Estimate the runoff from 140 mm of rainfall on a 350-ha watershed. The land use is open with a grass cover before urbanization. The soil is 45% group B and 55% group C. The curve numbers for open land with grass cover are 69 for Group B and 79 for Group C. After urbanization, the surface runoff is reduced by 100 mm. How much additional runoff is caused by urbanization?
Estimate the runoff from 140 mm of rainfall on a 350-ha watershed. The land use is open with a grass cover before urbanization. The soil is 45% group B and 55% group C. The curve numbers for open land with grass cover are 69 for Group B and 79 for Group C. After urbanization, the surface runoff is reduced by 100 mm. How much additional runoff is caused by urbanization?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Estimate the runoff from 140 mm of rainfall on a 350-ha watershed. The land use is open with a
grass cover before urbanization. The soil is 45% group B and 55% group C. The curve numbers
for open land with grass cover are 69 for Group B and 79 for Group C. After urbanization, the
surface runoff is reduced by 100 mm. How much additional runoff is caused by urbanization?
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