Question
Download Solution PDFA rainfall of 1.6 cm occurred in a 5-hour storm, and the Φ-index was 0.20 cm/hour. How much was the rainfall excess?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
ϕ Index:
- It gives the total runoff depth of a catchment is defined as the constant infiltration capacity that would yield the actual total runoff for a given rainfall amount and is represented as
Φ = (P-R/t)
Φ-Index = (Precipitation-Total Runoff Depth/Duration of Excess Rainfall)
Calculation:
Rainfall excess = i = P - Φ × t
i = 1.6 - 0.20 × 5 = 0.6 cm = 6 mm
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