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Question

In a river carrying a discharge of 142 m3/s , the stage at a station A was 3.6 m and the water surface slope was 1in 6000. If during a flood, the stage at A was 3.6m and the water surface slope was 1 in 3000, what was the flood discharge (approximately)?

A
284 m3/s
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B
200 m3/s
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C
164 m3/s
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D
96 m3/s
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Solution

The correct option is B 200 m3/s
Discharge is directly proportional to
S.
Q2=Q1×S2S1
=142×13000×6000
=200.8 m3/s

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