Question

A shallow alluvium aquifer (predominantly sandy material) of 5 km 2 of area has the following
characteristics: average water level from the bottom of the aquifer = 10 m, porosity of 40%, specific yield of 25%,
permeability of 0.5 Darcy units, compressibility of water is 4.6x10 -10 m 2 /N and compressibility of the solid material is
1.8x10 -8 m 2 /N, water density is 1000 kg/m 3 , and kinematic viscosity is 1.0x10 -6 m 2 /s.
Determine:
(a) Specific retention (S r ) of the aquifer.
(b) Amount of water storage in the aquifer for the average water depth of 10 m.
(c) Amount of water released from the aquifer if water level is reduced by 0.5 m.
(d) Specific storage (S s ) of the aquifer
(e) Storage coefficient (S) of the aquifer.
(f) Hydraulic conductivity of the aquifer.

Answer 1