The use of unit hydrographs for estimating floods is generally li
|
The use of unit hydrographs for estimating floods is generally limited to catchments of size less than?
A. 5000 km<sup>2</sup>
B. 500 km<sup>2</sup>
C. 106 km<sup>2</sup>
D. 5000 ha
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Limitation of unit hydrographs:
Unit hydrograph assumes uniform distribution of rainfall over the catchment. Also the intensity is assumed constant for the duration of rainfall excess.
The unit hydrograph for estimating floods is generally limited to catchment of size less than 5000 km2. Very large sizes of catchment can give different direct runoff hydrograph (DRH) under otherwise identical situations.