What are dam spillways used for?
A spillway is a structure used to provide the controlled release of water from a dam or levee downstream, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels.
What is wrong with the Tarbela Dam?
While constructing the world’s largest embankment dam, Tarbela in Pakistan, the designers and contractors faced unprecedented flow volumes and velocities, causing severe cavitation and erosion.
What is the Speciality of Tarbela Dam?
The primary purpose of the Tarbela Dam Project was to regulate the flows of the Indus River for irrigation use. Other objectives were to achieve substantial generation of hydroelectric power and flood control by conserving snow melt and monsoon flows of the Indus River.
Who was the engineer of Tarbela Dam?
Fawad Yousafzai. ISLAMABAD – Water and Power Development Authority (Wapda) has transferred Chief Engineer (Power) of Tarbela Hydel Power Station, Sher Afzal Khan, as General Manager (GM Power) with immediate effect.
What’s the difference between spillway and dam?
Spillways are structures that either form part of a dam, or are found just beside one. They are used, when a reservoir is full, to pass floodwater safely, and in a controlled way, over a dam, around it or through it. Next time you visit a dam, look for its spillway.
How do dam spillways work?
As soon as any excess water enters the reservoir, water will start flowing out through the spillway. It works similar to an overflow hole in a bathtub or sink at home, where if water levels go too high it’ll go into the hole and through the drain.
How does Tarbela dam work?
The dam was completed in 1976 and was designed to utilize water from the Indus River for irrigation, flood control, and the generation of hydroelectric power by storing flows during the monsoon period and subsequently releasing stored water during the low flow period in winter.
Which turbine is used in Tarbela Dam?
E&M Equipment of Tarbela
| Turbine | ||
|---|---|---|
| Units | (1~4) | (5~8) |
| Turbines Make | Hitachi Japan | DEW Canada |
| Type | Vertical Frances | Vertical Frances |
| Rated Output (BHP) | 275,000 / 239,000 | 275,000 / 239,000 |
What is the smallest dam in Pakistan?
Warsak Dam
Warsak Dam
| Warsak Dam د ورسک بند | |
|---|---|
| Impounds | Kabul River |
| Height | 76.2 m (250 ft) |
| Length | 140.2 m (460 ft) |
| Spillways | 9 floodgates |
Do all dams have spillways?
But sometimes we have to let some water go. Whether we need it downstream or the impounded water behind the dam is simply too full to store any more, nearly every dam needs a spillway to safely discharge water. Depending on the size of the structure and what’s downstream, the failure of a dam can be catastrophic.
Has anyone fallen into a spillway?
The spillway, which drops straight down more than 200 feet, is known as the Glory Hole. There has never been a documented case of anyone else falling through the Glory Hole, said Don Burbey of the Solano Irrigation District.