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Hydrology & Irrigation

Methods of Maximum Flow Calculation-Part-2

A catchment h...

Question

A catchment has an area of 150 hectares and a run-off/rainfall ratio of 0.40. If due to 10 cm rainfall over the catchment, a stream flow at the catchment outlet lasts for 10 hours, what is the average stream flow in the period?

A

60.000 m^{3} / h r

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B

100 m^{3} / m i n u t e

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C

3.5 m^{3} / h r

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D

1.33 m^{3} / h r

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Solution

The correct option is B $100 m^{3} / m i n u t e$
$Runoff = 150 \times 10^{4} \times 0.4 \times 0.1 = 60, 000 m^{3} Average stream flow = \frac{60, 000}{10 \times 60} = 100 m^{3} / m i n u t e$

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