Question

The dead storage in a dam reservoir is the available volume for collection of silt and sediment between _______________

(a) bed level of the reservoir and minimum reservoir level

(b) bed level of the reservoir and the silt level in the reservoir

(c) bed level of the reservoir and the normal pool level

(d) above the minimum pool level

I have been asked this question in quiz.

This is a very interesting question from Capacity and Area Elevation Curves of a Reservoir Site in section Reservoirs and Dam Reservoirs Planning of Irrigation Engineering

Answer 1

The correct option is (a) bed level of the reservoir and minimum reservoir level

To explain I would say: Useful storage can be defined as the volume of water stored in a reservoir between the minimum pool and normal pool level. Dead storage is the water stored in the reservoir below the minimum pool level. It is not of much use in the operation of reservoirs.