Question Bank • QB_SWCE_EXP_088 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Watershed Management

Subtopic: Rainwater harvesting

Question Statement:

A rooftop rainwater harvesting system collects rain from a corrugated GI sheet roof of horizontal catchment area $150\text{ m}^2$. The seasonal rainfall is $800\text{ mm}$ ($0.80\text{ m}$) and the runoff coefficient of the roof is $0.85$. Calculate the volume of water harvested in $\text{m}^3$.

Answer Key:

102

Step-by-Step Solution & Explanation

$V = A \times P \times C = 150\text{ m}^2 \times 0.80\text{ m} \times 0.85 = 120 \times 0.85 = 102.0\text{ m}^3$
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