The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the p-indexfor the storm can be assumed to be 3 cm/day, the total direct runoff from the catchment is(А) 20 сm(В) 11 ст10 cmD) 22 cm

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Answered: The rainfall on five successive days on…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A lake had a water surface elevation of 110.00m above datum at the beginning of a certain month. In that month, the lake received an average flow of 66.0m3 /s from surface runoff sources. In the same period the outflow from the lake had an average value of 66.5m3 /s. Further, in that month, the lake received a rainfall of 150mm and the evaporation from the lake surface was estimated as 7.40cm. Write the water budget equation for the lake and calculate the water surface elevation of the lake at the end of the month. The average lake surface area can be taken as 5000ha. Assume that there is no contribution to or from the ground water storage
Net Storm Rainfall Example 2-1 Rain falls as shown in the rainfall hyetograph (intensity Vs. time) in Fig. E2-1 (a). The o index for the Storm is 0.5 in./hr and is constant over 5 hr. Plot the net rainfall on the hydrograph (flow vs. time) given in Fig. E2-1 (a). Determine the total volume of runoff and the watershed area. 1cfs = 1.008 ac-in/hr 2.0 1.5 1.0 0.5 1 3. 4 Time (hr) 700 600 500 400 300 200 100 4 8 12 16 20 24 Time (hr) Time (hr) Q (cfs) Volume (cfs-hr) 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 20-22 22-24 24-26 16 Q (cfs) iT (in./hr)

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The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the p-index for the storm can be assumed to be 3 cm/day, the total direct runoff from the catchment is (А) 20 сm (В) 11 ст 10 cm D) 22 cm