Water Supply Engineering
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is

2.50 m
2.25 m
2 m
3.00 m

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Water Supply Engineering
While determining the yield of open wells by the pumping test

Working head is generally limited to ?rd of the critical depression head
Depression head resulting at critical velocity, is called critical depression head
Velocity of recharging water, increases with depression head
Maximum safe yield of an open well, is expected at critical depression head

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