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

hostels
All listed here
Nurses home and medical quarters
Boarding schools

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Water Supply Engineering
Time of concentration

time taken for the storm water to travel from the most remote point to the drain.
time taken for all the ran off to reach the drain
duration of rainfall.
is the time taken, for precipitation

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