A small watershed consists of 1.5 km² of cultivated area (c=0.2), 2.5 km² under forest (c = 0.1) and 1 km² under grass cover (c=0.35). There is a fall of 20 m in a watercourse of length 2 km. The 1-D-F relation for the area is given by I=- 807-02 0.5 (+12) ;I in cm/hr, T- yr, tin minutes. Estimate the peak rate of runoff for a 25-year frequency.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A small watershed consists of 1.5 km² of cultivated area (c=0.2), 2.5 km² under forest (c =
0.1) and 1 km² under grass cover (c = 0.35). There is a fall of 20 m in a watercourse of
length 2 km. The 1-D-F relation for the area is given by I=-
807-02
;I in cm/hr, T- yr, tin
minutes. Estimate the peak rate of runoff for a 25-year frequency.
(+12)
0.5
Transcribed Image Text:A small watershed consists of 1.5 km² of cultivated area (c=0.2), 2.5 km² under forest (c = 0.1) and 1 km² under grass cover (c = 0.35). There is a fall of 20 m in a watercourse of length 2 km. The 1-D-F relation for the area is given by I=- 807-02 ;I in cm/hr, T- yr, tin minutes. Estimate the peak rate of runoff for a 25-year frequency. (+12) 0.5
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