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Given below in table Q4 are the ordinates of a 6-hr unit hydrograph for a catchment. Table Q4 Time (hr) 06 12 18 24 30 36 42 48 60 66 U.H 5.0 12.5 18.5 16.0 11.0 6.0 3.6 2.5 1.6 0.8 ordinate (m/sec) (i) Calculate the ordinates of the direct runoff hydrograph due to a rainfall excess of six (-hr consecutive storms); 3.5, 2.5, 1.5 cm. (ii) Estimate the peak discharge for this event.

Given below in table Q4 are the ordinates of a 6-hr unit hydrograph for a catchment. Table Q4 Time (hr) 06 12 18 24 30 36 42 48 60 66 U.H 5.0 12.5 18.5 16.0 11.0 6.0 3.6 2.5 1.6 0.8 ordinate (m/sec) (i) Calculate the ordinates of the direct runoff hydrograph due to a rainfall excess of six (-hr consecutive storms); 3.5, 2.5, 1.5 cm. (ii) Estimate the peak discharge for this event.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Given below in table Q4 are the ordinates of a 6-hr unit hydrograph for a catchment. Table Q4 Time (hr) 06 12 18 38 42 48 54 60 86 24 30 U.H 5.0 12.5 18.5 16.0 11.0 6.0 3.6 2.5 1.6 0.8 ordinate (m³/sec) (i) Calculate the ordinates of the direct runoff hydrograph due to a rainfall excess of six (-hr consecutive storms); 3.5, 2.5, 1.5 cm. (ii) Estimate the peak discharge for this event. (iii) Determine the total storm rainfall on this catchment if the catchment area is 20000 hectares and O-index is 1.0 cm/hr.
Transcribed Image Text:Given below in table Q4 are the ordinates of a 6-hr unit hydrograph for a catchment. Table Q4 Time (hr) 06 12 18 38 42 48 54 60 86 24 30 U.H 5.0 12.5 18.5 16.0 11.0 6.0 3.6 2.5 1.6 0.8 ordinate (m³/sec) (i) Calculate the ordinates of the direct runoff hydrograph due to a rainfall excess of six (-hr consecutive storms); 3.5, 2.5, 1.5 cm. (ii) Estimate the peak discharge for this event. (iii) Determine the total storm rainfall on this catchment if the catchment area is 20000 hectares and O-index is 1.0 cm/hr.
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