a watershed is characterized by the following parameters:
mean annual precipitation = 18 inches
drainage area = 1.7 mi.2
NRCS curve number CN = 88
percent of watershed impervious = 50%
commercial land use as a percent of watershed area = 10%
industrial land use as a percent of watershed area = 15%
residential land use as a percent of watershed area = 63%
nonurban land use as a percent of watershed area = 12%
a particular storm resulted in 2.6 inches of rain falling on the watershed. Estimate the mean concentration, in mg/1, and load, in kg, in the storm runoff for the following water quality constituents: chemical oxygen demand (COD), total nitrogen (TN), dissolved phosphorus (DP), and recoverable lead (PB).
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