The flood hydrograph (resulting hydrograph) due to a 6 -h storm is 470 m³/s. The average depthof rainfall is 8 cm. Assume an average infiltration loss of (-0.25 cm/h) and a constant base flowof 15 m³/s, estimate the direct runoff hydrograph (DRH) and the discharge of the 6 -h unithydrograph (UH) for this catchment.

Peak flow Average depth Infiltration loss =0.25 cm/h,Base flow It is required to find the peak…

Answered: of 15 m/s, estimate the direct runoff…

of 15 m/s, estimate the direct runoff hydrograph (DRH) and the discharge of the 6 -h unit hydrograph (UH) for this catchment.

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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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.

Question

The flood hydrograph (resulting hydrograph) due to a 6 -h storm is 470 m³/s. The average depth
of rainfall is 8 cm. Assume an average infiltration loss of (-0.25 cm/h) and a constant base flow
of 15 m³/s, estimate the direct runoff hydrograph (DRH) and the discharge of the 6 -h unit
hydrograph (UH) for this catchment.

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