Hydrology and Runoff

Drainage density $D_d$ of a watershed of total stream length $\sum L$ and basin area $A$ is expressed as:

Options:

• (A) $D_d = \frac{\sum L}{A}$
• (B) $D_d = \frac{A}{\sum L}$
• (C) $D_d = \frac{\sum L}{\sqrt{A}}$
• (D) $D_d = \frac{A}{P^2}$