Allied & ICAR Exam Bank • ALLIED_0445 NAT • 2 Marks

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrograph Analysis and Watershed Routing

Question Statement:

A watershed of area $A = 25\text{ km}^2$ has total stream channel length of $\sum L = 75\text{ km}$. The drainage density $D_d = \sum L / A$ in $\text{km/km}^2$ (or $\text{km}^{-1}$) is:

Answer Key:

3

Step-by-Step Solution & Explanation

$D_d = 75 / 25 = 3.0\text{ km}^{-1}$.
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