a mean annual runoff 1 m3/s from a catchment of area 10 - Practice (English)

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a mean annual runoff 1 m3/s from a catchment of area 10 - Practice (English) | ObjectiveMcq

PracticeHydrologyPrecipitationa mean annual runoff 1 m3/s from a ...

Precipitation HydrologyEasy

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a mean annual runoff 1 m3/s from a catchment of area 10 km2 represents an effective rainfall of

Correct Answer: B — 315.4 cm

Explanation:

Given: Runoff = 1 m3/sec Catchment area = 10 km2 Calculations: Effective rainfall = $\frac{Mean\;Annual\;Rainfall}{Catchment\;Area}$ Mean Annual Rainfall = 1 m3/sec Ã— 365 Ã— 24 Ã— 60 Ã— 60 Catchment Area = 10 km2 = 10 Ã— 106 m2 Effective rainfall = $\frac{{1 \times 365 \times 24 \times 60 \times 60 }}{{10 \times {{10}^6}}} =3.1536\;m= 315.4\;cm$

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