Grizzly | Model: H7771
Hydraulic Milling Vise
Grizzly H7771 - Hydraulic Milling Vise
Utilize hydraulic pressure to maximize clamping force up to 45kN. A built-in hydraulic chamber with valve and handle generate tremendous pressure. Includes pressure gauge, clamping bolts, handle extension and handle. Jaw width is 6", jaw height is 2 1/16" and maximum jaw opening is 12 19/32". Approximate shipping weight: 129 lbs.
Animation for H7771


2016 Volume 29 Issue 12 Pages 535-543
In this paper, the liquid level control of separator in an ocean thermal energy conversion (OTEC) experimental plant with Uehara cycle is considered. A liquid level model of separator is constructed based on not only experimental data about the characteristics between the liquid level and the valve opening but also simulations using a stochastic model. The control system for the liquid level control of separator is designed by employing the LQG control theory. The usefulness of both the liquid level model and the control system is confirmed through simulations.


Electric submersible pumps are multistage centrifugal pumps operating in a vertical position. Liquids, accelerated by the impeller, lose their kinetic energy in the diffuser where a conversion of kinetic to pressure energy takes place. This is the main operational mechanism of radial and mixed flow pumps.
The pump shaft is connected to the gas separator or the protector by a mechanical coupling at the bottom of the pump. Fluids enter the pump through an intake screen and are lifted by the pump stages. Other parts include the radial bearings (bushings) distributed along the length of the shaft providing radial support to the pump shaft. An optional thrust bearing takes up part of the axial forces arising in the pump but most of those forces are absorbed by the protector’s thrust bearing.
Mid-American Pump carries a strong line of submersible pumps.


Wilo PB-400 EA
Single-stage booster pump PB-400 EA in Inline version. The device is used when it is necessary to increase the pressure in the housing sector, in suction mode and in the mode of supplying water from a tank on the roof.
The pump has an automatic mode of operation, which is possible with the help of a flow control device and a pressure tank that are built in. In addition, there is a pressure switch in the SEA version. Pumping of media with high flow temperatures is available, and the condenser and motor protection switch are already built into the pump. The equipment is supplied without cable and mains plug.
The pump has the European certificate of conformity CE.
Pump Series PB Type surface Surface pump type main Surface pump type to increase pressure Water quality pure Pump body material Gray cast iron Additional functions overheat protection Max head 20 m Max Flow 4.5 m3/h Power consumption 550 W Current consumption 2.8 А Maximum allowable pressure in the system 5 bar Network connection 1~220 V, 50 Hz Insulation class V Degree of protection IP X4


Water Pump Motor
The pump is with peripheral impeller containing numerous radial blades in its edge. The particular shape of the blades rapidly transfers radial re-circulation motion to the fluid on entry to the pump, between the impeller blades and the double channel, machined on each side of the pump body. They have various appearances and motor shells to the different operating requirements. They are reliable, economical and simple to use.


Brownville Dam, west Maine
Pleasant River Dam is impounded by Brownville Dam on the Pleasant River in Piscataquis County, Maine. Construction was completed in 1900. It has a normal surface area of 6 acres. It is owned by Elements Power Company/P C I Group Inc.
Brownville Dam, also known as Pleasant River Dam is concrete, timber crib, a gravity dam. Its length is 150 feet. Its capacity is 25584 acre feet. Normal storage is 336 acre feet. It drains an area of 300 square miles.
Lakes, Dams, and Recreational Facilities Near Brownville DamMilo Schoodic Lake Ebeemee Lake Boyd Lake Silver Lake Snows Pond Seboeis Lake East Davee Brook Dam Dunham Brook Dam Upper Dam Browns Mill Dunham Brook Site # 2 Dam Davee Brook # 1 Dam Sebec Lake Big Houston Pond Branns Mill Dam Indian Pond Old Farm Pond Water Control Endless Lake Lake Onawa Manhanock Pond Wassookeag Lake Carlton Stream Dam Run Around South Branch Lake Flatiron Pond First Davis Pond Little Mattamiscontis Lake Guilford Dam Long Pond Cedar Lake B Pond Mahanock Pond Howland West Enfield Garland Pond Manhanock Pond Upper Jo-Mary Lake
Bookmark this lake location.
Find other west Maine area lakes and vacation ideas or return to the home page.
Other AreasClick the map to see lakes in other parts of the country.


Irrigation, fire fighting, pumping water uphill to tanks, washdown, high volume spray applications, sheep drenching plants (twin impellor pumps recommended)
When water (or any other fluid) flows through a pipe, the pressure continuously drops in the streamwise direction because of friction along the walls of the pipe. It is common to express this pressure drop in terms of an irreversible head loss. Calculating this loss is fundamental to the design of any pipeline system.
Click here to be directed to the online friction loss calculator.


Bonneville Surface Flow Bypass System
Contract Amount: $31,990,000
Joint Venture: Kiewit Pacific/ Manson
Location: Columbia River, North Bonneville, WA
Project Duration: 08/2002-12/2003
This joint venture project involved constructing a bypass channel at Bonneville Dam intended to increase the survival rate of juvenile migrating fish.
The work on the new open flow channel included rock removal, excavation and the underwater placement of precast concrete elements and tremie underwater concrete fill. The finished product was a 3,000-foot-long, high-velocity concrete chute, with 25-foot-high walls, that safely transports fish through the powerhouse and into the new channel outfall.
This project won an Excellence in Concrete Award from the Oregon Concrete and Aggregate Producers Association and received an “Outstanding” Performance Evaluation from the U.S. Army Corps of Engineers, Portland District.


HA. Dhidhdhoo Harbor Extension & Jetty Construction Project is currently underway with 61% project completion. Quay wall construction has been completed, and revetment profiling works have reached 81% completion. Additionally, harbor pavement installation works have reached 77% completion, and new harbor basin dredging operations have reached 85% completion.
Scope of works include Dredging & Excavation operations of 78,000cbm, construction of a 378m breakwater, construction of 58m Groynes; 478m revetment; 630m quay wall, construction of 6,858sqm harbor pavement, a jetty, and supply and installation of navigation and harbor lights.
This project is valued at MVR 74.8 million.


Brazzaville - Congo
Ministry of Public Works – Congo (in collaboration with Salini Costruttori S.p.A.)
1976 - 1977
Description for Djoué Hydropower (Congo)
Djouè river hydroelettric plant (tributary of Congo).
Existing plant characteristics:
- Reservoir ( V = 8 Mm³ )
- Installed capacity ( IP = 14 MW )
- Max gross head ( H = 25 m )
- Max turbine discharge ( Q = 72 m³/s )
- Raising of the weir
- New surge tank
- Enlargement of existing power house
Upgraded plant characteristics:
- Reservoir ( V = 18 Mm³ )
- Installed capacity ( IP = 30 MW )
- Max gross head ( H = 27.5 m )
- Max turbine discharge ( Q = 150 m³/s )
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Installation methods of different check valves
1. Swing check valve: The disc of the swing check valve is disc-shaped and rotates around the shaft of the valve seat passage. Because the passage in the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for large-diameter occasions with low flow rate and infrequent changes in flow, but it is not suitable for pulsating flow, and its sealing performance is not as good as that of lifting type.
2. Lifting check valve: a check valve whose disc slides along the vertical centerline of the valve body. Lifting check valves can only be installed on horizontal pipelines. For high-pressure small-diameter check valves, the disc can be made of balls. .
3. Disc check valve: a check valve in which the disc rotates around the pin shaft in the valve seat. The disc check valve has a simple structure and can only be installed on the horizontal pipeline, and the sealing performance is poor.
4. Pipeline check valve: a valve in which the valve disc slides along the centerline of the valve body. Pipeline check valve is a new valve. It is small in size, light in weight and good in processing technology. It is one of the development directions of check valve.
pump parts Butterfly valve


28 Jones Rd, Brooklyn is a container stacking yard comprising of 50,000sq.m. of concrete hardstand capable of storing 8500 shipping containers.
As part of the project, the delivery of extensive Melbourne Water drainage infrastructure was required. This included the construction of two large scheme drains up to 1900mm in diameter, the upgrade of the heritage listed Main Outfall Sewer (MOS) and the construction of a sedimentation pond to treat stormwater flows prior to discharging into the Kororoit Creek.
A key element of the project involved converting the abandoned MOS into a Melbourne Water stormwater drain. This involved extensive investigations into the rehabilitation of the 130 year old MOS, consultation with Melbourne Water and Heritage Victoria.
Cadence Property Group


Detailed explanation of the 6 major components of pipel […]
Detailed explanation of the 6 major components of pipeline centrifugal pumps
The six major components of the pipeline centrifugal pump are the impeller, pump body, shaft, bearing, seal ring, stuffing box. As the six basic components of the pipeline centrifugal pump, what is its structure and characteristics? The following will tell you one by one:
1. The impeller is the core part of the centrifugal pump. It has a high speed and high output. The blades on the impeller play a major role. The impeller must pass the static balance test before assembly. The inner and outer surfaces of the impeller are required to be smooth to reduce the frictional loss of water flow.
2. The pump body is also called the pump casing, which is the main body of the water pump. It plays a supporting and fixing role and is connected with the bracket on which the bearing is installed.
3. The function of the pump shaft is to connect the motor and the motor by a coupling, and transmit the torque of the motor to the impeller, so it is the main component for transmitting mechanical energy.
4. The bearing is a component that is sleeved on the pump shaft to support the pump shaft. There are two types of rolling bearings and sliding bearings. Rolling bearings use butter as a lubricant. It should be appropriate. Generally, the volume is 2/3 ～ 3/4. Too much volume will generate heat, too little and there will be noise and heat! The plain bearing uses transparent oil as the lubricant, and refuel to the oil level line. Too much oil will leak out and drift along the pump shaft, and too few bearings will overheat and burn out to cause an accident! During the operation of the pump, the temperature of the bearing is superiorly high at 85 degrees and generally runs at about 60 degrees. If it is high, find the cause (whether there are impurities, whether the oil is black, and whether water has entered) and handle it in time!
5. Sealing ring is also called leakage reducing ring. The excessive clearance between the impeller inlet and the pump casing causes water in the high-pressure area of the pump to flow to the low-pressure area through this clearance, affecting the water output of the pump and reducing the efficiency! Too little clearance will cause friction between the impeller and the pump casing and cause wear. In order to increase the backflow resistance and reduce the internal leakage, and delay the service life of the impeller and the pump casing, a seal ring is installed at the inner edge of the pump casing and the external assistance of the impeller, and the sealed gap is preferably maintained between 0.25 and 1.10mm.
6. The stuffing box is mainly composed of stuffing, water seal ring, stuffing tube, stuffing gland and water pump sealing tube. The function of the stuffing box is mainly to close the gap between the pump casing and the pump shaft, and to prevent the water in the pump from flowing to the outside and the outside air from entering the pump. Always keep the vacuum inside the pump! When the pump shaft and the filler produce friction to generate heat, it is necessary to rely on the water seal tube to hold the water into the water seal ring to cool the filler! Keep the pump running normally. Therefore, special attention must be paid to the inspection of the stuffing box during the running inspection of the pump! The packing needs to be replaced after about 600 hours of operation.


St. Bernard Parish officials recently broke ground on construction of the new Jacks Canal pump station near Delacroix.
President Craig Taffaro said the project promises to offer improved tidal flooding protection when construction is completed. The project will cost $438,000.
A temporary pump will remain operational until the new station is completely rebuilt in about five months, the parish government said in a news release.
The new pump will have a pumping capacity of 3,500 gallons per minute. In addition to the pump the project includes a diesel engine and related facilities, the news release said. Also, the diesel engine and related facilities will be raised about 16 feet higher than the facilities damaged by Hurricane Katrina.
The station was designed by Evans-Graves Engineers, Inc., and will be constructed by Sopena Corporation.


Pumping Solutions > Submersible
– The best solution for pumping manure from deep pits.
– Economical Pumping Solution
– Direct powering of fan blades from the motor shaft, therefore minimum mechanical losses and high pumping efficiency
– Reduced risk of problems due to long fibres in the pit due to the efficient cutter knives at the pump inlet


The valve body is made from forged brass and the handle is stainless steel. It has the "soft opening" feature and has been tested at pressures over 1000 psi. The valve has an inlet and outlet of 1/8" FNPT. The seal for this valve is Teflon and can be repaired easily.
WestPak USA Brass Offset Valve -200 OS detail valves.1200 PSI pressure rated. Universal design, fits PMF, Pro-chem, Kingston, CDI, and CMP.


This project is located in Kinta River between Bridge Street Lim Boo Seng and Jalan Sultan Idris bridge in Ipoh city. The construction of "inflatable rubber dam" this is as a control structure policies and at the same time raising the water level of the Kinta River as high as 2 meters. The construction of this structure which is controlled automatically can control the water level in order to enhance the potential of water recreation at the Kinta River. The construction of the "rubber dam" will also improve environment in the city and add another location for recreation to the citizens of Ipoh.
Contract cost: RM 3,825,208.00 (Actual RM3, 838, 295.42)
No. Project: JPS/c/PK/SG/3/2009
Contractor: Solid Hope Enterprise
Start date: 16.7.2009
Date of completion: 21.4.2010 (Actual 20.7.2010)


- Apex 32mm "Big Boy" Pump Buddy Valve
- Pump fed large storage tanks and/or reservoirs - It allows for a single level or variable minimum and maximum water levels.
- Mains/Gravity fed large storage tanks and/or reservoirs - It allows for a single level or variable minimum and maximum water levels.
- Rain Harvesting - as a back up water supply control valve, in the event of demand exceeding rainfall.
- Full on, full off
- Enormous flow rate 1500 L/min at 1200 kPa
- Extremely high volume water inlet control device.
- Soft closing, no water hammer
- Long tail, no tank fittings (thin walled tanks)
- Adjustable water levels saves electricity & increases pump life
- Can be adjusted for use as a top up Rain Harvesting valve (by clipping weights together)
- Diaphragm activated - Full Flow Valve.
- No float switches, no power required (pump requires pressure switch)
- Less parts = Less problems
- Patented self cleaning mechanism to minimise blockages.


The river’s crest was significantly reduced over the weekend. The Mississippi River crested at 15.41 FT on Sunday, September 9 and is expected to drop to 14 FT by Sunday, September 16
at this time.
The current river level is 15.41 FT.
Based on the current river level and crest projection, the following flood impacts and measures have been or will occur in the coming days.


024 73 016 618
FLOWSPEC HQ41X slide ball type check valve adopts steel coated with rubber ball as its disc, which will roll up and down in the valve flow in the effect of fluids, achieving the valve open and close. Its sealing is very good, and it is silent close without water hammer. HQ41X slide ball type check valve adopts full bore design, which makes it have big flow, small resistance, small head loss which is 50% smaller than that of swing type.
HQ41X slide ball type check valve can be mounted vertically or horizontally on the pipeline of cool water, hot water, industrial and domestic sewage system; HQ41X slide ball type check valve is more applicable to submersible sewage pump.


Hydraulic Torque Pumps
The HTL Hydraulic Torque Pump is a lightweight and portable solution which has been designed to be user-friendly ensuring ease of use for the operator whilst offering maximum efficiency.
With a maximum operating pressure of 10,000 psi / 700 bar and a precision pressure regulating valve HTLs range of torque pumps can be used with most leading brands of hydraulic torque tools.
Incorporating a compact solenoid valve system, protective frame and precision calibrated pressure gauge the HTL Hydraulic Torque Pump can be supplied with a multi-tool manifold allowing up to four tools to be used simultaneously ensuring equal parallel closure of flanges and joints, alternatively the pump can be supplied with a single tool manifold.
Features and Benefits
- Single tool or multi-tool models available
- Solenoid valve system
- Protective frame design
- Robust hand control
- Precision calibrated pressure gauge
- Oil level sight glass
Each pump comes complete with:
- Full calibration certificate
- Letter of Conformity
- Spare parts list
- Operating instructions
- HTL Pro-46 Hydraulic Oil
- Twin line hose assembly (custom lengths available)
Compact and Efficient Solution
These recent innovations offer a very compact and efficient solution. A brand new valve system which replaces the old temperamental shear seal system
eradicates downtime giving the pumps a far greater life cycle increasing performance, durability and efficiency.
User Friendly and Portable
Each pump is user friendly and portable, incorporating an ergonomically designed carrying frame and four quick connect ports to enable up to 4 torque wrenches to be operated simultaneously, even in the harshest environments.


The Indian River Lagoon, home to more than 3,000 species of plants and animals, is considered the most biologically diverse estuarine system in the continental United States. The C-44 Reservoir and Stormwater Treatment Area is the first component of the multi-billion dollar Indian River Lagoon-South (IRL-S) project, part of the Comprehensive Everglades Restoration Plan (CERP).
Construction is underway on multiple components of the C-44 Reservoir and Stormwater Treatment Area (STA) project in Martin County, Fla. The C-44 project includes the construction of a 3,400-acre reservoir, a pump station with a capacity to pump 1,100 cubic feet per second (cfs) of water, and 6,300 acres of STAs.
All project components were originally planned to be built by the U.S. Army Corps of Engineers but, in an effort to construct the project as expeditiously as possible, local sponsor South Florida Water Management District (SFWMD) has awarded construction contracts for the constructing the pump station, STA, and system discharge canal.
After construction is completed, the project will capture local runoff from the C-44 basin, reducing average annual total nutrient loads and improving salinity in the St. Lucie Estuary and the southern portion of the Indian River Lagoon by providing, in total, 60,500 acre-feet of new water storage (50,600 acre-feet in the reservoir and 9,900 acre-feet in the STAs) and 3,600 acres of new wetlands.


Flood Mitigation Projects
When County Executive Ball took office, there were already several projects underway that will increase the watershed's retention capacity and will improve water conveyance. With the exception of the construction and design of the Lower Main Street open space, these upstream projects already in the pipeline are continuing to move forward as scheduled at this time. The Ball Administration is continuing to examine alternatives to full-scale removal of the buildings on the lower end of Main Street, as well as additional opportunities for stormwater projects throughout the watershed.
Flood Mitigation Projects Map
(click map for additional information)


- Flood Warning issued October 22 at 8:19PM CDT until October 24 at 1:22AM CDT by NWS
- Effective: 8:19 p.m. on Sunday, Oct. 22, 2017
- Expires: 1:22 a.m. on Tuesday, Oct. 24, 2017
...The Flood Warning continues for the following rivers in
Blackwater River at Valley City affecting Johnson and Pettis
Blackwater River near Blue Lick affecting Cooper and Saline
South Grand River at Urich affecting Bates...Cass and Henry
Big Creek at Blairstown affecting Cass...Henry and Johnson
The Flood Warning continues for
The Blackwater River at Valley City.
* until late Monday night.
* At 7:00 PM Sunday the stage was 22.9 feet.
* Flood stage is 22.0 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue to fall to below flood stage by
early Monday morning.
* At 22.0 feet...Woodlands and farm fields along the river begin to
Location FS Stage Day/Time Forecast
Valley City 22 22.9 Sun 07 PM 22.1 early Monday morning
- See more at NOAA


700WNQ Underwater Dredging Pump
Range of Performance
Discharge diameter: 700mm
700WNQ dredging pump is 700mm size horizental Centrifugal Slurry Pump.The structure of the pump is single stage, single suction, and centerline suction.
These series Submersible Dredging Pumps adopt single pump casing structure,in order to reduce the pump weight, easy to lift and move.
The pump is installed on a special underwater frame on the side of the ship, which can be directly connected with the submerged motor,also can be connected with the ship’s motor or electormotor through the long shaft.
According to the connecting way of gear box can provide two kinds of typical structures, one is connected with own bearing bracket, the other is combined with reduction gear box.
The submerge Slurry Pump can meet the requirement of working in single pump and two pumps in series.
The pump can realize the variable-speed performance at multi working condition points with the fine self-priming, wear resistance, smooth operation, low noise and convenience for overhaul and hoisting. It is equipped with the self-supply seal water system with sand filter and lubricating system and has a long service life and durability.
700WNQ is suitable for dredging and filling operations of cutter-suction dredger and trailing suction dredger. It is also used for river sand mining and mining vessels.


Bonacci Infrastructure delivered the structural and civil design packages for upgrades to the existing Sunbury Recycled Water Plant. Structural works included a new 33 x 12 metre membrane tank, inlet works, bunded chemical storage and dosing areas, pump station, electrical switchroom and odour control facilities.
Bonacci Infrastructure also delivered the structural design for extensive modifications to the existing sedimentation tanks to enable them to be repurposed as a bioreactor. These tanks, which were originally constructed in the 1970’s, were in poor condition and suffered from joint failure, corroded reinforcing and areas of compromised concrete integrity.
Bonacci Infrastructure completed a series of condition assessments on the existing structures and provided comprehensive advice on the remedial works required to achieve the Client’s nominated design life.
Civil works completed as part of the project included bulk earthworks, stormwater and site drainage, and civil pavements.
Bonalbo Multi Purpose Service Health Facility
New South Wales Health
Ergon Energy Glenmore Road Depot


HYDAC’s facility in Enschede develops diesel-driven Hydraulic Power Packs to power rotative as well as linear equipment.
This hydraulic system is used as a power source for operating winches, cylinders or rotating actuators, for example. The most crucial reason to choose this multipurpose unit, is the capability to be used in various energy consuming applications. The HYDAC standard hp control function prevents excessive power demands from your Power Pack.
HYDAC power packs can be installed, commissioned and maintained on site.


The Navigation and Ecosystem Sustainability Program comprises projects on the Upper Mississippi River and Illinois Waterway navigation system and lies within portions of Illinois, Iowa, Minnesota, Missouri, and Wisconsin.
The Upper Mississippi River navigation system extends from the confluence with the Ohio River, River Mile 0.0, upstream to the Upper St. Anthony Falls Lock in Minneapolis-St. Paul, Minnesota, river mile 854.0. The Illinois Waterway navigation system extends from its confluence with the Mississippi River at Grafton, Illinois, river mile 0.0, upstream to the T. J. O’Brien Lock in Chicago, Illinois, river mile 327.0. The System contains 1,200 miles of nine-foot deep channels, 37 lock and dam sites and thousands of channel training structures.
The Upper Mississippi River and Illinois Waterway ecosystem includes the river reaches described above, as well as the floodplain habitats that are critically important to large river floodplain ecosystems. The total acreage of the river-floodplain system exceeds 2.5 million acres of aquatic, wetland, forest, grassland, and agricultural habitats.


Furnas is a 1,216MW hydro power project. It is located on Grande river/basin in Minas Gerais, Brazil. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the project is currently active. It has been developed in a single phase. The project construction commenced in 1958 and subsequently entered into commercial operation in 1963. Buy the profile here.
The project is currently owned by Furnas Centrais Eletricas with a stake of 100%.
Furnas is a reservoir based project. Furnas underwent through rehabilitation & modernization during 2013.
The hydro power project consists of 7 turbines, each with 152MW nameplate capacity.
The project construction commenced in 1958 and subsequently entered into commercial operation in 1963.
The electric generators for the project were procured from Canadian General Electric and Siemens.
For more details on Furnas, buy the profile here.


Which is the largest dam in the world?
Which is the largest dam in the world depends on the criteria you take into account, such as the reservoir capacity, dam height, the volume of construction material, the installed powerplant capacity or the actual energy generation.
Based on the reservoir capacity, the Kariba Dam is considered to be the largest in the world. The Kariba dam is in Zambia, and has a reservoir capacity of 180,600 hm3.
Kariba Dam in Zambia (Source: Wikipedia)
The tallest dam in the world is under construction: the Rogun Dam on the Vakhsh River in Tajikistan is projected to be 335 metres tall.
Construction of the Rogun Dam in Tajikistan
Based on the volume of construction material, the Syncrude Tailings Dam is the largest dam in the world with 540.000.000 m3 of construction material. The Syncrude Tailings Dam is being built by compacting piled up dirt left over from mining operations, to make the structure as stable as possible.
Syncrude Tailings Dam and artificial lake in Canada (Source: Wikipedia)
Three Gorges Dam in China (Source: Wikipedia)
The Itaipu Dam is the first in the world in hydropower generation and is located on the border between Brazil and Paraguay, on the Paraná River. The Itaipu Dam has an installed capacity of 14,000 MW and produces about 98,000 GWh per year.
Itaipu Dam between Brazil and Paraguay (Source: Wikipedia)


The project consist of preparation of Detail project report (DPR) which comprises of feasibility analysis and execution plan for the construction of dam and recreational lake, Tourism Development and Management Plan, Spatial Development Framework for the Jiri Valley. The consultant has completed all the assignment as per ToR.
The proposed Jiri Dam and Artificial lake is located in Jiri Municipality of Dolakha District, Bagmati Province, Nepal. The project area can be reached through 188 km Kathmandu-Lamosangu-Jiri road. The Jiri Dam is Concrete Gravity Dam of 38 m height and 8 m top width and an Artificial Lake formed by the Dam will have reservoir surface area of 123,685.53 m2.


Hydraulic Pressure Gauges are used to check pressure in the hydraulic system. These are also used for precise measurement and recording of hydraulic tool pressures. These are suites for monitoring and controlling hydraulic systems. Each gauge has a pressure transducer, power transformer, cord and screwdriver, zero setscrew that easily adjusts to zero gauge as needed and solid state design without any moving parts.
Hydraulic Pressure Testers are compact systems designed to test catheter tubing and elastomer balloons in a wide range of sizes & materials. It features programmable test profiles, 2 x 40 back-lit LCD display and RS-232 & parallel ports. Hydraulic pressure testers perform a variety of high-pressure tests that require pressure cycles with a specific sequence & magnitude as well as accurate tracking & recording of time, pressure and balloon dimensions.


brief introduction of turbine flowmeter.
KF500 type turbine flow meter is a speed type flow meter. For the
measurement of full closed pipeline, a continuous flow of liquid volume
flow. Turbine flow sensor for measurement of low viscosity liquid, has
high precision, can withstand the working pressure and other
characteristics. Preamplifier differential pulse output, 4~20mA standard
current signal output type, ordinary type flow detector, wear resistant
and anticorrosive, which wear resistant except the bearing and the
shaft made of hard alloy ( 25mm caliber following bearings with Hong
Gangyu ), and the design of pair of impeller with appropriate reverse
thrust, which is more suitable for measuring gasoline lubricants the
poor performance of liquid.


Altaf Hamid Rao;
MIRPUR (AJK): As a result of melting of snow on the highest upper reaches of the snow-clad Himalayan Jammu Kashmir state and consequent increased flow of related rivers falling in the country’s largest AJK-based Mangla dam, the water level in the reservoir was reported as in rising form as the level of the water in the dam was reported 1109.60 feet on Tuesday as compared to 1107.10 feet recorded a day before on Monday, official sources said.
Minimum operating level of water in Mangla dam is 1050 feet with the maximum conservation level 1242 feet. Live storage capacity in the dam on Monday was reported as 0.490 MAF, the sources told this Correspondent here on Tuesday.
The overall position of the river inflows and outflows at Mangla, Tarbela, and Chashma along with the reservoirs levels and the barrages remained on Tuesday as under:-
Rivers: Indus at Tarbela: Inflows 166400 cusecs and Outflows 112100 cusecs, Kabul at Nowshera: Inflows 85300 cusecs and Outflows 85300 cusecs, Jhelum at Mangla: Inflows 40000 cusecs and Outflows 20000 cusecs, Chenab at Marala: Inflows 54800 cusecs and Outflows 31100 cusecs.
Barrages: Jinnah: Inflows 177100 cusecs and Outflows 171200 cusecs, Chashma: Inflows 173100 cusecs and Outflows 179000 cusecs, Taunsa: Inflows 138800 cusecs and Outflows 122300 cusecs, Panjnad: Inflows 3700 cusecs and Outflows Nil cusecs Guddu: Inflows 68900 cusecs and Outflows 56500 cusecs, Sukkur: Inflows 43700 cusecs and Outflows 14100, Kotri: Inflows 7000 cusecs and Outflows Nil.
Reservoirs (Level and Storage):
Tarbela: Minimum operating level 1386 feet, present level 1445.70 feet, maximum conservation level 1550 feet, live storage today 1.175 million acre feet (MAF).
Mangla: Minimum operating level 1050 feet, present level 1109.60 feet, maximum conservation level 1242 feet, live storage today 0.490 MAF.
Chashma: Minimum operating level 638.15 feet, present level 644.70 feet, maximum conservation level 649 feet, live storage today 0.117 MAF.
The inflows and outflows of River Indus at Tarbela and Chashma, River Kabul at Nowshera and River Jhelum at Mangla have been reflected as mean flows of 24 hours, whereas the other flows have been gauged at 6.00 a.m. on Tuesday, the sources added.


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Wilden, Diaphragm Pump model M2, 316 stainless steel, 1″ inlet & 1″ outlet, unit has a flow rate of 37 GPM with maximum pressure of 110 PSI.
Fristam, 10 HP Centrifugal Pump model FPX3551-220, stainless steel, 3″ x 2.5″ connections, 1750 RPM 230/460 volt
Sandpiper, Diaphragm Pump model SA3-A/HDF3-A, T316 stainless steel, heavy duty flap valve pump with 3″ flanged inlet & outlet ports, top infeed & bottom discharge, bolted on (remova...
Warren Rupp, Air Operated Diaphragm Pump model ST 1-A, type DVG-1-SS, stainless steel contacts with 1.5″ inlet & outlet with NPT connections, ball type check valves, Teflon diaphragm ...


Manadhoo Harbor dredging in full swing
The Maldives Transport and Contracting Company (MTCC) has just released the latest update on the Manadhoo Harbor development project.
According to the company, the channel dredging operations and breakwater construction works have reached 50 percent progress so far.
MTCC also revealed that the ramp construction work began recently and that the installation of the jetty column is at 52 percent completion.
Scope of works for the project will include:
- dredging and excavation operations of 29,038cbm;
- construction of a 195m breakwater;
- a 188m revetment;
- a concrete bridge;
- a ramp and installation of navigational aids.
The value of the project is MVR 30.3 million ($2 million).


Effect Of Structural Forms On The Performance Of A Jet Pump For A Deep Well Jet Pump
Free (open access)
257 - 266
C. H. Zou, H. Li, P. Tang, D. H. Xu
A deep well jet pump combines two principles of pumping; that of the centrifugal pump and that of the jet pump. The performance of the jet pump has an impact on the deep well jet pump directly, while previous studies on jet pumps have focused on the structure parameters, which ignored the effect of structural forms such as installation direction and the structural forms of the inlet. In this paper, three turbulence models were used to calculate a 3D single-phase flow field in the jet pump and the results were compared with the experimental data to validate the simulation. Numerical simulations in different gravity fields were carried out to seek the differences of the performance between the horizontal installation and the vertical installation of the jet pump. The optimum throat pipe length formulas were deduced from analysis of the simulation results. Three kinds of structural forms for suction inlet were compared by numerical simulation. The results showed that the efficiency of the vertical inlet was the highest, and some numerical results regarding flow fields and velocity distribution were shown and discussed.
deep well jet pump, optimum throat pipe length, gravity field, suction inlet


3" Full port easy-full valve. Poly material with a max pressure of 100 psi.
High quality valve from Banjo- 3" Full port easy-full valve
- Eliminates multiple fittings for fill applications
- Available in 2" and 3" sizes
- Full flow (full port) design
- Stubby valve configuration reduces profile
- Extended coupler prevents handle interference
- Maximum operating pressure 100 psi


06 Oct Work on Design and Build of L. Isdhoo Harbour is underway
Work on Design and Build of L. Isdhoo Harbour is underway, with overall 12% project progress. Dredging works for the project is currently ongoing, with 26% completion.
Scope of works for the project include dredging and excavation operations of 27,129cbm; the construction of a 230m quay wall; a 208m breakwater; 98m revetment, and 1,560sqm of paved area. The estimated value of the project is MVR 34.7 million. The project was awarded on 18th December 2019.


- Heavy-duty access cover
- Suitable for pump stations located under roads
- Made of ductile iron
HEAVY-DUTY ACCESS COVER
The heavy-duty access cover with frame is suitable for vehicle traffic and rated for installation on roads. It can carry a maximum load of 400 kN (40 tons).
The cover is made of ductile iron.
A special tool is used for opening the cover. Hinged covers have a safety catch to prevent them from closing accidentally. The cover surface is slip proof.
Wet Pit (P)
Semi permanent, submersible pump installation. Wet pit arrangement with the pump installed on twin guide bars with automatic connection to the discharge pipe.
Wet Pit (H)
Semi permanent, submersible pump installation. Wet pit arrangement with the pump suspended under the discharge connection. The pump is automatically connected to the discharge pipe.


Brattset power plant in Rennebu Municipality in Sør-Trøndelag County is part of the power plant system in the in Orkla watercourse.
Ownership: 48.6 %
Production: 400 GWh
Power: 80 MW
The plant is equipped with a Francis turbine with an installed capacity of 80 MW. Annual mean production is 400 GWh.
The power plant uses a gross height of fall of 273 metres from the intake reservoir Lake Storfossdammen down to the outlet into the Orkla River south of Berkåk. Water is also drawn from several stream intakes. The power plant was commissioned in 1982.
Brattset power plant is part of Kraftverkene i Orkla (KVO). TrønderEnergi Kraft is the operator of the power plant.


East Sugnet road project to begin Monday
A two-and-a-half-month water main replacement and road reconstruction project on E. Sugnet Road will begin Monday, June 16, weather permitting.
The first phase of the project will close E. Sugnet from St. Andrews Road to Swede Avenue for the water main portion of the project. A detour will be established to route motorists around the construction zone using St. Andrews, Hillgrove Parkway and Swede.
Once the water main is completed, the entire length of Sugnet from Washington Street to Swede Avenue will be closed to through traffic for street reconstruction.


Ohi is an 85.8MW hydro power project. It is located on Kiso river/basin in Gifu, Japan. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the project is currently active. It has been developed in multiple phases. The project construction commenced in 1922 and subsequently entered into commercial operation in 1924. Buy the profile here.
The project is currently owned by The Kansai Electric Power.
The hydro reservoir capacity is 29.4 million cubic meter.
Ohi (Ohi I) consists of 4 units of francis turbines.
Ohi (Ohi II) consists of 1 unit of francis turbine with 33MW nameplate capacity.
The project consists of 5 generators.
The project construction commenced in 1922 and subsequently entered into commercial operation in 1924.
For more details on Ohi, buy the profile here.


Needle Valves HP Series are the specially designed and ruggedly made valves, which can be used in the corrosive as well as hazardous surrounds. The valves are applicable for process control, flow control and instrumentation applications. These precision-engineered essentials allow for a fine control of flow. Needle Valves HP Series can be regulated with much ease and less effort. It precisely fits into its place and gives a smooth flow between plunger and seat. The flow rate can be controlled with precision. This is a less complicated valves system.


PWP No. 4446DS
Rehabilitation and Construction of Sewage Rising Mains (Package 1) – Ha Tsuen
Rehabilitation of about 1.9km of twin rising mains and construction of about 1.9km of a new rising main in Ha Tsuen
The construction and rehabilitation works will adequately improve the reliability of the concerned parts of the sewerage network.
Consultants Management Division
Sewerage and sewage treatment
Under planning & design


Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Mihail Popescu
Editorial: International Conference on the Hydraulics of Pumping Stations, Manchester,England,17-19 September,, p.77-88, 1985.
In the present paper a new protection system for pumping stations is proposed consisting of “air chamber provided with a special device generating asymmetric local hydraulic resistance” wwhich is able to reduce considerably and in certain conditions even to annihilate completely presure increases during hydraulic nonstationnary motions.
This new protection system has been applied in the design of more than 20 pumping stations in Romania,,most of them already in operation.The effect of this protection system on pressure increases in the pressure pipe is exhibited both by laboratory experimental studies and by hydraulic computations.
Cuvinte cheie: Sistem de protectie,soc hidraulic,Statie de pompare // Protection system,Waterhammer,Pumping station


Phased expansion for cost-effective improvements
Garver provided master planning, design, and construction phase services for a three-phased expansion of Trinity River Authority’s Mountain Creek Regional Wastewater System to 9 MGD. The first phase (4.5 MGD) focused on peak flow storage and expanding the treatment capacity of the aeration basins, while the second phase (6.0 MGD) included a new influent pump station, headworks screening and grit facility, RAS/WAS pump station, solids handling building, and expanding the treatment capacity of the existing processes. The final expansion phase (9.0 MGD) included a new aeration basin, final clarifier, gravity thickener, and expanded the treatment capacity of existing processes. The project team considered planned future improvements of each facility and identified any operational conflicts or interruptions that could occur during construction.


|A general analytical model for head response to oscillatory pumping in unconfined aquifers: effects of delayed gravity drainage and initial condition
Institute of Environmental Engineering
|Oscillatory pumping tests (OPTs) provide an alternative to constant-head and constant-rate pumping tests for determining aquifer hydraulic parameters when OPT data are analyzed based on an associated analytical model coupled with an optimization approach. There are a large number of analytical models presented for the analysis of the OPT. The combined effects of delayed gravity drainage (DGD) and the initial condition regarding the hydraulic head are commonly neglected in the existing models. This study aims to develop a new model for describing the hydraulic head fluctuation induced by the OPT in an unconfined aquifer. The model contains a groundwater flow equation with the initial condition of a static water table, Neumann boundary condition specified at the rim of a partially screened well, and a free surface equation describing water table motion with the DGD effect. The solution is derived using the Laplace, finite-integral, and Weber transforms. Sensitivity analysis is carried out for exploring head response to the change in each hydraulic parameter. Results suggest that the DGD reduces to instantaneous gravity drainage in predicting transient head fluctuation when the dimensionless parameter a(1) = epsilon S(y)b/K-z exceeds 500 with empirical constant epsilon, specific yield S-y, aquifer thickness b, and vertical hydraulic conductivity K-z. The water table can be regarded as a no-flow boundary when a(1) < 10(-2) and P < 10(4) s, with P being the period of the oscillatory pumping rate. A pseudo-steady-state model without the initial condition causes a time-shift from the actual transient model in predicting simple harmonic motion of head fluctuation during a late pumping period. In addition, the present solution agrees well with head fluctuation data observed at the Savannah River site. Highlights. An analytical model of the hydraulic head due to oscillatory pumping in unconfined aquifers is presented. Head fluctuations affected by instantaneous and delayed gravity drainages are discussed. The effect of the initial condition on the phase of head fluctuation is analyzed. The present solution agrees well with head fluctuation data taken from field oscillatory pumping.
|HYDROLOGY AND EARTH SYSTEM SCIENCES
|Appears in Collections:


Russian regulatory body Glavgosexpertiza has approved the design documentation and engineering survey results for the construction of new cargo handling facility at Taganrog Port.
The new facility that will be built in the area of the port’s Northern pier is expected to handle 270,000 tonnes of cargo per year.
The design document foresees the construction of a multipurpose facility intended for direct transshipment of grain.
The terminal will be built in two phases. The first one will include reconstruction of the Northern pier and construction of two cargo berths as well as installation of equipment and hydraulic engineering facilities.
Phase I also envisages installation of utility services and dredging at Berth No. 10 while dredging at Berth No. 11 will be conducted during Phase II of the project.
Design documentation for the project was developed by Transport Projects and Investments LLC and Sea Grain Terminal LLC.


Warning: Boise River Flows Set to Increase today
The U.S. Army Corps of Engineers and the Bureau of Reclamation are increasing flows through Boise from approximately 240 to 1,750 cubic-feet-per-second, beginning today
The flow on the Boise River through town will be increased 500 cubic-feet-per-second each day over three days starting on (Wed) March 21, 2018, and ending on (Fri) March 23, 2018.
This increase in flows is due the current snow-pack in the basin as well as good reservoir carryover from the 2017 season. These releases will help reduce the risk of flooding later in the spring, which can happen with rapidly melting snow and seasonal precipitation.
Currently, the Boise River reservoirs are at approximately 82 percent of capacity.


Common 08 – Heat Exchangers, Cooling Coils, Chillers, Fan Coils
Many systems include items such as heat exchangers, boilers, fan coils, cooling coils, filters, chillers and spray nozzles etc. Each of these items will have a pressure loss characteristic associated with various flow rates through the item. The Component object allows any item where the flow versus pressure loss characteristic is known, to be modelled as part of the system.
The Pipe Flow Expert component object allows any object where the flow and pressure loss characteristics are known, to be modelled as part of the system. In a Pipe Flow Expert model, a component is associated with a pipe and the flow rate in the pipe is then used to calculate the corresponding component pressure loss. The component object can also be used to specify a Fixed Pressure Drop within a system.
Here, several Components have been used to model the flow rate versus pressure loss characteristics of a boiler and two heat exchangers. The Component symbol can be changed to represent a Valve, Heat Exchanger, Cooling Coil, Heating Coil, Fan Coil, Nozzle, Radiator, Filter and more... The chosen symbol does not affect the pressure loss calculations.


Product Name: Coking Furnace Feed Pump TDR Series
Product Number: 876
Added time: 2011-03-01
Number of views: 77
The TDR pump is a feed pump for the radiant furnace in the coking unit and can also be used for the transport of high temperature liquids.
Flow rate (O): 7.5-336m3/h
Head (H): 1390～530m
The temperature of the conveying medium does not exceed 450 °C.
The inlet and outlet flanges of the product are vertically upwards, and the pump body is a double-shell structure. The internal parts of the pump can be inspected and repaired without moving outside. The pump body materials are all heat-resistant steel, the axial force of the pump rotor is balanced by the double balance drum, and the residual axial force thrust bearing bears. The shaft seal of the pump uses a metal bellows-type mechanical seal that is suitable for full temperature. The rotor of the pump is supported on the sliding bearings on both sides, and the bearings are forced to lubricate.


SCH Number 2019039037
- Upper Blue Lake Dam Seismic Retrofit Project
- Pacific Gas & Electric Company (PG&E) is proposing to construct the Upper Blue Lake Dam Seismic Retrofit Project at Upper Blue Lake reservoir in Alpine County. A preliminary seismic slope stability evaluation of the dam that was conducted in 2014 indicated that the dam would likely liquefy during an earthquake. The proposed project would improve the seismic stability of the dam by placing a 50-ft wide by 175-ft long rock fill buttress on the upstream side of the Upper Blue Lake dam. The addition of the buttress would require an upstream extension of two low level outlet pipes by approx. 50 ft and reconfiguration of the intake structure and trash rack. The project area consists of the dam retrofit area, bypass piping, staging and parking areas, and spoils placement and storage areas.
3 documents in project
|NOD||Regional Water Quality Control Bd., Region 5 (Sacramento)||Upper Blue Lake Dam, No. 97-70|
|NOD||Regional Water Quality Control Board, Region 5 (Central Valley)||Upper Blue Lake Dam Seismic Retrofit Project|
|MND||Regional Water Quality Control Board, Region 5 (Central Valley), Sacramento||Upper Blue Lake Dam Seismic Retrofit Project|
Disclaimer: Summaries of the notices may take several days to appear on CEQAnet. Again, the publishing of information on CEQAnet does not factor into when such notices were received and posted by the SCH. Contact the SCH for copies of an NOE or NOD that has been posted at OPR.


The Karot hydropower project is a 720 MW hydropower project located on Jhelum River in Pakistan. The project comes with a estimated $2 billion investment price tag and is part of the wider $48 billion China-Pakistan Economic Corridor initiative. The project will see the construction of a 95 metre high dam, whose reservoir has a total storage capacity of 164.50 million m3. The project consists of five-project cascades, a bridge across the dam as well as a spillway structure. The project is slated for completion in 2021.
Mott MacDonald provided lenders’ technical, environmental and social advisory services to the development of the project. The work included, among others, environmental and social impact reporting, during the consultation phase of the project.
It was recently announced that the project has achieved financial close, with Mott MacDonald providing lending technical due diligence for the project’s financiers. The firm’s duties were relatively wide ranging, including review of the project’s design, changes to orders and disbursement applications. The firm will now provide supervision during the construction phase of the project in relation to agreements made regarding technical, environmental and social matters.
Brian Minhinick, Mott MacDonald’s project director, says, “We are proud to be supporting this milestone project, continuing our leading role in developing Pakistan’s hydropower resource. Once complete, Karot will play a key role in helping address the shortfall in generation capacity by creating a long-term, sustainable power supply.”


The Chao Phraya River basin (CPRB) in Thailand had a massive flooding in 2011, which affected on not only Thai socio-economics but also global supply-chain of industrial production. The Thai government is planning watershed management for the CPRB. In order to propose a new reservoir operation system on science-based which can be easily put into practice, we studied a reservoir optimum operation for Bhumibol and Sirikit reservoirs in the CPRB. This paper proposed the new reservoir operation method that daily release discharge were decided by using the day before storage volume data. A usefulness of the reservoir operation method was verified using historical hydrological data. As a result, the proposed reservoir operation method could contribute stabilization of storage volume.


The Flood Warning continues for
the Mississippi River near Greenville
* until Thursday evening.
* At 10:00 am Monday the stage was 48.7 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Flood stage is 48.0 feet.
* Forecast... the river will slowly fall to below flood stage by Thursday
* Impact... at 48.0 feet... water begins to cover the dirt Road leading
to the farmers grain terminal facility which is north of the new
* Impact... at 45.0 feet... bottomland near river is flooded.
* Impact... at 44.5 feet... Road to bunge corporation grain elevators is
* Impact... at 43.5 feet... Lower Lake Ferguson Road begins to flood.
* Impact... at 42.0 feet... flooding is occurring around Lake Ferguson.
Flood observed forecast 6am crest
location stg stg day time Tue Wed Thu crest time date
Lower Mississippi River
Greenville 48 48.7 Mon 10 am 48.7 48.5 48.0 falling


The Water Distribution Network for Barka in Al Batinah Region ? Phase II consists in the design of Ground Tanks, Pump Stations, Transmission Lines, Elevated Tanks and distribution lines.
The proposed scope of work can be summarized as follows: To design four twin concrete Ground Water Tanks, rectangular shaped, each with 17,500 m? capacity; To design two Pump Stations to supply the water networks with 4 variable speed pumps 200 l/s at 70 meters head To design five D.I. Transmission Line to supply the Elevated Tanks (approx. 25 km length); To design five Elevated Tanks with a capacity of
approximately 1300 m?; To design five HDPE Distribution Networks to supply the villages in West and East Barka Area (approx. 150 km length); To design a SCADA system to monitor and control the Water Network system and to design
the new PAEW Barka Administration Offices.


Tagurshit is a 74.01MW hydro power project. It is planned on Tagurshit river/basin in Arunachal Pradesh, India. The project is currently in permitting stage. It will be developed in single phase. The project construction is likely to commence in 2023 and is expected to enter into commercial operation in 2025.
|Project Type||Total Capacity (MW)||Active Capacity (MW)||Pipeline Capacity (MW)||Project Status||Project Location||Project Developer||Hydropower||74.01||–||74.01||Permitting||Arunachal Pradesh, India||L&T Arunachal Hydropower|
The project is being developed and currently owned by L&T Arunachal Hydropower.
Tagurshit is a run-of-river project. The hydro reservoir capacity is planned to be 0.203 million cubic meter. The gross head and net head of the project will be 405.5m and 394.35m respectively. 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, is expected to be 3 in number. The penstock diameter will be 1.4m. The project is expected to generate 328.52 GWh of electricity. The project cost is expected to be around $122.225m.
The hydro power project consists of 3 turbines, each with 24.67MW nameplate capacity.
The project has 3 electric generators that will be installed at the project site.
The project construction is expected to commence from 2023. Subsequent to that it will enter into commercial operation by 2025.
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.


Were Sorry - this product is no longer available
Upper Mississippi River Navigation Charts Book
The Upper Mississippi River Navigation Chart Book covers the Upper Mississippi River from the head of navigation at river mile 866 in Minneapolis, Minn., to the conjuction with the Ohio River at river mile 0 at Cairo, Ill. The navigable portions of the Minnesota and St. Croix Rivers are also included. The charts were last updated in 2011.


San Jose, Costa Rica Enel Green Power has begun construction of the 50-MW Chucas hydropower project in Costa Rica, parent company Enel said in a statement.
The hydro project spans provinces Alajuela and San Jose and will generate 219 GWh annually.
Chucas is due to be completed mid-2013 and will increase Enel’s capacity in the country to 105 MW. The company’s current capacity in Costa Rica comes from hydro (31MW) and wind (24MW).
In the region, Enel Green Power also is building the 84-MW Palo Viejo hydro project in Guatemala.


Please use this identifier to cite or link to this item:
|Title:||Air entrainment effects on the pressure transients of pumping systems with weir discharge chamber|
|Authors:||Lee, T.S. |
|Citation:||Lee, T.S., Ngoh, K.L. (2002-12). Air entrainment effects on the pressure transients of pumping systems with weir discharge chamber. Journal of Fluids Engineering, Transactions of the ASME 124 (4) : 1034-1043. ScholarBank@NUS Repository. https://doi.org/10.1115/1.1514204|
|Abstract:||This paper presents a new model for the study of air entrainment on the extreme pressure surges in pumping systems. For the present fluid system considered with a weir discharge chamber, numerical investigations showed that, with the proposed model of the air entrainment, reasonable predictions of transient pressures with proper phasing and attenuation of pressure peaks can be obtained. The results obtained are consistent with observations from field measurements made when the pumps were operating at low pump cutout levels where air entrainment due to attached surface vortex and falling jets from the inflow near the pump intake were present. Further studies were also made on the design characteristics of the weir discharge chamber on the extreme pressure transients for the unsteady flow in the pipeline system with various degrees of air entrainment.|
|Source Title:||Journal of Fluids Engineering, Transactions of the ASME|
|Appears in Collections:||Staff Publications|
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Maintaining proper pool water level is very important. It is much more critical than you think.
Ideal pool water level is about half way of the skimmer opening.
If the water level is too high, leaves and debris on the water surface can not be skimmed into skimmer causingdirty look of your pool.
Low water level causes much more problems and it could be critical. If the water level is too low, your pool pump will sucks in the air. It makesthe pump loose it's primeand causes lack of pool water circulation.


In order to develop a centrifugal blood pump that meets the requirements of a long-term, implantable circulatory support device, in this study a single-pivot bearing supported centrifugal blood pump was designed to evaluate its basic performance. The single-pivot structure consisted of a ceramic ball male pivot mounted on the bottom surface of the impeller and a polyethylene female pivot incorporated in the bottom pump casing. The follower magnet mounted inside the impeller was magnetically coupled to the driver magnet mounted on the shaft of the direct current brushless motor. As the motor rotated, the impeller rotated supported entirely by a single-pivot bearing system. The static pump performance obtained in the mock circulatory loop revealed an acceptable performance as a left ventricular assist device in terms of flow and head pressure. The pump flow of 5 L/min against the head pressure of 100 mm Hg was obtained at rotational speeds of 2,000 to 2,200 rpm. The maximum pump flow was 9 L/min with 2,200 rpm. The maximum electrical-to-hydraulic power conversion efficiency was around 14% at pump flows of 4 to 5 L/min. The stability of the impeller was demonstrated at the pump rpm higher than 1,400 with a single-pivot bearing without an additional support at its top. The single-pivot supported centrifugal pump can provide adequate flow and pressure as a ventricular assist device, but its mechanical stability and hemolytic as well as thrombotic performances must be tested prior to clinical use.
ASJC Scopus subject areas


River realignment planned at Spring Lake Park
There have been a number of barge groundings, with the subsequent dredging, in the Mississippi River at Spring Lake Park. The U.S. Corps of Engineering is proposing to cut a new channel realignment of the river near the area to reduce the long-term costs of dredging the existing channel. Under state law Dakota County has been the responsible governmental unit for the preparation of the environmental assessment worksheet.


The point in construction is that the project is completed in shortest possible period of time and, of course with minimal additional costs. In this graduation thesis it`s described one of the major construction projects on the Slovenian coast, namely the construction of tanks for petroleum products. The graduation thesis analyzes the deviation of the vontractual schedule and contractual estimate fot the construction of reservoirs R21, R22 and R23. Changes in the project which led to the time lag between construction and unexpected costs was described in detail, as well as the breakdown of labor, because at the facility involving several subcontractors, which represented additional obstacle in work. The construction of
tanks for petroleum products also included the construction of the other supporting facilitiey.


The pump (V17) includes pre-pressure pump, pressure regulator, stop valve, relief valve and output connection. And it adopts anti-rust technology, good sealing performance, stable pressure generating performance, long lifetime, simple operation.
The pump (V17) serves as pressure generator for the testing, adjustment and calibration of mechanical and electronic pressure measuring instruments.
It is widely used both in laboratory and on site for Power, Metallurgy, Petroleum, chemistry, Metrology industries.
1. Pressure range: (0~700)bar
2. Connection: M20x1.5 Optional;
3. Media: Oil
5. Weight: 4.8kg;


ContourGlobal was founded in 2005 by current CEO Joseph Brandt, along with Reservoir Capital Group, a New York-based investment fund. Today, the company is uniquely positioned to continue its expansion through various ongoing growth projects.
CG is a developer and operator of electric power and district heating businesses. CG manages, owns and operates an existing portfolio of 41 power plants with approximately 3,718 megawatts (“MW”) of installed gross capacity in operation or under construction, which makes up our total installed gross portfolio capacity. Our current portfolio spans 17 countries and 4 continents with a weighted average sovereign rating of BBB (weighted by capacity), utilizing a wide range of fuel types, technology and equipment. Of the 41 power plants in CG current portfolio, 36 are currently operating with a combined installed gross capacity of approximately 3,145 MW, which represents approximately 84.6% of the portfolio capacity (CG portfolio capacity consists of the operating assets and projects under construction that currently do not generate energy). In addition to CG operating assets, there are also six projects under construction with a total gross capacity of approximately 573 MW, which comprises the remaining 15.4% of the current portfolio capacity.
In July 2015, ContourGlobal Hydro Cascade CJSC, the local CG subsidiary, acquired Vorotan Complex of Hydroelectric Power Stations CJSC.
Vorotan Complex of Hydroelectric Power Stations (CHPS) is a complex of three hydroelectric power stations with an overall capacity of 404.2 MW and an average annual power generation of 1.16 billion kWh. The Vorotan Cascade is among the main power generation complexes in Armenia, providing both peak and base load generation, and performing grid stabilization services. The complex is located in the eastern part of Syunik region of the Republic of Armenia, some 240 km to the South-East of Yerevan. The Cascade has a total head of 1,223 m. The design of the Vorotan CHPS began in 1954, construction started in 1961. In 1970 the first power station, Tatev HPP, was put into operation, followed by Shamb HPP in 1978 and Spandaryan HPP in 1989.
Vorotan CHPS is located at the Vorotan River. It is comprised of four reservoirs and one Daily Regulation Pond. The Spandaryan Reservoir is the upper reservoir of the cascade. Highest water level is at 2,063 m a.s.l.; minimum water level is 2,030 m. The water is directed through an 8.1 km long pressure tunnel and a 2.17 km long penstock to Spandaryan HPP. The discharge from Spandaryan HPP and water from Vorotan River is retained by Angeghakot dam forming the Angeghakot Reservoir. Highest water level is at 1,677.4 m a.s.l.; minimum water level is 1,664.5 m. Water flows from this reservoir via a 10.5 km long gravity fed tunnel to the Tolors Reservoir, which is also fed by the Sisian and Ayri Rivers. Highest water level is at 1,651.5 m a.s.l.; minimum water level is 1,625.5 m. From the Tolors Reservoir, the water is supplied to the Shamb HPP via a 6.9 km long pressure tunnel and a penstock of 1.26 km in length. Below the Shamb HPP is the Shamb Reservoir (also named Tatev Reservoir) which is also fed by water from Laradzor River. Highest water level is at 1,335.4 m a.s.l.; minimum water level is 1,333.8 m. From this reservoir water flows through an 18.4 km long gravity fed tunnel to the Daily Regulation Pond of the Tatev HPP, from where the water is directed to Tatev HPP via a 1,900 m long pressure penstock.


Cla-Val Pacific 43-01 and 643-01 Combination Rate of Flow Controller and Solenoid Shut-Off Valves limit the maximum flow rate, regardless of changing line pressure. It is a hydraulically operated, pilot controlled, diaphragm valve. On either model, the pilot control is actuated by the differential pressure produced across an orifice plate installed downstream of the valve. Accurate control is assured as very small changes in the controlling differential pressure produce immediate corrective action of the main valve. A solenoid control is provided to intercept the operation of the differential control and close the main valve.
Models 43-01 and 643-01 includes a orifice plate with a holder that should be installed one to five pipe diameters downstream of the main valve. If the check feature option is added and a pressure reversal occurs, the downstream pressure is admitted into the main valve cover chamber and the valve closes to prevent return flow.


Infiltration systems are widely used as an effective urban stormwater control measure. Most design methods and models roughly approximate the complex physical flow processes in these systems using empirical equations and fixed infiltration rates to calculate emptying times from full. Sophisticated variably saturated flow models are available, but rarely applied owing to their complexity. This paper describes the development and testing of an integrated one-dimensional model of flow through the porous storage of a typical infiltration system and surrounding soils. The model accounts for the depth in the storage, surrounding soil moisture conditions and the interaction between the storage and surrounding soil. It is a front-tracking model that innovatively combines a soil-moisture-based solution of Richard's equation for unsaturated flow with piston flow through a saturated zone as well as a reservoir equation for flow through a porous storage. This allows the use of a simple non-iterative numerical solution that can handle ponded infiltration into dry soils. The model is more rigorous than approximate stormwater infiltration system models and could therefore be valuable in everyday practice. A range of test cases commonly used to test soil water flow models for infiltration in unsaturated conditions, drainage from saturation and infiltration under ponded conditions were used to test the model along with an experiment with variable depth in a porous storage over saturated conditions. Results show that the model produces a good fit to the observed data, analytical solutions and Hydrus.


- BGC Contracting Office
- BGC Contracting Branch
- Mining Project
- Construction Project
Water Corporation Cunderdin Storage Tanks
Design and construction of these new tanks was an important part of the upgrade to the water quality along the Goldfields pipeline and to ensure the water is stored without risk of contamination. The project installation included:
- 144 precast panels weighting 24t each
- Two 3000m2 tank roofs
- 900m of dual pipelines installed
- Completed tie in to existing trunk main
- Pipe Under boring under live highway
BGC Contracting was awarded the contract to design, construct and test two 37.5 million litre ground level water tanks and associated works for the Water Corporation at Cunderdin, a town located in the Wheatbelt region of Western Australia.
The scope of work included in this project was:
- Site earthworks and foundations.
- In-ground water pipework including tie-in works to the existing goldfields pipeline.
- Design and Construction of two 68m diameter precast concrete water storage tanks
- Modular Roof Construction eliminate risk of working at heights using harnesses
- Associated new access roads and overflow sump.
Design and construction of these new tanks was an important part of the upgrade to the water quality along the Goldfields pipeline and to ensure the water is stored without risk of contamination, which was the issue with the legacy open water storage dams. A highly successful project in the suite of project delivery to Water Corporation.


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solar water pump
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Product description Of Solar Powered Deep Well Submersible Pump
QJD series submersible well pump is made up of two main parts: electric motor and multi-grade pump body. The pump body is made up of impeller, guide vain, pump case, water inlet unit, water outlet unit, pump shaft, shaft sleeve and guide bearing. Motor uses double end mechanical seal. Rubber “O” ring is used as static seal.
It is widely used in farm land irrigation, garden spray, well, water tower, urban construction, industries and mines.
Product Picture Of Solar Powered Deep Well Submersible Pump
Technical Parameter Of Solar Powered Deep Well Submersible Pump


ISO 11298-3:2010, in conjunction with ISO 11298-1, specifies requirements and test methods for close-fit lining systems intended to be used for the renovation of water supply networks, which transport water intended for human consumption, including raw water intake pipelines.
It is applicable to polyethylene (PE) pipe for both independent and interactive pressure pipe liners as well as associated fittings and joints for the construction of the lining system.
Status: WithdrawnPublication date: 2010-03
Edition: 1Number of pages: 14
Technical Committee: ISO/TC 138/SC 8 Rehabilitation of pipeline systems


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5″ Submersible multistage pumps for open wells
Irrigation, decanting and hydropneumatic sets. Max. immersion level according to technical table, code 2240.
- Outer casing, discharge body, impellers, filter and motor casing in stainless steel AISI 304.
- Motor shaft and pump shaft in stainless steel AISI 303.
- Diffusers in tecnopolimer.
- Double mechanical seal, in ceramic/graphite/NBR.


Yangyang Pumped Storage Power Station
|Yangyang Pumped Storage Power Station|
|Construction cost||₩1.1 trillion won (US$1.4 billion).|
|Owner(s)||Korea Hydro & Nuclear Power|
|Pumped-storage power station|
|Upper res. capacity||4,568,000 m3 (3,703 acre⋅ft)|
|Lower res. capacity||19,982,000 m3 (16,200 acre⋅ft)|
|Hydraulic head||817 m (2,680 ft) (maximum)|
|Generating units||4 x 250 MW (340,000 hp) reversible Francis-type|
|Nameplate capacity||1,000 MW (1,300,000 hp)|
The Yangyang Pumped Storage Power Station uses the water of the Namdae-Chun River to operate a 1,000-megawatt (1,300,000 hp) pumped storage hydroelectric power scheme, about 10 kilometres (6.2 mi) west of Yangyang in Gangwon Province, South Korea. The lower reservoir is created by the Yangyang Dam on the Namdae and the upper reservoir by the Inje Dam is located 937 metres (3,074 ft) above the power plant. Construction on the power plant began in 1996 and it was completed and dedicated on September 13, 2006. It is operated by Korean Midland Power Co., a subsidiary of Korea Electric Power Company and was completed at a cost of ₩1.1 trillion won (US$1.4 billion). The first generator was operational on February 23, 2006 and the last August 10, 2006.
Design and operation
The operation of the power plant begins on the Namdae-Chun River where it is dammed by the Yangsang (Sangbu) Dam at gravity dam. Water from a 124.9 km2 (48 sq mi) catchment area collects into the lower reservoir which has a 19,982,000 m3 (16,200 acre⋅ft) capacity, of which 4,200,000 m3 (3,405 acre⋅ft) is active (or "useful") capacity for the power station. The lower reservoir has a surface area of 1.1 km2 (272 acres) and operates at storage levels between 127 and 131 metres (417 and 430 ft) above sea level., creating the lower reservoir. This dam is 61.5 metres (202 ft) tall and 275 metres (902 ft) long concrete
During low electricity demand periods, such as the night time, water from the lower reservoir is pumped 937 metres (3,074 ft) above the valley to the upper reservoir in the mountains. The upper reservoir is created by the Inje Dam, located 5.3 km2 (2 sq mi) west of the Yangyang Dam at embankment dam. The capacity of the upper reservoir is 4,200,000 m3 (3,405 acre⋅ft) and it has a surface area of 190 square metres (0.047 acres; 0.019 ha). When electricity demand rises and the power plant begins to operate, water is released from the upper reservoir back towards the underground power plant, at the western edge of the lower reservoir. Water fluctuations in the upper reservoir range from 900 metres (3,000 ft) and 936 metres (3,071 ft) above sea level. The power plant contains four 250 MW reversible Francis turbine-generators for an installed capacity of 1,000 MW. The drop in elevation affords a maximum hydraulic head (drop) of 817 metres (2,680 ft) and effective head of 776 metres (2,546 ft).. The Inje is a 84 m (276 ft) tall and 415 metres (1,362 ft) long rock-fill
- "Korea dedicates 1,000-MW Yangyang pumped-storage". HydroWorld. 13 September 2006. Retrieved 5 August 2011.
- "Pumped-Storage Plants". Korea Hydro & Nuclear Power. Retrieved 5 August 2011.
- "Environmental Impact Assessment of the Yangyang Pumped Storage Power Plant Construction on the Namdae-Chun River, Korea" (PDF). Korea Electric Power Co. 1 June 1997. Retrieved 5 August 2011.
- "Yangyang Pumped Storage Power Plant South Korea". Global Energy Observatory. Retrieved 5 August 2011.
- "Status of Power Generation Equipment". Korean Midland Power Co. Retrieved 5 August 2011.


This project will evaluate about 6,000 feet of roadside ditches and culverts along Semiahmoo Drive. The project will upgrade the drainage system as needed to reduce the frequency of standing water on the roadway and improve the drainage in this area.
Replace failing system
The roadway culvert under Semiahmoo Drive was found to be undersized. The project will replace the existing 12-inch diameter culvert with a new 30-inch diameter pipe. The length of the new pipe is approximately 165 feet. The work includes some minor ditch re-grading.
The project is currently at the 90% design level and project construction is planned for 2022 and should take about five weeks to construct.
Erosion was observed downstream of the project after a series of storms in November 2021. The County is working with FEMA to evaluate the stability of the outfall channel and downstream slopes. The County has postponed this work until the engineers have studied the area and determined the appropriate actions to address the outfall erosion. Construction is anticipated for 2024.


Overview: The project is located in the town of kizil Tepa, Navoi state. The irrigation pump station is equipped with 26 horizontal double-suction single-stage centrifugal pumps.
Parameters: The lift is 80m, the flow rate is 1.75m³/s, the single pump power is 2000kW, and the voltage is 6kV.
Scope: supply, commissioning, trial operation and personnel training of monitoring system, power supply system, monitoring equipment.
I WANT TO CONSULT


Chapple Street Water Main Replacement (D&C) – Gympie QLD
Client: Gympie Regional Council
Commencement: May 2021
– Provide detailed design and investigation to replace 325m of existing DN100 Cast iron water main along Mellor and Chapple street, Gympie.
– Supply and Install 325m of DN150 PVC water main along same alignment as original cast iron main.
– Design, installation and commissioning of temporary HDPE water main to ensure minimal supply disruptions to existing customers.
– Testing and commissioning of new water main.
– rehabilitation and re-in-statement of concrete footpaths and driveways.
– Staged construction to ensure clients program requirements achieved.


Gösgen run-of-river power station
Built in 1917, the Gösgen power station has an annual output of around 300 GWh and is one of the largest run-of-river power plants on the river Aare. Between 1997 and 2000 the power station was completely rebuilt and now produces twelve percent more electricity with the same flow of water. In 2004 a new fish ladder was put into operation at the weir in Winznau. The Gösgen power station is one of the most productive run-of-river power stations on the River Aare. A 4.8 kilometer canal also belongs to the power station.
Large Run-of-River Plants
5 Kaplan turbines (1 of which 16.7 Hz traction power SBB)
Alpiq: 100 %
1917 / 2000


The agreement by BC Hydro to purchase all power generated by the proposed 150MW Keenlyside power plant in south central BC has kick started the project – previously postponed several times.
A contract for design and construction of the project is to be awarded this year to one of three short-listed firms, who submitted proposals for the design and construction of the project last September. The three finalists are groups headed by: Northern Con- struction Company Ltd with McNamara Construction Company; Peter Klewit Sons Co. Ltd.; and Walter & SCI Construction (Canada) Ltd. The plant is expected to be complete by the end of 2002. The project is owned by Columbia Basin Trust (CBT) and Columbia Power Corporation (CPC), both provincially-owned.
The Keenlyside power plant will be sited at the existing Hugh Keenlyside dam on the Columbia River, 7km upstream of Castlegar. The dam was completed in 1968; it was built for water storage and has no generation. According to the original development plan the plant was to have a capacity of 220MW. The revised power plant will have 2x75MW Kaplan turbines operating under a net 17m head.


Renewable energy developer Drax Group is spearheading the expansion of the Cruachan power station in Scotland. The proposed £500m ($641.9m) expansion entails the construction of an underground pumped storage hydropower plant adjacent to the existing Cruachan facility.
The expansion, known as Cruachan II, will boost the site’s total generation capacity to 1.04GW. It will also be the first newly constructed plant of its kind in the UK in more than four decades.
The project will help in generating approximately 1,000 jobs during development. It is expected to commence operations in 2030.
The new power station will be situated adjacent to the existing Cruachan hydro-electric pumped storage, west of Dalmally on Loch Awe’s banks in Argyll and Bute, Scotland.
Drax submitted the planning application for the Cruachan Power Station expansion in May 2022. It secured development approval from the Scottish government in July 2023.
The project is part of Drax’s £7bn ($9bn) strategic investment plan in clean energy technologies, spanning from 2024 to 2030.
Construction works of the proposed project are expected to commence in 2024, which will involve the excavation of approximately two million tonnes of rock from within the Ben Cruachan Mountain to create the cavern, tunnels and other infrastructure of the power station.
Cruachan II details
The expansion project will involve the construction of a new reversible pumped-storage hydroelectric power station with up to 600MW of generating capacity.
Water from an existing upper reservoir on Ben Cruachan will propel the turbines of Cruachan II.
A new intake structure will be constructed within and adjacent to the Cruachan Reservoir. It will include a tower, screens, gates and gate-hoisting equipment to direct water into a new headrace tunnel and underground waterway system.
A new series of underground caverns will be constructed to house the reversible pump turbines and motor-generators together with associated equipment such as transformers and switchgear.
The tailrace tunnel will be a concrete-lined, low-pressure tunnel including a downstream surge shaft to the Loch Awe, which is the lower reservoir. The tailrace tunnel will feature an underground gate chamber and gate shaft on the upstream end of the lower control works.
The lower control works will comprise a screened inlet/outlet structure and stop logs on the Loch Awe, below the water level at the end of the tailrace tunnel.
The underground power plant will be accessed through a 1,450m-long, main access tunnel, which will cross-connect to the existing Cruachan power plant to allow for easy transit between the two plants.
The existing substation compound at Cruachan will be extended to accommodate two new 275kV circuit breakers and associated disconnectors. Each circuit breaker will be T-connected onto the existing 275kV overhead lines, which will enable connecting the new plant to the existing 275kV circuit connecting the site to the Dalmally sub-station, which is located approximately 7km to the east.
Cruachan power station details
The Cruachan power station, also known as the Hollow Mountain, is located within the Ben Cruachan Mountain in Argyll and Bute, Scotland.
Drax acquired the property in December 2018 through its purchase of the Lanark Hydro Scheme in a £702m ($809.3m) power deal. It is one of only four pumped hydropower generation stations in the UK.
The station can produce 440MW of power, sufficient to power 90,000 homes. The reservoir has a catchment area of 23km² and can store up to ten million cubic metres of water.
Stantec, a sustainable design and engineering services provider, was responsible for the concept design and technical, environmental, planning and consenting works as part of the project application process.
Studio Pietrangeli, a hydro-engineering consultancy, was appointed as the owner’s engineer for the project and will be responsible for the detailed design and layout optimisation of the new plant, including civil engineering works.
Engineering consultancy COWI will collaborate with Studio Pietrangeli to provide consultancy services to support works in advance of the front-end engineering design.


Usually the water level sensor we see is more of a single point water level sensor, the application is as follows.
The multi-point water level sensor enables a sensor to detect multiple levels. Compared to installing multiple single-point water level sensors on a water tank to detect multiple liquid levels, the multi-point water level sensor can save space by simply opening one hole in the container, and the single-point water level sensor needs Multiple holes are reserved and the installation takes time and space, and multiple sensors must have multiple wires. The multi-point water level sensor is more convenient to install and wire, which saves installation time.
Photoelectric water level sensors are widely used in home appliances and medical fields. In the water dispenser, coffee machine, water purifier, humidifier, etc., the water level control uses a highly reliable photoelectric water level sensor. The single point water level sensor is usually used.
The single-point water level sensor is internally composed of a set of infrared transmitting tubes and receivers. When the sensor position is in a waterless state, the light emitted by the transmitting tube is reflected back to the receiver. When in a water state, the light is refracted in the water and the receiver can only receive a small amount of light or receive no light. This is the working principle of the single-point photoelectric water level sensor.
So how does the multi-point water level sensor work?
The multi-point photoelectric water level sensor also uses the optical refraction principle for liquid level detection. The multi-point water level sensor is composed of multiple sets of transmitting and receiving tubes, and the output signal is a digital signal. Compared with the single-point water level sensor, the multi-point function is the same, mainly to detect the liquid level to achieve water shortage protection and anti-overflow reminder function.


HARC awarded Perth flood study
We are pleased to announce that HARC has been awarded the hydrology component of the Swan and Helena Rivers Flood Study. The Swan River is one of the iconic sights of Perth, however lacks up to date estimates of design flood flows and water levels. The Swan River catchment is notable for its size and complexity, with parts of the eastern catchment extending almost to Kalgoorlie. HARC will work closely with our project partners DHI to deliver updated design flood estimates for the eastern region of Perth.


Passive Control Shuttle-Type Check Valve – a New Nuclear-Class Fluid Control Component
A novel check valve - passive control shuttle-type check valve is introduced in this paper based on the comparison of the existing swing check valves including the liquid, structural principle, flow resistance coefficient, airproof and start-stop performances. The experimental and simulation analysis validated that shuttle-type check valve has the advantages of symmetric structure along the pipeline axis, balance circle flow, low coefficient streamline, adjustable start-stop time, multi-airproof, zero leakage and less noise.
K. Chen et al., "Passive Control Shuttle-Type Check Valve – a New Nuclear-Class Fluid Control Component", Advanced Materials Research, Vols. 317-319, pp. 1474-1477, 2011


Water Reservoirs, Bushehr
Derakht (Tonbeh Koru) Water Reservoir, Dashtestan
Derakht (Tonbeh Koru) Water Reservoir (Dashtestan)
This water reservoir is 12 km. east of Burazjan and at present has two reservoirs to the radius of approximately 4 m. dug out in the ground.
Qavam Water Reservoir, Bushehr
Qavam Water Reservoir (Bushehr)
This water reservoir is near Khalij-e-Fars Avenue, it was constructed during the Qajar era and dates back to more than 150 years ago.


According to a press release from the Tennessee Valley Authority, the dam repair project should be completed by 2022 with a total estimated cost of $450 million.
TVA spokeswoman Mary Ellen Miller said nearly 36,000 tons of stone from local quarries have been placed to fortify the upstream berm during the first part of construction plans. The additional rock will help fortify the earthen embankment — which is about 900 feet long — ahead of the construction of a diaphragm wall. Miller said the idea behind this phase of the project is to prevent “internal erosion.”
Work is also underway on the downstream side of the dam to move machinery in preparation for the new construction. The next phase of work, according to officials, will be to widen the top of the dam.
For more on this story, visit the Johnson City Press.


The Flood Warning continues for
the Missouri River at Napoleon.
* Until late Saturday night.
* At 5:00 am Friday the stage was 17.6 feet.
* Flood stage is 17.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast... the river will continue rising to near 17.8 feet by this
morning. The river will fall below flood stage Saturday morning.
* At 17.0 feet... low-lying areas unprotected by levees begin to
location fs stage day/time forecast
Napoleon 17 17.6 Fri 05 am 17.8 this morning
lat... Lon 3916 9415 3922 9417 3925 9386 3918 9384 3911 9405
Severe Weather Get Mobile & Email Alerts
Ray Severe Watches & Warnings NOAA Weather Radio
Statement as of 5:29 AM CDT on May 22, 2015


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)
La Gogue Dam (Seychelles)
The aims of the assignment are the Design Review...
Arcichiaro Multi-purpose Project (Italy)
Rockfill dam with bituminous facing (BFRd) with a reservoir for irrigation,...
Little Beles Storage Plant (Ethiopia)
Reservoir for water supply with a storage capacity equal to 3.5 Mm³.
Mulembo-Lelya Hydropower (Zambia)
Mulembo-Lelya is a hydropower project located...
Bagré Multi-Purpose Project (Burkina Faso)
The “Pôle de Croissance de Bagré”...
Chespi Hydropower (Ecuador)
Chespi is the first hydroelectric project of the Guayllabamba cascade with an...
Anguilles Dam (Mauritius)
The scope of the project is to make use of the...
HV Transmission Lines (Tanzania)
This is a feasibility study and detailed design...
Hydropower Projects (Jamaica)
The scopes of the assignment, commissioned by...


Client: Asa Energy
Installed Capacity 13 MW
Jet Grout Columns
Semi Indoor Type Powerhouse
Demirci HEPP is a diversion type hydropower project located in Black Sea Region within the border of Kastamonu province over the Gökırmak. The construction of the project started in September 2012 and the project is expected to be finished and to start operating in 2014.
Demirci HEPP is located on Gökırmak- an important branch of Kızılırmak. There are several regulating projects at the upstream of the project.
Demirci HEPP project is composed of a diversion weir, a 21 km long trapezoidal channel, a forebay with a reservoir, a 450 m long penstock and a powerhouse.
Demirci Weir is founded on a deep permeable soil and in order to prevent excessive leakage, jet grout columns are designed under the weir. Since the project has a long channel, about 25 flood passes are designed along this line in order to protect the channel. The forebay of Demirci HEPP project is designed to have 30 000 m3 active storage for daily regulation. By means of this design, low regimes of flow are stored at the forebay and can be turbined at peak hours. Due to unfavorable geological conditions at the site, the powerhouse is designed to be installed over reinforced concrete piles. The semi indoor type powerhouse have three equal capacity horizontal axis Francis turbines


Stauraumkanal Solbadstraße, Bad Pyrmont © 2015 Sei LandschaftsArchitekturbüro Georg von Luckwald
Environmental construction supervision for the new construction of a storage channel for the combined sewer system
Environmental construction supervision for exploratory drillings and test water drainage in the run-up as well as for the canal construction and the compensation measures.
Highly sensitive location of the construction project in the healing spring protection area of the city of Bad Pyrmont. In addition, in the flood, nature conservation, landscape conservation and FFH area.
Read more +
2013 - 2014
ca. 1,3 Mio €
Entsorgung Bad Pyrmont AöR
31812 Bad Pyrmont
Show project location on map


Blafalli Kraftverk is an 118MW hydro power project. It is located on Blaelva river/basin in Vestland, Norway. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the project is currently active. It has been developed in multiple phases. Post completion of construction, the project got commissioned in 1968. Buy the profile here.
The project is currently owned by Sunnhordland Kraftlag.
Blafalli Kraftverk is a reservoir based project. The project generated 502.8 GWh of electricity.
The project got commissioned in 1968.
For more details on Blafalli Kraftverk, buy the profile here.


The HVUSSS is Hong Kong's first flood storage tank provided with a “Movable Crest Weir” that works in connection with a "Supervisory Control and Data Acquisition" (SCADA) system. This design effectively lowers construction cost and time, as well as operation power consumption, addressing flood prevention and environmental initiatives in tandem.
Design and Operation:
Through the SCADA system, the positioning of the movable weir is controlled based on the real-time tidal level and water levels inside the tank, and upstream and downstream of it in the box culvert. This allows overflowing of stormwater from the box culvert to the tank to be invoked at the most optimal time.
Compared to the conventional fixed-weir design, the real-time SCADA-controlled movable weir prevents pre-mature or belated filling of the tank, thereby maximizing the effectiveness of the storage capacity and allowing a smaller design tank volume.
Furthermore the tanks is of a shallow-depth design. After heavy rain, as water level in the downstream box culvert subsides, the movable weir can be lowered further to allow about one-third of the stored stormwater to be discharged by gravity back to the box culvert, reducing the need for pumping.


Alerts in Effect
Flood WarningIssued at 20:26 Thursday 20 February 2020
The Flood Warning continues for the Mississippi River.
The Flood Warning continues for
the Mississippi River at Memphis
* until Thursday February 27.
* At 08 PM Thursday the stage was 34.4 feet.
* Minor flooding is occurring AND Minor flooding is forecast.
* Maximum forecast stage of 34.8 feet on Sunday February 23.
* Flood stage is 34.0 feet.
* The river rose above flood stage Wednesday February 19 and will
continue rising to near 34.8 feet by Sunday February 23. The river
will fall below flood stage Thursday February 27.
* At 34.0 feet...In Arkansas, the camp on Robinson Road right inside
the levee is totally flooded. Roads to industries inside the levee
south of West Memphis are flooding.


Ecocoast was appointed by Salini Impregilo SpA to
carry out the construction of a temporary causeway to support the construction of a new project in Abu Dhabi. The temporary causeway is composed by reclaimed filled material, geotubes and geobags. CWP Engineering was appointed by Ecocoast to provide marine engineering services to undertake the design of the temporary causeway.
Marine Consultant: CWP Engineering


High Pressure and Extra High Pressure Piping
High pressure and extra high pressure piping is used for applications above an operation pressure of 50 MPa. The HP flange connections are typically threaded.
Nominal size: DN10-DN150
Nominal Pressure range: PN1600-PN4000
various high pressure materials, depending on customer’s requirement including different material grades of SA-723, DIN EN 1.6580, AISI 4340
e. g. lens rings, cone rings
ASME B31.3, AD2000, taking into account country-specific restrictions