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GATE Exam Questions - Engineering

Q1:

Storage coefficient of a compressible confined aquifer is a function of

A specific weight of water, thickness of the aquifer, compressibility of the aquifer and that of water

B permeability, thickness and compressibility of aquifer and compressibility of water

C transmissibility of the aquifer and compressibility of water

D transmissibility of aquifer and specific yield of aquifer

ANS:D - transmissibility of aquifer and specific yield of aquifer

The storage coefficient, S can be expressed as;

S = γ(nβ+α)B

The storage coefficient S represents the volume of water released by a column of a confined aquifer of the unit cross-sectional area under a unit decrease in the piezometric head,

Where γ=ρd = weight of unit volume water.

β = compressibility of water.
α = compressibility of pores.
B = thickness of the aquifer.