Water Supply Engineering
When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied

All listed here
By gravitational system
By pumping system
Both (A) and (B)

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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.
duration of rainfall.
is the time taken, for precipitation
time taken for all the ran off to reach the drain

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