Water Supply Engineering
According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

All listed here
Nurses home and medical quarters
Boarding schools
hostels

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

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

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