Question

________ is the time required by flood discharge to reach the maximum limit.

(a) Storm frequency

(b) Run-off time

(c) Detention period

(d) Time of concentration

This question was addressed to me by my school principal while I was bunking the class.

I'm obligated to ask this question of Rational Method in section Water Supply for Building, Collection and Conveyance of Sewage, Waste Water Flow Rate of Environmental Engineering

Answer 1

The correct option is (d) Time of concentration

For explanation I would say: The time of concentration is defined as the longest time required for a drop of water to flow from the farthest point of drainage area to the point of concentration.