Allied & ICAR Exam Bank • ALLIED_0427 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrograph Analysis and Watershed Routing

Question Statement:

A $4\text{-hour}$ unit hydrograph of a catchment has a peak discharge of $25\text{ m}^3/\text{s}$. If an effective rainfall of depth $4.0\text{ cm}$ occurs over the catchment in $4\text{ hours}$, the peak discharge of the resulting direct runoff hydrograph in $\text{m}^3/\text{s}$ is:

Answer Key:

100

Step-by-Step Solution & Explanation

By principle of linearity, $Q_{peak} = 4.0 \times 25 = 100.0\text{ m}^3/\text{s}$.
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