) Calculate the discharge from a tubewell of 20-cm diameter penetrating fully into a confined aquifer of 20-m thick and having a permeability of 40 m/day. The drawdown in the well is 3 m and zero drawdown at 300 m from the well. If the diameter of the well is doubled, find the percentage increase in the yield, the other conditions remaining the same. State the assumntions in the formula vou use (1303 7 1nm)

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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(b) Calculate the discharge from a tubewell of 20-cm diameter penetrating fully into a confined
aquifer of 20-m thick and having a permeability of 40 m/day. The drawdown in the well is
3 m and zero drawdown at 300 m from the well.
If the diameter of the well is doubled, find the percentage increase in the yield, the other
conditions remaining the same.
State the assumptions in the formula you use.
Ans:
(1303.7 lpm)
Transcribed Image Text:(b) Calculate the discharge from a tubewell of 20-cm diameter penetrating fully into a confined aquifer of 20-m thick and having a permeability of 40 m/day. The drawdown in the well is 3 m and zero drawdown at 300 m from the well. If the diameter of the well is doubled, find the percentage increase in the yield, the other conditions remaining the same. State the assumptions in the formula you use. Ans: (1303.7 lpm)
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