, and grant administration for infrastructure projects.
- Grant Procurement
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Corde Vertical Multistage Centrifugal Pumps are non-self priming, vertical multistage pumps of inline design, flanged or with victaulic coupling, featuring equally sized suction and discharge ports. The impellers, chambers and pressure casings are produced using stage construction whilst the pump stub and motor shafts of the IEC standard motor are directly close coupled. All pumps are equipped with a cartridge type mechanical seal for easy maintenance.
To ensure product suitability and efficiency, Corde AV, AVI and AVN pumps are available in multiple pump sizes and numbers of stages.
Product tab description
Features and benefits tab description
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Video installation tab description
Catalogue tab description


Close-coupled stainless steel centrifugal pumps (LCS series)
- The pump casing, impeller and shaft shall have material of construction of fabricated AISI 304 sheet metal.
- The Pump shaft sealing will be by mechanical shaft seal of Carbon/SiC/Viton/AISI 316 construction suitable for 10 bar pressure rating and water temperature from 0 to +140 deg. C.
- The pump shall be close coupled with a totally enclosed fan cooled type (TEFC) Induction motor, with F class insulation, S1 duty and IP55 protection, suitable for 3 phase, 415 volts, 50 and 60 Hz power supply.
- The pump shall have back pull out design so as to enable the rotating parts to be removed and serviced without dismantling the suction and discharge pipe work.
Variety & Range
- Flow range: up to 120 m³/h
- Head range: up to 57 metres
- Rating: 1.1 to 22 kW
- Rated speed: 2900 rpm
Civil & Construction
Air Conditioning Systems


Maldives Transport and Contracting Company (MTCC) has provided an update on its S. Hulhudhoo Harbor project.
The fourth shipment of precast concrete blocks required for the construction of quay wall of S. Hulhudhoo Harbor have been delivered to the project site on 21st September 2021. The installation of precast concrete blocks required for the quay wall is currently ongoing, with 56% completion.
The S. Hulhudhoo Harbour project consists of; dredging and excavation operations of 88,623cbm; construction of a 114m breakwater; a 624m revetment; a 742m quay wall; 2,250 sqm of paved area and installation of streetlights.
According to MTCC, the value of the project is MVR 66.3 million.


New Delhi: State-run SAIL announced on Sunday that it has supplied 80 per cent of the steel used for the construction of the Sardar Sarovar Dam Project on the Narmada river that was inaugurated by Prime Minister Narendra Modi.
"The Steel Authority of India Ltd (SAIL) has supplied 80 per cent steel required for construction of the Sardar Sarovar Project inaugurated by Prime Minister Narendra Modi today," a Steel Ministry statement said here.
It supplied around 85,000 tonnes of steel to the Sardar Sarovar Narmada Nigam Ltd (SSNNL) for the entire project, which comprises all the canals throughout Gujarat which are connected to Narmada river and dam, the statement said.
The Sardar Sarovar project is the second largest concrete gravity dam by volume, and has the world's third largest spillway discharging capacity, it added.
The Sardar Sarovar is a gravity dam in Gujarat, which will benefit four states -- Rajasthan, Madhya Pradesh, Maharashtra and Gujarat, according to SAIL.
One of the 30 dams planned on the Narmada, the Sardar Sarovar Dam is the largest of these structures to be built.
"The project will irrigate more than 18,000 sq.m. (190,000 sq ft), most of it in drought prone areas of Kutch and Saurashtra. The total installed capacity of the power facilities is 1,450 MW," the ministry said.


Sewer main construction works are scheduled to start on Merrigang Street in Bowral from January 17.
The work will be carried out between the intersections of Queen and Jasmine Streets for a distance of 350 metres.
Hours of construction will be 7am to 6pm Mondays to Saturdays.
One lane will be closed and detours will be in place.
The work is expected to be completed by mid February.


JE has completed numerous large-scale turnkey projects in different sectors including:
JE has extensive knowledge and insight in the construction of pipelines including water networks, drainage, oil & gas, and petrochemicals. Our vast Pipeline construction experience coincides several facets in civil and mechanical construction including trenching, welding and laying of pipelines, major crossings and commissioning.
Our focus areas include:
- Water Pipelines
- Sewage Pipelines
- Oil & Gas Pipelines
- Process Pipelines
- Fuel Pipelines
A key project that JE is currently working on is for the Public Works Authority (ASHGHAL). It involves the design and construction of 1,200 mm diameter transmission main with a total length of 30 km in Doha.


12 Jul Design and Build of Ha. Ihavandhoo Harbor is well underway
Design and Build of Ha. Ihavandhoo Harbor is well underway, with overall 53% project progress. We have completed dredging operations.
Scope of works for the project include dredging and excavation operations of 30,509cbm; the construction of a 95m quay wall; a 284m breakwater; and a 178m revetment. Additionally, the installation of navigation lights, installation of streetlights and construction of 4,582sqm of paved area will also be undertaken. The value of the project is MVR 51.7 million.


Chahan Wusu is a 309MW hydro power project. It is located on Xinjiang Kaiduhe river/basin in Xinjiang Uyghur Autonomous Region, China. The project is currently active. It has been developed in single phase. The project construction commenced in 2005 and subsequently entered into commercial operation in 2008.
|Project Type||Total Capacity (MW)||Active Capacity (MW)||Pipeline Capacity (MW)||Project Status||Project Location||Project Developer||Hydropower||309||309||–||Active||Xinjiang Uyghur Autonomous Region, China|
The hydro reservoir capacity is 74 million cubic meter. The gross head of the project is 130m. The total number of penstocks, pipes or long channels that carry water down from the hydroelectric reservoir to the turbines inside the actual power station, are 2 in number. The project generated 1,080 GWh of electricity. The project cost is $284.51m.
The project construction commenced in 2005 and subsequently entered into commercial operation in 2008.
Power Purchase Agreement
The power generated from the project is sold to Northwest Power Grid under a power purchase agreement with a contracted capacity is 1,080GWh.
Harbin Electric Machinery was selected as the turbine supplier for the hydro power project. The company provided 3 units of francis turbines, each with 103MW nameplate capacity.
Harbin Electric Machinery supplied 3 electric generators for the project. The generator capacity is 117.7 MVA.
All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.


Beach Erosion Control Project, Contract 2Deal to Elberon, NJ
The overall project that Agate Construction is working as subcontractor to Manson Construction consists of initial construction of new beach as shore protection through the towns of Deal and Elberon, NJ. In addition to the beachfill that Manson Construction is installing, Agate is constructing storm water outfalls, stone filled scour holes, intake pump structures, and modifying existing jetties and groins to facilitate the shore protection project. Included in these features is the construction of the largest capacity outfall structure located on the shoreline of New Jersey that will facilitate the transfer of the Poplar Brook to the Atlantic Ocean below the beachfill construction.
The storm water outfalls are extensions of existing structures as much as 940 linear feet out into the Atlantic Ocean that are required to transfer the local runoff seaward of the new beach construction. The intake pumping system is being constructed for Elberon Beach Club in order to provide clean ocean water for their pool facilities along with combined outfall system to handle drainage of these facilities. Jetty and groin construction consist of groin notching to allow for the sediment transport between existing hard features along with the removal of existing jetty rock to facilitate overall shore protection system. This project marks the initial construction of beach along this section of New Jersey’s coast and is an integral part of the overall Superstorm Sandy Recovery Program.


The project is situated near village Kawalewada in TirodaTaluka of Gondia District in Maharashtra State. The project envisaged construction of concrete bandhara across Wainganga River, Pump Houses at Kawalewada and Bodalkasa rising and gravity mains, distribution chamber, feeder canals and Renovation of the existing canals. The Irrigable command area of the project is 103825 Ha. and the water usage is 327 Mm¬¬¬3 from Wainganga River and 363 Mm3 from Irrigation Tanks in the command.
We have been awarded the work of Command area survey, planning, design and drawings of the Dhapewada Lift Irrigation Scheme Stage – II. We have completed the command area survey work of 112578.73 Ha. In the command area of the Project there are no. of irrigation tanks having their individual command area. We have surveyed the entire area and have given planning of the alignments of Rising Mains from the pump houses and Gravity mains. The total length of the Rising Main is 208.25 Km. The alignments of the Rising mains have been prepared by us after surveying the total command area by using modern techniques like Satellite survey, Total station etc. The survey of various canal alignments of length 421.255 Km is done by us. The alignment proposals along with design of the canal section and location of various structures on canal alignment are marked as per the various Government circulars. We have also designed 239 Nos. of canal regulatory and cross drainage works on the canal alignments.
We have also surveyed the command area of the existing Minor Irrigation Tanks in the command area of the Project. Revised Alignment Proposals of the existing canals in the command area are prepared and design and planning of the existing canal system has been done using modern design techniques. The design of the canal distribution network is done up to field chak level using the satellite survey and other modern design techniques.


« View county listFlood Warning
650 PM CST Thu Nov 15 2018
The Flood Warning continues for
The Mississippi River At Red River Landing.
* until Monday November 26.
* At 5:00 PM Thursday the stage was 48.4 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Flood stage is 48.0 feet.
* Forecast...The river will continue rising to near 49.0 feet by
Saturday early afternoon. The river will fall below flood stage
Sunday November 25th.
* Impact...At 48.0 feet...Access roads will be inundated and
evacuation of all river islands must be complete. Protection of
people and property in the river bottom land on the river side of
the levees must be complete.
* Impact...At 46.0 feet...River traffic will become dangerous. A levee
crevasse would flood adjacent farm land. Significant flooding of
Raccourci Island will continue and evacuation of the island is
* Impact...At 45.0 feet...Between the 40 and 45 foot stage flooding of
Raccourci Island becomes significant. At the 45 foot stage
evacuation of the island is recommended.
LAT...LON 3074 9137 3071 9159 3102 9170 3103 9153


As the dry season was taking hold the available capacity of the Village of Vesulogo dam was being questioned. Village elders decided that the dam wall needed to be raised to increase storage capacity through the dry season. The elders asked Kokoda Memorial Foundation for assistance. As many of the volunteers of KMF had construction experience it took only one day for the preparation and pouring of the concrete to form the new additional.
The new raised dam is now able to store additional water for the dry season.


Corps of Engineers to dredge section of Upper Chesapeake BayProject Updates // February 17, 2017
The US Army Corps of Engineers’ Philadelphia District will begin maintenance dredging a section of the Upper Chesapeake Bay in late February of 2017. Work is expected to be completed by the end of March 2017.
The project area extends from the Sassafras River to Fairlee Creek. Dredged material will be beneficially reused at the Paul S Sarbanes Ecosystem Restoration Project at Poplar Island located on the eastern side of the Chesapeake Bay.
Great Lakes Dredge & Dock Company has been awarded a US$5.8 million contract for dredging of the shipping channel.
The project is part of the Inland Waterway Delaware River to Chesapeake Bay Project, which helps ensure safe and reliable maritime commerce from the Delaware Bay to the Chesapeake.


DPWH lines up P620.6-M flood control projects in Pangasinan
The Department of Public Works and Highways (DPWH) fourth engineering district office in Pangasinan has 22 flood control projects underway for towns and cities in the province, an official said Wednesday.
Daisy Sharmaine Daroy of the monitoring engineering department of DPWH-Pangasinan IV said among the flood control projects for this year are the construction of protection works along Ingalera River Macabito section costing PHP20 million, in the Nagsaing Doyong section worth PHP30 million, and along Marusay River Barangay Talibaew in Calasiao town for PHP30 million.
In San Carlos City, Daroy said the agency is also constructing protection works along Agno River at Barangay Guelew for PHP50 million, at Barangay Supo for PHP50 million, and river bank protection along Ingalera River Ano section worth PHP32.179 million.
“There is also the construction of protection works along Angalacan River at Barangay Sta. Maria and at Barangay Baloling Mapandan worth PHP30 million and PHP50 million, respectively,” she said in an interview.
In Bayambang town, Daroy said the construction of protection works along the different sections of Agno River is ongoing.
She said protection works in Bacnono section is worth PHP23.179 million; Ambayat 1st section -PHP7 million; and Carungay section -PHP3 million.
She added the DPWH also allocated PHP20 million for the construction of river bank protection along Agno River specifically in Caturay section; Warding section -PHP40 million; and Zone V section -PHP11 million.
For slope protection works along Agno River at Barangay Bongato West, the DPWH earmarked PHP30 million; Baragay Iton -PHP50 million; Barangay Manambong Norte -PHP20 million; Barangay Manambong Sur -PHP50 million; Barangay Wardig -PHP10 million; Phase 1 at Paragos -PHP20 million; Phase II at Paragos -PHP30 million; and Phase III at Paragos -PHP14.252 million.
Daroy said the funding for the projects come from the General Appropriation Act of 2019.


BY LORRAINE WOHI
Water level at the Yonki Hydro Dam in Kainantu, Eastern Highlands Province, is critically low and affecting the Ramu Grid to the Mamose and Highlands regions.
PNG Power Ltd confirmed that water levels in the catchment area had reached critical level due to the impact of an unusual dry season experienced in the area.
The reduced water levels have forced PNG Power to decrease generating capacity and carry out load-shedding on the Ramu Grid.
PPL chief executive officer Obed Batia said currently, the Ramu Hydropower station was operating 35 per cent of its total generation capacity due to the reduced water levels.
He said PPL was accelerating projects to rehabilitate alternate power generating supplies, to reduce the need for load shedding.
“Centres supported by the Ramu grid will supplement power supplies with generators, where possible,” he said.
“Load-shedding will continue until water levels improve substantially and generating capacity can return to normal operations.
He said the Independent Power Producers (IPP) were continuing to meet generating capacity shortfalls, especially in Lae with Posco Daewoo (Munum power station) and PNG Forest Products through their Baiune power station.
PPL relies heavily on clean, hydroelectric power.
Presently, 38 per cent of the power generated on the company’s three grids originates from PPL’s hydroelectric facilities.
Mr Batia also confirmed that similar issues were occurring at the Sirinumu Dam in Port Moresby, supplying the Rouna hydropower station and the river system feeding the Warangoi hydropower station in East New Britain Province.
“PPL is appealing to the public to be mindful of water use and to conserve and ration water supplies when possible. The situation is unlikely to improve,” he said.
in the short term.”


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The high pressure resistant (up to 5 bar) of the mechanical seal will greatly increases the maximum submersion depth.
This Fujico series provide a wide range of selection pump sizes from 50mm (2") up to 80mm (3") discharge port size.
The motor power size range from 0.4kW (0.55HP) up to 1.5kW (2HP), all motor designed to hermatically sealed and equipped with built-in thermal protection feature.


Hydraulic structure Slezská Harta [ Vodní plocha ]
Water work was built in 1987 - 1997 on the Moravice.
The main purpose of the building was supply of water for the region of Ostrava.
The earth fill dam is 64,8 m high, its length in the crest is 540 m.
The flooded area of the reservoir is 870 ha.
The reservoir further serves hydroenergetic purposes, as protection against floods, for fish-farming, sport fishing and recreation.
LAST MODIFY: Šormová Helena
(INFOSYSTEM s.r.o.) org. 56, 20.09.2021 v 18:37 hodin


Leonard Ncube in Livingstone, Zambia
THE proposed Batoka Gorge Hydro-Electric Scheme (BGHES) which is expected to generate 2 400 megawatts of electricity will boost power generation at the Kariba Hydropower Station as it will help increase water levels and storage, a top Zambezi River Authority (ZRA) engineer has said.
Tendering for the $4 billion project is expected to start before the end of the year with implementation set for next year, once the feasibility study is completed.
Yesterday, ZRA officials led delegates, mostly potential investors who attended the BGHES investors’ conference in Livingstone on Thursday, on a tour of the dam site.
The site of the dam wall has been pegged on either side of the river while the two power stations will be about 700 metres downstream.
Briefing delegates, ZRA engineers, led by the chief executive officer Engineer Munyaradzi Munodawafa said the Kariba Dam has potential to match generation levels at Cabora Bassa in Mozambique once the Batoka project is implemented.
“The Batoka power station will help boost Kariba Dam power generation as the dam will naturally increase storage downstream. The Batoka Dam will slow down water speed hence increase water levels in the Kariba Dam,” said Mr Munodawafa.
Engineers said this would boost Kariba Dam generation capacity to about 1 200MW from about 750MW.
Eng Munodawafa added: “That’s the beauty of conjecture operations. We will have a situation whereby power generation will be increased and this is how Cabora Bassa manages to have more electricity because the dam relies on Kariba Dam upstream which slows water flow and enhances higher levels and storage downstream.”
Low water levels at the Kariba Dam have over the years led to acute electricity shortage resulting in load shedding as authorities capped generation capacity at Kariba Hydropower Station at below 750MW.
Eng Munodawafa said while the BGHES will take about five years to complete, generation of power will start as soon as construction starts.
“Generation will not wait for the dam to be completed but will start as soon as water levels rise when building of the dam wall starts,” he said.
Engineers said the dam wall will be 180 metres high while the length will be 300 metres, adding that any height above 180 metres would flood upstream up to Victoria Falls by 90 metres.
A bridge will also be constructed downstream as part of the project to facilitate access by construction vehicles as well as enhance ease of travel between Zimbabwe and Zambia thereafter.
African Development Bank vice president Mr Amadou Hott and representatives from Ernst and Young were some of the notable development partners who visited the site.
Zambia Minister of Energy Mr David Mabumba said implementation of the project was critical to both countries who can export excess power while also supplying citizens who have suffered a lot due to power deficit.
Source: ZRA delegates tour Batoka Dam site (1/4/17)


Wolf Creek is a 270MW hydro power project. It is located on Cumberland river/basin in Kentucky, the US. The project is currently active. It has been developed in single phase. The project construction commenced in 1940 and subsequently entered into commercial operation in 1951.
|Project Type||Total Capacity (MW)||Active Capacity (MW)||Pipeline Capacity (MW)||Project Status||Project Location||Project Developer||Hydropower||270||270||–||Active||Kentucky, the US|
The project is currently owned by United States Army Corps of Engineers with a stake of 100%.
Wolf Creek is a reservoir based project. The hydro reservoir capacity is 7,511 million cubic meter. The net head of the project is 4.06m. The project generated 800 GWh of electricity.
The project construction commenced in 1940 and subsequently entered into commercial operation in 1951.
Power Purchase Agreement
The power generated from the project is sold to East Kentucky Power Cooperative under a power purchase agreement.
Andritz Hydro was selected as the turbine supplier for the hydro power project. The company provided 6 units of francis turbines, each with 45MW nameplate capacity.
GE Renewable Energy supplied 6 electric generators for the project. The generator capacity is 50 MVA.
All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.


The Petit Library project was part of the Onondaga County Public Libraries (OCPL) “Green Library Initiative,” a partnership between the Save the Rain program and OCPL to capture stormwater while providing aesthetic benefits to the libraries.
Porous concrete areas were installed within the pre-existing parking lots of Petit Library. Beneath the porous concrete areas are large stone infiltration basins designed to capture runoff from the whole parking lot. The two infiltration basins are also connected to an existing catch basin along Victoria Place, so that in the event of a large storm event, stormwater that exceeds the capacity of the infiltration basin systems is able to overflow into the combined system.
Download project details below:
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The Environment Agency’s Calder Valley scheme will protect up to 400 homes and businesses.
VBA comprises VolkerStevin, Boskalis Westminster and SNC-Lavalin’s Atkins business.
Mytholmroyd is between Hebden Bridge and Sowerby Bridge. The scheme will provide improved protection to the area around Mytholmroyd Church, Cragg Brook, Greenhills Industrial Estate, Caldene Bridge and up-stream to Hawks Clough Bridge.
Following initial drainage works, the project will include new raised and improved flood walls, the relocation of Caldene Bridge, widening of the river channel at key locations, and flood proofing buildings next to the river.
The work started in April 2018 and is expected to be completed in winter 2019/20.


Nyadi Hydropwer Limited (NHL) has been established to build, own and operate Nyadi Hydropwer Project in Lamjung District. BPC is the major shareholder of NHL followed by LEDCO. The project is under development and the planned installed capacity of the project is 30 MW. Commercial operation of the project is scheduled in 2014.
Nyadi Hydropower Limited
Ganga Devi Marg – 313, Buddhanagar, Kathmandu
Tel: +977-1-4781776, 4785295


Rio Guayllabamba - Ecuador
Hidroequinoccio HEQ S.A.
2009 - 2012
Description for Chespi Hydropower (Ecuador)
Chespi is the first hydroelectric project of the Guayllabamba cascade with an installed power of 468 MW.
- Reservoir (V = 2.3 Mm³)
- Arch dam (H = 68 m, L_crest = 144 m, V = 45'000 m³)
- Headrace tunnel (L = 18.3 Km, D = 5.4 m)
- Tailrace tunnel (L = 6.3 Km, D = 6.4 m)
- Surge Shaft (H = 123 m, D = 15 m)
- Penstock (L = 1'000 m, D = 4-3.4 m)
- Underground power house (No. 4 Pelton turbines, IP = 117 MW each)
Arcichiaro Multi-purpose Project (Italy)
Rockfill dam with bituminous facing (BFRd) with a reservoir for irrigation,...
Lusaka Aqueduct (Zambia)
Lusaka project including domestic water supply pipeline for the city of...
Bwari Aqueduct (Nigeria)
Water supply system for the district of Abuja, including pipelines, pumping...
Koysha Hydropower (Ethiopia)
Koysha (2’160 MW, under construction) is the...
Namakhvani Hydropower (Georgia)
Namakhvani hydropower cascade, envisages the...
Roma Est Sewage Plant (Italy)
Sewage treatment plant for domestic and industrial waste water.
Ulu Jelai Hydropower (Malaysia)
Ulu Jelai project consists in a RCC gravity dam...
Carpat Pumped Storage Plant (Romania)
Pumped storage plant with an installed power of 300 MW.
Kikonge Multi-Purpose Project (Tanzania)
Kikonge is a multipurpose project foreseen for...


The H25 pump uses a simplex-action piston to create approximately a 13:1 pressure ratio of discharge fluid to inlet air supply to generate up to 110.3 bar (1,600 psig). The H38 model uses a double-action piston to create a 26:1 pressure ratio of discharge fluid pressure to inlet air supply to generate up to 220.6 bar (3,200 psig).
These capabilities make the H25 and H38 advanced series metal piston pumps the most cost-effective solution for applications that require discharge pressures greater than the 1:1 pressure ratio that is traditionally inherent in most AODD pumps.
The maximum flow rate for the H25 is 4.1 lpm (1.1 gpm) and the maximum flow rate for the H38 is 7.6 lpm (2 gpm), with a maximum inlet air pressure of 8.6 bar (125 psig). Both the H25 and H38 advanced series metal piston pumps feature wetted housings that are made of aluminum. The H25 has a maximum suction-lift capability of 7.8m dry (25.5’), while the H38’s suction-lift capability is 7.1m dry (23.2’).


Construction of Oman's Al-Khaboura dam reaches completion
The $251,950 (OMR97,000) groundwater recharge dam project also included the construction of a road leading to the dam
Construction on a groundwater recharge dam project has been completed in the village of Meeha Bani Keum located within Oman’s Al-Khaboura province.
The dam was inaugurated under the patronage of the director-general of Municipalities in North Al-Batinah Governorate, Eng Suleiman bin Hamad Al-Sunaidi, in the presence of other dignitaries from the region.
The $251,950 (OMR97,000) groundwater recharge dam project also included the construction of a building and the road leading to the project.
The project is 35 metres in length, seven metres in height and 12 metres in width, and has an estimated storage capacity of 143,000 cubic metres.
The project will make the most of large quantities of rainwater accumulated in the valley near the village to provide safe drinking water as well as irrigation for the plants in the region, according to the state-run Oman News Agency.


The L-600 series Dosing pump is designed to inject chemicals into piping system.All models are equipped with a side mounted mechanical flow rate adjustment knob.Optional on/off cycling timers are available
Features & Advantages
Double ball ceramic check valves. PVDF(Kynar) valve assemblies.
High outlet pressure capability of 125 PSI. Easy access,side mounted mechanical feed rate adjustment.
Ball bearing supported motor drive shaft. Permanently lubricated ball bearing motor. 27:1 adjustment turn down ratio.
Includes suction tube,foot valve and strainer, suction tubing, discharge tubing and injection fitting with internal back-flow check valve
and mounting hardware


Sewage lifting unit with solids separation system for installation in a building or concrete sump.
Connection-ready fully submersible sewage pumping station with solids separation system and a gas- and watertight collection tank. Equipped as a double-pump system with submersible sewage pumps, running in alternating mode. Easy handling and optimum tank drainage by means of deep extraction by suction.
System for installation in an existing structure (building or concrete sump).
Sewage lifting unit with solids separation system for drainage of large residential estates and boroughs or as a replacement system for the refurbishment of existing large concrete sumps.


"Teploenergomash" LLP plans to build two power plants on Big Almaty Channel with a total capacity of 12 MW. This project with 2028, 6 bn. tenge investments has already been launched. 4.8 hectares of land has been allocated for construction of future power plants as well as funds in the amount of 350 million tenge for preparation of design and estimate documentation.
It is also planned to create a 19-22 HPP cascade on Shelek river of Enbekshikazakh area with total capacity of 60,8 MW (Almaty region).


Australian Government Bureau of Meteorology, Queensland
Moderate Flood Warning for the Thomson River and Cooper Creek
Issued at 9:16 am EST on Monday 19 March 2018
Flood Warning Number: 17
Moderate flood levels are expected to be occurring in the Cooper Creek at
No significant rainfall is expected over the next few days.
Minor to moderate flood levels continue along the Thomson River downstream from
Longreach, with the flood peak currently in the Stonehenge area on Monday
Observations from Stonehenge manual station are unavailable but based on
heights from the Stonehenge automatic station, river levels are expected to be
just below the moderate flood level (3.00 metres) during Monday morning. The
Thomson River at Stonehenge is expected to remain above the minor flood level
(2.00 m) during Monday.
The Thomson River at Jundah is currently at 3.85 metres and rising. The river
level at Jundah may exceed the moderate flood level (4.00 m) during Monday.
Moderate flooding is occurring along the Cooper Creek.
Observations from Windorah manual station are unavailable, but river levels are
expected to be above the moderate flood level (4.00 metres) and rising during
Monday morning. The creek level at Windorah is expected to remain above the
moderate flood level (4.00 m) during Monday.
Flood Safety Advice:
Remember: If it's flooded, forget it. For flood emergency assistance contact
the SES on 132 500. For life threatening emergencies, call Triple Zero (000)
Current emergency information is available at www.qld.gov.au/alerts
The next warning will be issued by 10:00 am EST on Tuesday 20 March 2018.
Latest River Heights:
Thomson R at Bogewong TM, 2.65, Falling, 06:00 AM MON 19/03/18
Thomson R at Jundah, 3.85, Rising, 06:00 AM MON 19/03/18
Barcoo R at Retreat, Not Available
Cooper Ck at Windorah TM, Not Available
Cooper Ck at Lignum Channel TM, 0.58, Steady, 06:00 AM MON 19/03/18
This advice is also available by dialling 1300 659 219. Warning, rainfall and
river information are available at www.bom.gov.au/qld/flood. The latest weather
forecast is available at www.bom.gov.au/qld/forecasts.


Material: Stainless steel , Cast Iron
Size: 1/2“~14” , DN15mm~DN350mm
Flow Rate (Q) 2 - 1400 (m3/h)
Lift Head (H) 5 - 135 (m)
Centrifugal pumps are utilized to transport fluids through the conversion of rotational kinetic energy towards the hydrodynamic energy from the fluid flow. The rotational energy typically originates from an electric train engine or electric motor. The fluid enters the pump impeller along or near the rotating axis and it is faster through the impeller, flowing radially outward right into a diffuser or volute chamber (casing), where it exits.
Common uses include water, sewage, oil and petrochemical pumping a centrifugal fan is generally accustomed to implement a vacuum. Overturn purpose of the centrifugal pump is really a water turbine converting potential energy water pressure into mechanical rotational energy.


Ethiopia: plans to construct 2000MW hydro dam in underway
Plans to construct 2, 000MW hydro dam in Ethiopia, on the lower bank of the Omo River are underway. An Italian export credit agency, Servizi Assicuative del Commerce Estero (SACE) has agreed to fund the development.
Ethiopia’s Prime Minister Hailemariam Desalegn said that the deal for the construction of the dam, dubbed Koysha dam, followed successful negotiations between Ethiopia’s Electric Power (EEP) and Italian construction firm Salini Costruttori.
The mega development of the dam is projected to cost US$ 1.7bn and will be funded by the Italian company.
An Ethiopian delegation led by Azeb Asnake, CEO of EEP, and the head of the Ministry of Finance and Economic Cooperation’s Legal Affairs Directorate Wasihun Abate, flew to Rome to seal the financing agreement.
Under its five-year development plan, Ethiopia has made it a priority to increase their energy supply and is currently looking to utilise its rivers for power generation. They also recently signed a US$4bn deal for the construction of a 1,000MW geothermal facility with a US-Icelandic firm Reykjavik Geothermal. It will be Ethiopia’s first privately-run power plant.


Hydraulic reservoir capacity is 25 gallons.
Position suitable drain pan under hydraulic reservoir (2), remove drain plug (3) and open drain valve (4).
Drain hydraulic reservoir.
Close drain valve (4) and install drain plug (3).
Adhesives, solvents, and sealing compounds can burn easily, can give off harmful
vapors, and are harmful to skin and clothing. To avoid injury or death, keep away from
open fire and use in well-ventilated area. If adhesive, solvent, or sealing compound
gets on skin or clothing, wash immediately with soap and water.
Apply sealing compound to threads of drain plug (3).
Ensure drain valve (4) is closed and install drain plug (3) on drain valve.
Fill hydraulic reservoir (2) (Para 2-9, Table 2-2).
Install hydraulic reservoir filler breather cap (1) on hydraulic reservoir (2).
END OF TASK


Kalivac - Albania
ENEL POWER S.p.A.
2000 - 2001
Description for Kalivac (Albania)
Kalivac Hydropower Plant has 108 MW of installed power.
- Reservoir (V = 350 Mm³)
- River Diversion (Q = 2'500 m³/s)
- Steel sheet pile cellular cofferdam
- Concrete Gravity Dam (H = 80 m, L = 375 m, V = 540'000 m³)
- Spillway (N° 15 gates 5.5x12.5 m, Ski-jump type, Q = 4'500 m³/s)
- No. 2 Outlet (Q = 540 m³/s)
- No. 2 Intake (Q = 285 m³/s)
- Outdoor Power House (No. 2 Kaplan turbines + No. 1 Francis turbine, IP = 107.4 MW)
- No. 2 Transformers (Rated voltage = 150 / 10 kV, Rated power = 63 MVA)
Bituminous face rockfill dam for irrigation, water supply and hydropower...
Giurgiu Ramiresti (Romania)
Irrigation scheme with water from the Danube and irrigated area of 155'000...
NAO (Sierra Leone)
Restore of the MV and LV distribution system in the two towns of Makeni and...
King Talal (Jordan)
The assignment comprises the assessment of conditions of the existing plant...
Jamaica 5 (Jamaica)
This project includes prefeasibility and feasibility studies for five small...
La Gogue (Seychelles)
The scope of the assignment is the rehabilitation and upgrade of the existing...
Little Beles (Ethiopia)
Reservoir for water supply with a storage capacity equal to 3.5 Mm³.
Addis Ababa urban water supply scheme with a storage capacity of 40 Mm3.
Multi-purpose project on Lake Tana, including hydropower plant and irrigation...


2.5” ss progressive cavity pump
The 2.5” stainless steel progressive cavity pump has 2.5″ tri-clamps on inlet and outlet and a food-grade silicon stator. This pump has a similar capacity to the regular 3″ progressive cavity pump. It is also available with the automatic ultrasonic level sensor which controls the variable speed drive directly speeding up the pump as the level rises and slowing it down as the level recedes.
The power requirements for this pump are 220v 1ph 20a


Bhutan, India Enter into Joint Hydropower Venture
30 June 2020
The Governments of Bhutan and India signed an agreement for the first joint venture hydropower project between Bhutan and India. This agreement covers the construction of the 600 megawatt Kholongchhu hydropower project in Bhutan.
The run-of-the-river Kholongchhu hydropower project is located on the lower section of the Kholongchhu River in Trashiyangtse, Bhutan. The project includes an underground powerhouse of four 150 MW turbines with water impounded by a concrete gravity dam of 95 metres height.
The agreement was signed in the presence of Mr. Subrahmanyam Jaishankar, Minister of External Affairs of the Government of India, and Mr. Tandi Dorji, Minister for Foreign Affairs of the Government of Bhutan, through a video link. Both ministers highlighted the importance of hydropower development between Bhutan and India at the event, and described the project as mutually beneficial.
The Kholongchhu Hydro Energy Limited is a joint venture between Druk Green Power Corporation of Bhutan and Satluj Jal Vidyut Nigam Limited of India.
The project is expected to be completed in the second half of 2025.


Ideal to be used at confined spaces, this Taha Long Lifting Hydraulic Jack is a perfect combination of durability and strength. It comes with maximum sized springs with speedy piston return features. This is designed with a strong plunger wiper to reduce contaminants. In addition to this, it is also designed with powder coat finishing to resist corrosion and abrasion. This Taha Hydraulic Long Lifting Hydraulic Jack is designed in solid construction and structure with low maintenance cost.


Connecting Channel for Tioga and Hammond Lakes, Tioga River and Crooked Creek, Pennsylvania: Hydraulic Model Investigation.
Final rept. Mar-Jun 74,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
A channel will be excavated to connect the west side of Tioga Lake with the east side of Hammond Lake to permit the two reservoirs to be operated as one flood-control project. An overflow structure will be used to keep the drainage in Tioga Lake from entering Hammond Lake until storage in Tioga Lake exceeds the weir crest. Normal flows from Hammond Lake to Tioga Lake will be controlled by an outlet works in the structure, and flood flows in this direction will pass over the weir. The model investigation was concerned with the adequacy of the connecting channel and its associated structure. The study was conducted in a 180-scale model which reproduced a portion of the Tioga and Hammond reservoirs, the connecting channel including a plunge pool, weir, and outlet works, and the Tioga Lake outlet works in the structure.
- Hydrology, Limnology and Potamology


Part-I: Flow through Draft Tube and Tail race channel (TRC)
Turbulent flow through draft tube and Tail Race Channel (TRC) of Maneri Bhali Hydroelectric Project Stage-II is simulated using CFD. The free surface is evaluated using a Euler-Euler model and the turbulence characteristics are evaluated using two equation κ-ε (turbulent-kinetic energy and eddy dissipation) model. The entire domain including the draft tub and the tailrace sections is meshed with a structured grid. Two phase turbulent flow simulations are taken up for flow through the draft tube geometry along with the tailrace. Air is taken as the secondary phase, above the water level in the tailrace channel. Several planes in the draft tube section are considered for the purpose of flow visualization. Analysis reveals the issue of improper evacuation of the flow through draft tube when all the turbine units were running at full load. This is because of a nuzzling effect near the outlet structure of the tailrace. Such restrictions induce violent vortices in the tail race channel and reverse flow in the draft tube.
Part-II: Flow through Turbine units including draft tube and TRC
The simulations considered in Part-II involve all the major components of the hydroelectric power plant including spiral casing, the runner, the draft tube and the tailrace. Results for all the four runners running at designed discharge of 35 cumecs, rated head of 247.6m and rated output of 76 MW are analysed along with the results for 10% excess of total installed capacity of 304 MW (i.e. 334 MW) as was suggested by UJVNL vide letter no. 336/E&MDesign-II/CFD dated 10th July 2010. This report aims at apprising UJVNL about the nature of flow at the present power output of the station and suggest that the rated 304 MW as well 334MW (up-rated) cannot be reached safely unless the evacuation from the tailrace is improved.
These investigations were carried out to ascertain the effect of concrete cladding on the rise in water level at the outlet of Tail race channels in THDC project. The concrete cladding is provided on the opposite bank of the river. Numerical simulations are carried out for flow in the river pocket with the provision of cladding on the opposite bank and without it. The rise in water level at TRT 1 and TRT 2 are analysed due to the presence of cladding. Results are obtained for full load as well as part load operating conditions of the plant. An estimate is also made for the equivalent power loss expected due to the rise of water levels in the tailrace tunnels due to the provision of cladding.
Hammering sound is reported in the machines from Tail Race Channel (TRC) area while operating the machines between ranges of 75MW to 90MW load at Koteshwar HEP of THDCIL, India. The main objective of present study was to identify the possible reasons for undesirable sound in the machine and TRC area under part load conditions through CFD analysis of Hydro Turbine Units. The systematic study including the selection of turbulence model, performance of selected turbulence model on physical model data and the performance of prototype plant under different operating condition is analysed. The CFD simulations reveals that the wake regime behind the guide vane and the oscillating nature of vortex rope are the possible reasons for generation of noise at part load operation between 75MW – 85 MW of the units.
Analysis of flow through hydro turbine unit including tail race channel of Manerbhali hydroelectric project Stage-I for finalization of the location of outfall gate in the tail race channel. The complete CFD analysis of the power plant is carried out into two parts. In part – I the CFD simulation of flow through existing tail race channel are reported in isolation first. Then the simulations are carried out by placing the proposed outfall gate structure at four different locations (at 65 m, 70m, 75m and 80 m chainage distance) in the Tail Race Channel (TRC) for finding out the reverse flow in the tailrace channel and rise in water level in the TRC associated with the obstruction created due to placing the proposed outfall gate in TRC. In part – II, the complete CFD simulation of flow through turbine units including spiral cashing, stator, rotor passage, draft tube and tail race channel of Manerbhali-I hydroelectric project is reported for estimating the loss of power associated with the positioning of the proposed outfall gate at 65m, 70m and 75 m chainage distance in the tailrace channel.
Mixed flow compressors are modified version of the centrifugal flow compressors and combine the advantages of axial and centrifugal flow compressors. The present work utilises a design methodology for the impeller of the mixed flow compressor such that it can work with an efficiency and mass flow rate close to axial flow compressor along with the pressure ratio per stage, resistance to foreign particles and ruggedness comparable to a centrifugal compressor. The focus is in understanding the various design philosophies and pick out one which best suits in accordance with available inputs and parameters.


August 21, 2019: In what can be termed a significant development towards construction of Diamer Basha Dam, the Pakistan Water and Power Development Authority (WAPDA) today received bids for construction of Dam Part of the Project here at WAPDA House. As many as two Joint Ventures (JVs), comprising one foreign and one local firm each, submitted their technical and financial bids for the purpose. These JVs include China Gezhouba Group Company – GRC JV and Power Construction Corporation of China – FWO JV.
Diamer Basha Dam will be constructed across River Indus about 40 kilometers downstream of Chillas Town. It is a multipurpose Project aims at water storage, flood mitigation and power generation. The Project will have a gross water storage capacity of 8.1 million acre feet (MAF) and installed power generation capacity of 4500 megawatt (MW).


The Calpeda GXR & GXV are open single-impeller submersible drainage pump in chrome-nickel steel, with vertical delivery port.
GXR: With open impeller
GXV: With free-flow (vortex) impeller
Motor cooled by the pumped water passing between the motor jacket and the external jacket. Double shaft seal with oil chamber.
The GXR can be used to pump clean water containing solids up to 10mm grain size, making it ideal for:
For outdoor use a power supply cable of not less than 10 m should be used in accordance with: EN 60 335-2-41.
Pump casing, strainer, impeller, motor jacket & pump jacket – Chrome-nickel steel 1.4301 EN 10088 (AISI 304)
Handle – Polypropylene
Shaft – Chrome-nickel steel 1.4305 EN 10088 (AISI 303)
Mechanical seal – Ceramic alumina/Carbon/NBR
Seal lubrication oil – Oil for food/pharmaceutical machinery


The turbines manufactured by Leningradsky Metallichesky Zavod are installed on all main hydropower units of the Volzhskaya HPP
A hydropower unit with serial number 10 was put into operation at the Volzhskaya HPP after retrofitting. This hydropower unit had its hydraulic turbine and hydrogenerator and auxiliary equipment replaced.
New generating equipment manufactured by St. Petersburg enterprises was created using advanced developments of power engineering and has improved technical characteristics. The new hydropower units are more efficient, which has already made it possible to increase the capacity of the Volzhskaya HPP from 2,541 MW to 2,671 MW. In the future, the installed capacity of the plant will increase to 2,744.5 MW.
Currently, the Volzhskaya HPP continues to upgrade hydropower unit No. 4 with the replacement of the generator and auxiliary equipment. It is planned to complete replacement of the remaining hydrogenerator in 2026 so that all hydropower units will be upgraded at the plant (except for the low-capacity and rarely used auxiliary hydroelectric unit).
In addition to updating the hydraulic power equipment, the gates of the spillway dam and trash grids are being replaced as part of the Comprehensive Modernization Program, and retrofitting of 500 kV switchyard is planned with the use of SF6-insulated equipment (GIS).
The Volzhskaya HPP is the lower, most powerful stage of Volga-Kama cascade and the largest hydroelectric power plant in Europe. Due to its power cycling, the Volzhskaya HPP is of considerable importance for ensuring the reliable operation of the Russian national grid. The long-term annual average electric power output is 11.5 billion kWh.


[Article by Nane Zietsman]
A new diversion works and weir were recently completed on the Holsloot River for irrigation, replacing the weir that washed away during the 2013 flood. The Stellenbosch Hydraulics Laboratory (SHL) of the Department of Civil Engineering at Stellenbosch University (SU), was appointed by the Western Cape Department of Agriculture to do the hydraulic design and physical model study for the project. This R78 million project is located on the Holsloot River, approximately 10km south-east of Rawsonville and 11km downstream of the Stettynskloof Dam. It is set to directly impact approximately 150 farming households and 4 000ha of mainly wine grapes under irrigation.
Professor Gerrit Basson, a specialist in river hydraulics, sedimentation and the design of hydraulic structures led the SU consulting team. “During the design and construction phases of the project the Stellenbosch Hydraulics Laboratory (SHL) acted as the main consulting engineers responsible for the hydraulic design, while Ingerop consulting engineers were appointed as sub-consultants for the geotechnical and structural design, as well as site supervision.”
According to Prof. Basson, the SHL team was involved throughout the lifecycle of the project, from feasibility level to construction completion and commissioning. “It is particularly fulfilling to see a design come to life and to compare prototype river flows with those tested in the laboratory.” The Holsloot Diversion Works was required to replace a number of temporary rockfill diversion weirs as part of a more sustainable river management plan. “Diversion works are typically faced with sedimentation issues whereby sediment deposits block intakes or are abstracted while downstream erosion can threaten the structural integrity of the weir, particularly in this case where there was no rock for the weir to be founded upon.”
The hydraulic design and physical model study resulted in the construction of a 55 m long and 3,4 m high weir, with a concrete roller bucket for energy dissipation. “The intake was designed to be self-scouring during floods with a gravel trap and two sand traps at the intake structure that can be flushed during smaller floods as required.” The design used a 100-year Recommended Design Discharge (RDD) of 579 m3/s and a Safety Evaluation Discharge (SED) based on the Regional Maximum Flood (RMF) of 1136 m3/s. Prof. Basson further explains that the diversion works and roller bucket had to be constructed with safe accessibility, so the design includes a pedestrian bridge over the roller bucket which is uncommonly seen. “The piers had to be designed to resist hydraulic forces and debris accumulation in the roller bucket.”
The project has formally been handed over to the Holsloot Water User Association to function with CASIDRA acting as the implementation agent for the Western Cape Department of Agriculture. The significant work of the Stellenbosch Hydraulics Laboratory on this project once again shows the impact of the Faculty’s research and consulting services on the industry.
Photograph: Holsloot Diversion works and weir viewed from downstream (left) and upstream (right).


The Optimization of the Design of a Concrete Faced Rockfill Dam by the Application of Sand-Gravel Fill Zones
R. Haselsteiner& V. Balat
EnerjiSA Enerji Üretim A.S., Ankara, Turkey
Fichtner GmbH & Co. KG, Istanbul, Turkey
ABSTRACT: The design of the dam case study presented was changed during different design and planning stages, switching from an ordinary CFRD type to a quite sophisticated CFSGD with deep foundations. Whilst obtaining more detailed information on the geological conditions and the available fill materials the engineers responsible decided to use the alluvial deposits close to the dam area for the fill.
Originally, the dam was to have shallow foundations on the alluvial deposits present before clay layers with considerable thicknesses were encountered within the dam foundation. Therefore, the complete foundation concept had to be changed to a deep foundation in a highly permeable alluvium. Additionally, the left bank suffered from landslides during initial excavation works for the energy tunnel inlet so that the stability and design adjacent to the left bank has to be re-evaluated and re-designed. After agreeing on the detailed design principles and a general dam design material, investigations are ongoing and the optimization of the dam design is expectedto be completed before starting dam fill works in mid of 2011.
Please find the full article enclosed!


- Flood Warning issued October 02 at 1:44AM CDT until October 05 at 6:15PM CDT by NWS
- Effective: 1:44 a.m. on Thursday, Oct. 2, 2014
- Expires: 6:15 p.m. on Sunday, Oct. 5, 2014
...The Flood Warning is cancelled for the following rivers in
Tarkio River at Fairfax affecting Atchison and Holt Counties.
...The Flood Warning continues for the following rivers in Kansas...
Missouri River at St Joseph affecting Doniphan...Andrew and Buchanan
Moniteau Creek near Fayette affecting Howard County.
Petite Saline Creek near Boonville affecting Cooper County.
...The Flood Warning continues for the following rivers in
Blackwater River near Blue Lick affecting Cooper and Saline
Lamine River near Otterville affecting Cooper County.
Missouri River at Atchison affecting Atchison...Buchanan and Platte
Missouri River at Leavenworth affecting Leavenworth and Platte
The Flood Warning continues for
The Blackwater River near Blue Lick.
* from late Friday night to Sunday evening.
* At 12:45 AM Thursday the stage was 8.3 feet.
* Flood stage is 24.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by Saturday morning and continue
to rise to near 24.7 feet by early Saturday afternoon. The river
will fall below flood stage by Saturday evening.
* At 24.0 feet...Cropland and pastures along the river flood.
Location FS Stage Day/Time Forecast
Blue Lick 24 8.3 Thu 01 AM 24.7 early Saturday
- See more at NOAA


- Flood Warning
The Flood Warning continues for the Mississippi River.
The Flood Warning continues for
the Mississippi River at Memphis
* until Saturday, February 29.
* At 10 AM Monday the stage was 35.3 feet.
* Minor flooding is occurring.
* Flood stage is 34.0 feet.
* The river is near crest and will hold steady through midweek, then
begin a gradual fall. The river level is forecast to remain above
flood stage through the end of the month.
* At 36.0 feet...In Tennessee, water is edging onto Fullen Dock Area.
Roads on the north side of the Loosahatchie River near its mouth
are beginning to flood. Riverside Park Marina begins to flood.
Instruction: A followup Flood Statement will be issued this evening or sooner if
For graphical river and flood information...please go to
www.weather.gov and click near Memphis on the map, then select Rivers
Do not drive through flooded areas...turn around don`t drown.
Stay tuned to your weather radio and your local news media for the
latest river information.


Moogerah Dam upgrade - Queensland
Location: Queensland, Australia
Date: May 2012 – December 2014
Designing a cost-effective solution to upgrade a dam for greater stability and spillway capacity, to comply with flood safety requirements
Moogerah Dam, approximately 60km west of Ipswich, Queensland, is a 40m-high, 219m-wide thin double-curvature concrete arch dam with an ungated spillway on the right abutment. It was constructed in the 1960s and, as the methods for flood estimation have advanced, it is now considered to have an inadequate spillway capacity.
Entura was engaged as the lead consultant to undertake the investigations and design of the Moogerah Dam upgrade, aiming to provide a staged upgrade of the dam to satisfy the latest flood capacity guidelines.
We undertook preliminary design of all stages of the preferred upgrade option and detailed design of the initial stages. This included three-dimensional finite element analysis (FEA) of the arch dam to develop the preferred upgrade arrangement. The FEA provided good insights into potential issues with the dam/foundation interface and dam stability, and allowed us to focus additional investigations specific to this aspect of the design.
Entura provided construction support for the first stage of the upgrade, which was completed in late 2014.
Entura reviewed the proposed concept design and developed a superior upgrade option that resulted in a reduction in capital works in the order of A$30 million through staging to meet both dam safety risk and regulatory requirements. A preferred staged upgrade to address the dam safety deficiencies at Moogerah Dam has now been designed and the initial stage of construction has been completed.


Home » Shop » 2002 – Seismic Assessment of Wyangala Concrete Gravity Dam and Intake Towers
N. Vitharana, G. Bell, J. Jensen and J. Sinha
When the storage was enlarged in 1971, Wyangala Dam provided a storage of 1220Gl. The original concrete gravity dam was completed in 1936 with an initial storage of 37.5Gl. The enlargement comprised the construction of a central core earth and rockfill dam utilising the existing concrete gravity as an upstream “toe” dam. At its deepest section, the toe (concrete gravity) dam is 60m high with a base length of 40m. The rockfill dam is 85m and the full supply level is at 75m. Two cylindrical reinforced concrete intake towers were constructed utilising the crest of the toe dam as their bases.
Screening level analyses commissioned by The NSW Department of Land and Water Conservation have recommended that detailed seismic assessment of the toe dam and intake towers be undertaken. In 2001, GHD Pty Ltd undertook inelastic time-history analysis using site-specific seismic loadings. Toe dam was modelled together with the rockfill dam using a 2-dimensional model. Intake towers were modelled incorporating the composite behaviour of concrete and reinforcing steel with limited concrete strains to prevent the loss of cover concrete and the buckling of longitudinal steel. Time-history analyses supplements by conventional pseudo-dynamic analysis procedures.
This paper described the constitutive modelling, structural analysis criteria, evaluation of hydrodynamic and dynamic earth pressures and the findings.
— OR —
ANCOLD is an incorporated voluntary association of organisations and individual professionals with an interest in dams in Australia.


"GoL Nam Ou Hydroelectric Power Plant 1272 MW Laos - Project Profile" contains information on the scope of the project including project overview and location. The profile also details project ownership and funding, gives a full project description, as well as information on contracts, tendering and key project contacts.
The "GoL Nam Ou Hydroelectric Power Plant 1272 MW Laos - Project Profile" is part of Timetrics database of 82,000+ construction projects. Our database includes a 10+ year archive of completed projects, full coverage of all global projects with a value greater than $25 million and key contact details for project managers, owners, consultants, contractors and bidders.
The Government of Laos (GoL) is undertaking the construction of Nam Ou hydroelectric power plant in Laos.
The project involves the construction of 1,272MW hydroelectric power plant and is being executed in two phases.
The first phase involves the construction of three dams, mainly in Luang Prabang and the second phase involves the construction of four dams in Phongsaly province.
The project includes the construction of a reservoir and seven hydropower plants along the 475km Nam Ou River.
It includes the construction of substations, powerhouses, and access roads, the installation of turbines, transformers, and generators, and the laying of transmission lines.
Due to the high construction cost and low demand for electricity, Sinohydro Corporation Ltd (Sinohydro) will initially build three power plants namely Nam Ou 2, 5 and 6 along the Nam Ou River, as part of the first phase with an installed capacity of 540MW.
Nam Ou 2 is a 20m water head and 49m-high concrete dam with total installed capacity of 120MW (3 x 40MW), Nam Ou 5 is a 49m water head and 74m-high concrete gravity dam with total installed capacity of 240MW (3 x 80MW) and Nam Ou 6 is an 88m-high geo-membrane rock-fill dam with a total installed capacity of 180MW (3 x 60MW).
The four power plants namely Nam Ou 1, 3, 4 and 7 along the Nam Ou River, as part of the second phase, will have total installed capacity of 732MW.
Multiconsult AS has been appointed as lead consultant for the first phase of Nam Ou 2 and Nam Ou 5 hydroelectric power plants. The scope of the work includes reporting and advice to the GoL and a review of project design, key project documents, compliance monitoring during construction, services during project commissioning and monitoring during the early stages of project operation.
Hydrochina Kunming Engineering Corporation has been appointed as front-end engineering design (FEED) and study consultant for the seven hydro-power plants.
In October 2007, Sinohydro signed a development agreement with GoL.
On April 11, 2011, the Master Agreement for seven dams was signed. According to the agreement, the project will be developed by Sinohydro on Build, Own, and Transfer (BOT) basis.
Power Construction Corp. of China Ltd has been appointed as the construction contractor under BOT mode.
On April 21, 2011, Electricite du Laos (EDL), Sinohydro and China Development Bank signed financial cooperation agreements for the project.
In August 2011, Nam Ou River Basin Hydropower Co. Ltd was set up, in which Sinohydro holds 85% of shares; EDL holds 15% of shares.
In September 2011, the Feasibility Study Report (FSR) was presented in the consultation meeting with GoL and on September 26, 2011, the final approval towards the FSR was obtained.
China Development Bank will fund the seven hydropower plants built on the Nam Ou River in Phongsaly and Luang Prabang Provinces.
On October 1, 2012, construction works commenced.
In August 2015, construction work on Nam Ou 2 dam, Nam Ou 5 dam, and Nam Ou 6 dam was completed 78.3%, 89.5% and 80.1% respectively.
On August 31, 2015, China Electric Power Construction Group Co., Ltd signed a franchise agreement and power purchase agreement (PPA) for the second phase.
In November 2015, Nam Ou 2 dam commenced operations with an installed capacity of 40 MW.
In April 2016, construction works on the first phase of the project were completed.
On April 28, 2016, construction work on the second phase of the project commenced with completion scheduled by 2020.
The project involves the construction of seven hydroelectric power plants with a total capacity of 1,272MW on Nam Ou River in Phongsaly and Luang Prabang provinces of Laos.
The US$2,800 million project includes the following:
1. Construction of three dams with 540MW under the first phase
2. Construction of four dams with 732MW under the second phase
3. Construction of a reservoir
4. Construction of seven hydro power plants
5. Construction of substations, access roads
6. Construction of powerhouses
7. Installation of turbines
8. Installation of transformers
9. Installation of generators
10. Laying of transmission lines
Reasons To Buy
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Monitor the latest project developments.
Identify key project contacts.
Publisher Name : Timetric


Metro Vancouver is planning to construct the Annacis Water Supply Tunnel deep under the Fraser River between the City of New Westminster and the City of Surrey. The project will include deep, vertical shafts constructed on both sides of the river with a 4.5-m diameter, 2.3-km long tunnel between the shafts. A 2.6-m diameter steel water main will be installed inside the shafts and tunnel and connected through new underground valve chambers to allow connection to the GVWD water transmission system. The project will provide increased capacity to meet future demand, and is designed to withstand river scour and remain operational during and following a major earthquake.
The project is currently in the detailed design stage which is expected to be completed by the end of 2019. The procurement for the construction phase of the Project is planned from January through July 2020. Construction is expected to start in late summer 2020 and will take approximately 5 years to complete.
Construction management services are required to oversee the project team and the contractor with the goal of effectively managing the schedule, budget and technical requirements. The construction management consultant will implement comprehensive project controls to effectively manage schedule, cost, scope, quality, risk, safety and environmental matters. Some of the key construction management services include performing contract administration duties, monitoring and documenting daily construction progress, managing and tracking submittals and requests-for-information, administering and advising the Corporation on change orders, managing the risk assessment, and assisting with claims and dispute resolution.
McMillen Jacobs Associates is familiar with recent soft ground tunneling projects in the Vancouver area, including detailed design and construction engineering phases for Metro Vancouver’s Port Mann Water Supply Tunnel (completed) and Second Narrows Water Supply Tunnel (construction in progress).
Source: Metro Vancouver website


The Fort Frances generating station (GS), owned and operated by H2O Power Limited Partnership (H2O Power), is located in Fort Frances, Ontario. The dams control the water level of Rainy Lake which flows into Rainy River, the boundary between Canada and USA.
This project will restore full operability of all 15 gates on the Fort Frances Dam, including 10 Main Dam gates and 5 Canal gates. On completion of the overhaul of each gate, leakage should be substantially eliminated.
At A Glance
Project Name: H2O Power Dam Rehabilitation
Role in Project: General Contractor
Client: H2O Power Limited


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Issued by NWS Memphis, TN
FGUS84 KMEG 301051
NATIONAL WEATHER SERVICE MEMPHIS TN
551 AM CDT Thu Mar 30 2017
Water levels can be expected to rise on the Buttahatchie River and Tombigbee
At 5 AM Thursday, the stage on the Tombigbee River at Bigbee was 9.7
feet and rising. The river is forecast to crest just below flood stage on Friday afternoon. Flood stage is 14 feet. At 14 feet, flooding of
low lying agricltural land occurs.
At 5 AM Thursday, the stage on the Buttahatchie River near Aberdeen
was 10.4 feet and rising. The river is forecast to crest near 12 feet Friday evening. Flood stage is 13 feet. At 13 feet, low land near the river floods.
The next River Statement will be issued later this morning, or sooner if
For graphical river and flood information, please go to
www.weather.gov and click near Memphis on the map. Then select Rivers
and Lakes AHPS under current conditions.
Stay tuned to your weather radio and your local news media for the
latest river information.


• River: Chattahoochee River
• Length: 525 Miles
• Surface Area: 25,864 Acres
• Volume: 604,527 Acre Feet
• Drainage Area: 3,440 Square Miles
Surrounded by deep forests and rolling fields, West Point Lake extends 35 miles along the Chattahoochee River on the Alabama-Georgia state line. The lake's 500 miles of shoreline provides excellent opportunities for fishing, camping, boating and other recreational activities.
The construction of West Point Dam was authorized by the Flood Control Act of 1962. Congress authorized the project for flood control, hydroelectric power, navigation, fish and wildlife development and general recreation.
West Point Dam controls flooding of the river by managing seasonal variations in water flow. The project provides water storage for navigation on the Apalachicola-Chattahoochee-Flint Waterway, running 260 river miles from Apalachicola, Florida to Columbus, Georgia. The powerhouse's three generators produce enough power yearly to serve 24,000 homes.


Europe’s first variable speed unit has been commissioned at the Goldisthal pumped storage power plant in Thuringia, Germany. It is one of two such units installed at the plant, together with two fixed speed units.
Pump turbines, rated at 265MW each, were supplied by Voith Siemens Hydro in consortium with VA Tech Hydro and CKD Blansko Engineering, with Voith taking responsibility for the hydraulic design and the control system, including the variable speed technology.
The unit’s rated speed of 333rpm over an operating range of -10% to +4% is automatically controlled by the turbine governor. Electricity generation during turbine mode and operation during pumping mode can be adapted to individual load conditions in the grid. Pumping mode within the 170–300MW range, says Voith, can be regulated with little changes in speed.
Variable speed control means that power input during pumping can be controlled continuously and efficiency in turbine part load ranges improved. Start up of the turbine is faster and there is smoother operation for the complete unit compared to fixed speed units. This makes variable speed beneficial to overall unit performance and also flexibility of operation within grid regulation, says Voith.
The Goldisthal scheme is to reduce peak load deficits and to provide a minute reserve for the loss of larger power station blocks in the Vattenfall grid.


2003 Volume 47 Pages 1219-1224
To solve the water quality problems in the Lake Nakaumi and the Lake Shinji, it is necessary to make clear the characteristics of flow and water level variation in these two lakes. Flows in these two lakes are dependent on each other, because these two lakes are connected by the Ohashi River. We have to investigate flows in the Lake Nakaumi, the Lake Shinji and the Ohashi River together.
We compared meteorological external forces, the water level variation and the flow of the Lake Shinji with those of the Lake Nakaumi. We made clear the propagation mechanism of water level variation in the Lake Nakaumi, the Lake Shinji and the Ohashi River, respectively, by calculating time lags of water level variations in many observation points. Furthermore, the propagation mechanism of water level changes by wind set up was also investigated.


Client: Kalehan Energy
Status: In Progress
Installed Capacity 190 MW
Gözeler – I HEPP, Gözeler – II HEPP and Gözeler – III HEPP are run-of-the river type hydroelectric facilities which will be constructed over the Murat River. They are placed from upstream to downstream as Gözeler – I HEPP, Gözeler – II HEPP and Gözeler – III HEPP respectively and the planning studies are ongoing.
At the upstream of these projects, Lower Kaleköy Dam, Upper Kaleköy Dam, Alpaslan – II Dam and Alpaslan – I Dam are located. From these projects, only Alpaslan – I Dam is in operation. At the downstream of Gözeler Projects, Beyhan – I Dam, Beyhan – II Dam and Keban Dam are located. Keban Dam is in operation.
Although there are several reservoirs in the upstream, because of the excessive flood potential of Murat River, spillway design discharges will be also very big. The fill body of the projects planned in the formerly feasibility report, were changed by Prosem Engineering and designed as RCC (Roller Compacted Concrete) body. By this means the spillway design discharges were reduced from probable maximum flood (9162 m3/s) to Q500 (4200 m3/s). Spillway design discharges were determined according to memorandum of State Hydraulic Works (DSİ).
By taking the advantage of the long axis and the downstream and upstream project belonging to Kalehan Energy also, the spillways of these projects were designed as uncontrolled. Thus, there will be no need of dozens of spillway gates.
Since the low head and high flow characteristics of these projects, Bulb turbines were preferred. The streambed levels at the downstream of the projects have been lowered up to 8 – 10 m resulting in a drop in the tailwater levels. In this way, the amount of agricultural lands laying under water is reduced and the negative social effects and expropriation costs are minimized.


Epic Engineering assisted Ashley Valley with the design and implementation of their new Storm Water Master Plan. Our team conducted the permitting, modeling and mapping for the system. This included detailed analysis of soils, geology, historic stream flows and channel flows.
As part of the Storm Water Master Plan, our team modeled the existing and future 10, 25, 50, 100 and 500-year flows and velocities. Our analysis included recommended improvements and population projection analysis, as well as detailed analysis of the existing storm drain system and future storm drain capacities.


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Bujagali first 50MW ready in Oct
German Team Inspects Equipment at Bujagali Uganda
Monday, 14th February, 2011
THE River Nile will for the second time in three years undergo a landmark diversion as construction of the 250MW Bujagali Hydropower project gets into its final stage.
Top Bujagali Energy officials, the major sponsors of the multi-billion project, said the diversion that begun yesterday would involve the blocking of the east waterway of the river to allow works commence on the right and final embankment.
“The west channel, which has been closed to river flow for the past three years to permit the construction of key structures, will be opened, while the east channel will be blocked upstream and downstream,” Bill Groth, the construction manager, said.
He noted that the water deflection activities that will take place for several weeks will eventually divert the entire river waters through the newly-constructed concrete spillway.
Once the river is diverted, the final phase of the construction will be achieved.
The river was first diverted in September 2007 to create a dry channel where the powerhouse would be erected.
About 90% of the structural concrete on the powerhouse has been completed, while almost all the required electrical mechanical equipment (98%) for it have been delivered on site, Groth said.
He described this as a “milestone” in the construction of the hydroelectric power project which is expected to double the generation capacity and reduce dependency on the costly thermal generation.
“This is an important phase because the powerhouse where the turbines are being installed is also approaching completion.
“We expect the first unit generation of 50MW around October, which again is a milestone in this project,” Groth disclosed.
He added that after the first unit goes online, the remaining four units of 50 MW each will be commissioned consecutively after thorough tests.
The project is expected to be fully commissioned by April 2012.
Groth revealed that 75% of the total project is complete with 95% of the switchyard civil works done and 75% of the electromechanical works accomplished.
Groth urged rafters, kayakers, boaters, swimmers, fishermen and tour operators using the Upper Nile River to avoid the diversion area as the river flow will be highly turbulent and unpredictable during the water diversion.
“After February 15, it will not be possible to travel down the river past the project site.
“For safety reasons, we advise all users to exit the river well upstream of the diversion area,” he said.
The deputy construction manager, Kenneth Kaheru, allayed fears that rafting, which is popular with tourists, would come to a complete end with the river diversion.
He said the rafting activities would move to downstream at the Kalagala offset which is being developed as a recreation and tourist attraction.
By Frank Mugabi The New Vision Newspaper


In 2012, Sulzer introduced the XJ series of submersible dewatering pumps with high hydraulic performance, increased wear resistance and high-efficiency motors. The new XJ 900 is a performance range extension of the XJ series pumps.
The new pump is equipped with a high-efficiency electric motor rated 90 kW for 50 Hz markets and 108 kW (145 hp) for 60 Hz markets. The high-efficiency IE3 motor and new hydraulics combined with low-friction bearings reduce power losses. As a result, the total energy costs are low.
The hydraulic design allows for easy conversion between high-head and high-flow configurations. This makes it possible to stock fewer pumps and still have the right hydraulic performance for the job.


Wafer type check valve is one of most widely used check valve, which is installed in vertical or horizontal pipelines to prevent the back flow of the medium. Here are three model No for wafer check valve, they are H71 wafer type check valve, H74 wafer check valve, and H76 wafer type check valve, and today we are going to discuss details about each of them:
H71 wafer check valve:
H71 wafer check valve is also called lift wafer check valve, among the Model No, code 1 indicates the straight through flow channel and lifting valve disc, and the valve disc moves up and down along the center position. Due to the short closing stroke of the valve disc, and the spring loaded, the closing speed is fast, which can significantly reduce the water hammering phenomenon.
In terms of installation method, H71 lifting wafer check valve can be installed vertically or horizontally, preferably vertical installation is the best; when installing, pay attention to the arrow direction on the valve body.
The options for valve body material are 201,WCB, 304, ductile cast iron,etc.
H74 wafer check valve:
H74 wafer check valve is also called single door swing wafer check valve, disc type check valve, is a thin design. The single door swing wafer check valve is light in weight, easy to install, usually installed in horizontal pipelines. When the valve flap is open, the passage channel is full open for the medium flow.
The material options for H74 wafer check valve are WCB, 304,316,etc. There are soft seal single door swing wafer check valve and hard seal single door swing wafer check valve.
H76 wafer check valve:
H76 wafer check valve is also called butterfly type check valve, double door wafer check valve. There are two spring loaded discs(two half discs), suspended on a central vertical hinge pin, when the flow rate slows down, the torsion spring automatically reacts, making the disc close to the valve seat, which reduces the closing stroke and the closing time.
When the fluid flows back, the valve disc gradually approaches the valve seat, and the dynamic response of the valve is greatly accelerated. This reduces the effects of the water hammer, resulting in crash-free performance.