Question

Determine the time of concentration for overland flow on a small watershed in the southeast. The watershed is characterized by timberland with deep forest litter. The hydraulic length of the overland flow is 280 m and the elevation change is 20 m. What is the watershed time of concentration?

Answer 1

time of concentration fea tot ft where, for overland t t travel flow time (minutes) time (onlautes) 10,47 6= 0.00 le 0.83 ty Neis coelt, of Roughness (0.8 for Humberland with deep . forest lister) L= overland flow teryth (= 280m = 918.6354) se over and stope (= 80 80 = 14 Put all values, ) to = 0.8% / 0.8% 918.695 10:47 l lă jos & (to = 34.32 minutes)

방 0.77 = 0.0678 (soos 10.77 3.71 ft = 0.0078 1 9 18,635 La jocs alt=4-121 minutes) - time of concentration fc = 24.32+ 4.121 a He= 38.44 minutes)

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