Question- A peak flow of a flood hydrograph due to a 6 hour storm is 470 m³/s. The corresponding average depth of rainfall is 8 cm. Assume an Infiltration loss of 0.25 cm/hour and a constant base flow of 15 m³/s. What is the peak discharge of 6 hour unit hydrograph for this Catchment?

Question- A peak flow of a flood hydrograph due to a 6 hour storm is 470 m³/s. The corresponding average depth of rainfall is 8 cm. Assume an Infiltration loss of 0.25 cm/hour and a constant base flow of 15 m³/s. What is the peak discharge of 6 hour unit hydrograph for this Catchment?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.6P

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Concept explainers

Unit Hydrograph

Hydrology is the science which deals with the study of water on the earth’s surface. The word Hydrograph is derived from the word hydro which means water. Hydrograph is basically a graph in which the discharge is plotted against the time interval at a specific point in a river or other channel. In a hydrograph, the discharge is plotted along the y-axis and time interval is plotted along the x-axis. Hydrograph is used to estimate the runoff. The variations in discharges with the change in time is shown by a hydrograph. It was revealed that the total discharge at an outlet increases with time by a kinematic wave model.

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