Question Bank • QB_SWCE_EXP_094 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Watershed Management

Subtopic: Water budgeting in watershed

Question Statement:

In an annual watershed water budget equation $P = Q + ET + \Delta S$, the annual precipitation is $P = 1100\text{ mm}$, stream runoff is $Q = 350\text{ mm}$, and the increase in basin groundwater storage is $\Delta S = 50\text{ mm}$. Calculate the annual evapotranspiration ($ET$) in $\text{mm}$.

Answer Key:

700

Step-by-Step Solution & Explanation

$ET = P - Q - \Delta S = 1100 - 350 - 50 = 700\text{ mm}$
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