Question

Why does high drainage density have a short path of overland flow?

Answer 1

Answer on Question #82757 - Geography - Physical geography

Why does high drainage density have a short path of overland flow?

Answer

Look at the expression describing drainage density:

$$Drainage density = \frac {1}{2 \cdot length of overland flow}.$$

Plot a graph of this function:

Figure 1 Dependence of drainage density on overland flow

Since the drainage density is reciprocal to two times of the length of overland flow, the shorter the flow is – the higher is the density.