Answer to Question #317058 in Civil and Environmental Engineering for Tiara

Question

A contractor is trying to estimate the distance to be expected of drawdown of 4.81 m from pumping well under the following conditions:

a) Pumping rate 0.028 m3/s

b) Pumping time = 1066 days

c) Drawdown in observation well = 9.52 m

d) Observation well is located 10.0 m from the pumping well

e) Aquifer material = medium sand

f) Aquifer thickness = 14.05 m

Assume that the well is fully penetrating in an unconfined aquifer.

Answer 1

K = 1.4 $\times$ 10^-4m $\times$ s^-1

h₁ = 14.05 - 9.52 = 4.53 m (h₁)² = 20.52 

h₂ = 14.05 - 4.81 = 9.24 m (h₂)² = 85.38

$\frac{r2}{10.0}$ = 10.0$\times$ 2.7699

r₂ = 27.70m