determine the time of concentration for a flow which travels 50 m over average grass on...

determine the time of concentration for a flow which travels 50 m over average grass on a slope of 5 percent and 100 m over concrete pavement with a slope of 1 percent.

Solutions

Expert Solution

we can solve this problem by using the kirpich equation

Kirpich equation:

Time of concentration

Where K is kirpich adjustment factor

G=0.0078

L- Longest length of watershed

S= slope

Ground Cover	Kirpich Adjustment Factor, k
General overland flow and natural grass channels	2
Overland flow on bare soil or roadside ditches	1
Overland flow on concrete or asphalt surfaces	0.4
Flow in concrete channels	0.2

Time of concentration over grass =1.005 minutes =60.30 seconds

Time of concentration over concrete=0.3185 minutes =19.11 seconds

Ally Wells answered 4 months ago

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