Civil Engineering MCQAE Level Civil Engineering
The phi-index of a storm is the infiltration rate such that:
HydrologyWater Resources Engineering and IrrigationHARD
Choose the correct answer
A
rainfall above it equals direct runoff depth
B
it equals average evaporation
C
rainfall below it equals flood peak
D
it equals base flow
Correct Answer
A. rainfall above it equals direct runoff depth
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Phi-index is chosen so that rainfall excess above the index equals the observed direct runoff depth.
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