Question Bank • QB_SWCE_EXP_065 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Soil and Water Erosion

Subtopic: Gully control structures – drop, drop inlet and chute spillways

Question Statement:

A straight drop spillway has a rectangular weir crest of length $L = 3.0\text{ m}$. For a design head over crest $H = 0.80\text{ m}$, calculate the peak discharge capacity in $\text{m}^3/\text{s}$ using the broad-crested weir formula $Q = 1.77 L H^{3/2}$.

Answer Key:

3.797

Step-by-Step Solution & Explanation

$H^{3/2} = (0.80)^{1.5} \approx 0.71554$ $Q = 1.77 \times 3.0 \times 0.71554 = 5.31 \times 0.71554 \approx 3.7995\text{ m}^3/\text{s}$
← Previous (QB_SUB_SWCE_0007) Next (QB_SWCE_ADV_001) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test