GATE 2023 AR — Architecture – Question 39

Infrastructure, Services and Utilities · Surface water runoff estimate, Discharge from streams and rivers · 2 marks · Multiple select

Which quantities are required in the Rational Method for estimating peak runoff?

Rainfall intensity
Runoff coefficient
Flow velocity
Hydraulic depth

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Show answer and explanation

Correct answer: (A) Rainfall intensity; (B) Runoff coefficient

Explanation

The Rational Method is Q=CIA with appropriate unit conversion. Rainfall intensity I and runoff coefficient C are required, A, B, along with catchment area. Velocity and hydraulic depth are channel-flow variables rather than direct inputs to this equation.

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