Question Bank • QB_SUB_SWCE_0148 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Hydrology

Subtopic: Runoff estimation

Question Statement:

A 4-hour Unit Hydrograph (UH) has a peak discharge of $30.0\text{ m}^3\text{/s}$. For an isolated storm of 4-hour duration producing $3.5\text{ cm}$ of direct surface runoff, the peak discharge of the direct runoff hydrograph (in $\text{m}^3\text{/s}$) is:

Answer Key:

105.0

Step-by-Step Solution & Explanation

By the principle of linearity and superposition in Unit Hydrograph theory: $Q_{\text{peak}} = Q_{\text{UH, peak}} \times R = 30.0 \times 3.5 = 105.00\text{ m}^3\text{/s}$
← Previous (QB_SWCE_ADV_126) Next (QB_SWCE_004) →

Practice In Authentic CBT Exam Interface

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

Launch CBT Mock Test