The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by
A)direct runoff volume
B)period of storm
C)total rainfall
D)none of the above

Question

Quizplus · Accepted Answer

The unit hydrograph is obtained by dividing the ordinates of the direct runoff hydrograph by the direct runoff volume, making it a representation of the runoff from one unit (usually one inch or one centimeter) of rainfall excess occurring uniformly over the basin for a specified duration.

The Unit Hydrograph Due to a Storm May Be Obtained