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GATE Exam Questions - Engineering

Q1:

In a river, discharge is 173 m3/s; water surface slope is 1 in 6000; and stage at the gauge station is 10.0 m. If during a flood, the stage at the gauge station is same and the water surface slope is 1 in 2000, the flood discharge in m3/s, is approximately

A 371

B 100

C 519

D 300

ANS:D - 300

q1/q2=(s2/s1)^2.
q2=173/(2000/6000)^2,
q2=299.9~300.