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Determining the ordinate of the direct runoff hydrograph due to excess of 3.5 cm occurring in 6 hours
Time hrs. 0 3 6 9 12 15 18 24 30 36 42 48 54 60 69
Ordinates of 6 hrs. unit hydrograph (m3/s) 0 25 50 90 130 160 190 160 105 65 40 25 18 10 0

Mumbai University > Civil Engineering > Sem 7 > Irrigation Engineering

Marks: 10M

Year: May 2016

1 Answer
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Ordinate of x cm DHS = [ordinate of 6 hrs. unit hydrograph] X x

Time hrs. Ordinates of 6 hrs. unit hydrograph (m3/s) Ordinate of ‘x cm’ DRH
0 0 0
3 25 87.5
6 50 175
9 90 315
12 130 445
15 160 560
18 190 665
24 …

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