Question
Download Solution PDFA direct runoff hydrograph due to a storm idealized into a triangular shape has a peak flow rate of 60 m3/s occurring at 25 hours from its start. If the base width of this hydrograph is 72 hours, and the catchment area is 777.6 km2, the runoff from the storm is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Hydrograph
It is used to measure runoff discharge. The area under the discharge and time curve gives the volume of runoff.
Calculation:
Catchment Area = 777.6 km2 = 777.6 x 106 m2
Total volume of water = Area of Hydrograph
Total volume = 0.5 x 72 x 60 x 3600 = 7776000 m3
Runoff = Volume / Area = \(={ {7776000}\over{777.6\times10^6}}\)
Runoff = 0.01 m = 1 cm
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