Exam 8: Floods, Catchment, and Irrigation

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To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series i. mean value ii. standard deviation iii. length of record iv. coefficient of skew The correct answer is

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The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be

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If the demand line drawn from a ridge in a flow mass curve does not intersect the curve again, it indicates that

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A spoil bank is formed when the

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Which of the following methods is used to estimate flood discharge based on high water marks left over in the past ?

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