Question

When the storm occurs once a year, the rainfall intensity R is ____________

(a) R = 300/t^0.625

(b) R = 150/t^0.625

(c) R = 150/t^2

(d) R = 300/t^2

I got this question in final exam.

The doubt is from Rational Method topic in section Water Supply for Building, Collection and Conveyance of Sewage, Waste Water Flow Rate of Environmental Engineering

Answer 1

The correct answer is (b) R = 150/t^0.625

The explanation: When the storm occurs once a year, the rainfall intensity R is given by R = 150/ t ^0.625 Where, t is the duration of storm in minutes.