A 200-acre urban drainage area consists of three different watershed areas as follows: (i) 100-acre of Flat residential (30% impervious area); (ii) 60-acre of Moderately steep residential (50% impervious area); and (iii) 40-acre of Flat commercial (90% impervious area) = 20%. Using the rational formula, determine the runoff rate for a storm of 100-year frequency. Assume that the FHWA/NJ-82-004 rainfall intensity curves are applicable to this drainage area and the following land characteristics apply: fallow or minimum tillage cultivation ground cover with 3% average slope of overland area. Overland flow length = 0.5 miles.
A 200-acre urban drainage area consists of three different watershed areas as follows: (i) 100-acre of Flat residential (30% impervious area); (ii) 60-acre of Moderately steep residential (50% impervious area); and (iii) 40-acre of Flat commercial (90% impervious area) = 20%. Using the rational formula, determine the runoff rate for a storm of 100-year frequency. Assume that the FHWA/NJ-82-004 rainfall intensity curves are applicable to this drainage area and the following land characteristics apply: fallow or minimum tillage cultivation ground cover with 3% average slope of overland area. Overland flow length = 0.5 miles.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A 200-acre urban drainage area consists of three different watershed areas as follows: (i) 100-acre of Flat residential (30% impervious area); (ii) 60-acre of Moderately steep residential (50% impervious area); and (iii) 40-acre of Flat commercial (90% impervious area) = 20%. Using the rational formula, determine the runoff rate for a storm of 100-year frequency. Assume that the FHWA/NJ-82-004 rainfall intensity curves are applicable to this drainage area and the following land characteristics apply: fallow or minimum tillage cultivation ground cover with 3% average slope of overland area. Overland flow length = 0.5 miles.
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