) 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)
) 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)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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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