A 6-hour rain of average intensity 2 cm/hour falls over the fern leaf type catchment as shown in Figure below. The time of concentration from the lines AA, BB, CC and DD are 1, 2, 3 and 4 hours, respectively, to the site 0 where the discharge measurements are made. The values of the runoff coefficient C are 0.5, 0.6, and 0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attain a constant value of 0.8 after 3 hours. Draw surface runoff hydrograph from the runoff collected from the catchment and also calculate volume of direct Runoff.

A 6-hour rain of average intensity 2 cm/hour falls over the fern leaf type catchment as shown in Figure below. The time of concentration from the lines AA, BB, CC and DD are 1, 2, 3 and 4 hours, respectively, to the site 0 where the discharge measurements are made. The values of the runoff coefficient C are 0.5, 0.6, and 0.7 for the 1st, 2nd and 3rd hours of rainfall respectively and attain a constant value of 0.8 after 3 hours. Draw surface runoff hydrograph from the runoff collected from the catchment and also calculate volume of direct Runoff.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 11P

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