Allied & ICAR Exam Bank • ALLIED_0431 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrograph Analysis and Watershed Routing

Question Statement:

An S-curve hydrograph reaches an equilibrium discharge $Q_e$ when rainfall excess continues indefinitely. For a catchment area $A = 72\text{ km}^2$ and rainfall excess rate $1\text{ cm}$ in $2\text{ hours}$ ($0.5\text{ cm/h}$ or $0.005\text{ m/h}$), the equilibrium discharge in $\text{m}^3/\text{s}$ is:

Answer Key:

100

Step-by-Step Solution & Explanation

$Q_e = \frac{720,000}{7200} = 100.0\text{ m}^3/\text{s}$.
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