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GATE 2020 AG – Question 31

Irrigation and Drainage Engineering · Agricultural Drainage · 1 mark · Numerical answer

A 720 ha watershed has drainage coefficient 1.2 cm per day. Find design drain discharge in m³/s.

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Correct answer: 1 to 1

Explanation

Daily water volume is 720×10000×0.012=86400 m³. Dividing by 86400 s/day gives discharge 1 m³/s. The coefficient is interpreted as the design daily depth, as required by the grading.

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