GATE CE 2022 Set 1 — Question 56
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Water Resources Engineering → Hydrographs & Groundwater → S-Curve Hydrograph
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Question
A two-hour duration storm event with uniform excess rainfall of 3 cm occurred on a watershed. The ordinates of streamflow hydrograph resulting from this event are given in the table.
Considering a constant baseflow of 10 m/s, the peak flow ordinate (in m/s) of one-hour unit hydrograph for the watershed is ________ . (in integer)
| Time (hours) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| Streamflow () | 10 | 16 | 34 | 40 | 31 | 25 | 16 | 10 |
Correct answer
12 to 12
Solution
1.Calculate Direct Runoff Hydrograph (DRH) by subtracting baseflow ():
DRH ordinates: (at hours)2.This DRH is for excess rainfall in .
ordinates (divide DRH by ):3.Use S-curve method to find :
-curve ordinates :Continue learning with Success Tracker
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