GATE CE 2021 Set 1 — Question 60
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Water Resources Engineering → Hydrographs & Groundwater → Steady-State Well Hydraulics
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Question
A tube-well of diameter fully penetrates a horizontal, homogeneous, and isotropic confined aquifer of infinite horizontal extent. The aquifer is of uniform thickness. A steady pumping at the rate of from the well for a long time results in a steady drawdown of at the well face. The subsurface flow to the well due to pumping is steady, horizontal and Darcian and the radius of influence of the well is . The hydraulic conductivity of the aquifer (in , round off to integer) is _________
Correct answer
34 to 38
Solution
For a steady-state flow in a confined aquifer, Thiem's equation is used:Given:
- (drawdown at well face)
- (radius of influence, where drawdown )
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