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GATE Civil Engineering (CE) 2021 Shift 1 Solved Paper

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Question : 60

Total: 65

A tube - well of 20 cm diameter fully penetrates a horizontal, homogenous and isotropic confined aquifer of infinite horizontal extent. The aquifer is of 30 m uniform thickness. steady pumping at the rate of 40 litres/s from the well for a long time results in a steady drawdown of 4 m 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 245 m. The hydraulic conductivity of the aquifer (in m/day, round of to integer) is _______.

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