GATE CE 2023 Set 1 — Question 59
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Water Resources Engineering → Hydrology & Precipitation → Infiltration
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Question
A 12-hour storm occurs over a catchment and results in a direct runoff depth of 100 mm. The time-distribution of the rainfall intensity is shown in the figure (not to scale). The -index of the storm is (in mm, rounded off to two decimal places) ____________________________.
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Solution
Total Runoff mm.
Total Rainfall mm.
Runoff for .
Let the times where be and .
From the graph:
Runoff is the area of the trapezoid above :Solving for :
Total Rainfall mm.
Runoff for .
Let the times where be and .
From the graph:
Runoff is the area of the trapezoid above :Solving for :
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