Question Bank • QB_SWCE_EXP_043 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Soil and Water Erosion

Subtopic: Vegetative waterways

Question Statement:

A vegetative grassed waterway is designed to carry a peak discharge of $3.6\text{ m}^3\text{/s}$ at a permissible velocity of $1.5\text{ m/s}$. The required flow cross-sectional area of the waterway in $\text{m}^2$ is ________ (round off to 1 decimal place).

Answer Key:

2.4

Step-by-Step Solution & Explanation

From continuity equation $Q = A \times V$: $A = \frac{Q}{V} = \frac{3.6\text{ m}^3\text{/s}}{1.5\text{ m/s}} = 2.4\text{ m}^2$
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