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Determine the ordinates of 12 hr unit hydrograph
written 7.3 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.3 years ago

The ordinates of a 4hr unit hydrograph are given below. Determine the ordinates of 12 hr unit hydrograph.

Time (hour) 0 4 8 12 16 20 24 28 32 36 40 44
Ordinates in m3/s 0 24 28 159 184 151 103 64 36 17 6 0

Mumbai University > Civil Engineering > Sem 7 > Irrigation Engineering

Marks: 9M

Year: Dec 2015
irrigation engineering
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written 7.3 years ago by gravatar for teamques10 teamques10 ★ 65k

Given $T_0 = 4hrs.$

$t_0 = 12 hrs.$

Since $t_0$ is an integral multiple of $T_0 (i.e. t_0 = 3T_0)$, the desired hydrograph can be obtained by taking the sum of the ordinates of three unit hydrographs of 4-hours duration, each lagging from the other by 4-hours, and dividing the …

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