The water stored in the reservoir below the minimum pool level is called
- AUseful storage
- BDead storageCorrect
- CConservation storage
- DFlood mitigation storage
Solution
Concept
Reservoir water storage below minimum level
Formula
NONE
Step-by-step solution
1. Dead storage is the volume of water stored in a reservoir below the minimum pool level. 2. Water in dead storage cannot be evacuated by gravity through the operating outlets. 3. Useful storage lies above the minimum pool level and is available for utilization. Answer: B
Explanation
Dead storage refers to the portion of water stored in a reservoir below the lowest outlet level or invert level of the sluice gates. Because this water lies below the operational outlets, it cannot be drained by gravity for regular water supply or irrigation needs. It primarily serves as a capacity buffer to accumulate trapped sediment over the lifespan of the dam.
Why the other options are wrong
A) Useful storage is the volume of water available above the minimum pool level. C) Conservation storage is stored water retained for municipal or agricultural demand. D) Flood mitigation storage is space reserved for absorbing flood peaks above the normal pool level.
Shortcut
Water stored below the minimum level cannot be extracted by gravity, making it "Dead" storage.
Common mistake
Confusing dead storage below the minimum pool level with useful or conservation storage available above it.
Correct answer: B) Dead storage