Question

1. Determine the peak runoff rate from a 10-acre parking lot near Columbia, SC with the following characteristics: overland length = 98 ft; shallow concentrated flow length = 450 ft; uniform parking lot slope = 1.5% and gutter slope of 1%. The parking lot and gutter are paved with asphalt. The design rainfall return period is 10 years.            Apply the Rational Method to find the design peak flow rate.

Peak runoff rate is ___________ cfs.

Answer 1

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