Premium
MODELING THE BUILDUP AND WASHOFF OF POLLUTANTS ON URBAN WATERSHEDS 1
Author(s) -
Barbé D. E.,
Cruise J. F.,
Mo X.
Publication year - 1996
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1996.tb04049.x
Subject(s) - environmental science , pollutant , hydrology (agriculture) , surface runoff , watershed , nonpoint source pollution , stormwater , storm , antecedent moisture , water quality , runoff curve number , geology , meteorology , geography , ecology , chemistry , geotechnical engineering , organic chemistry , machine learning , computer science , biology
A model for urban stormwater quality was developed in this study. The basis for the model is the process by which pollutants build up on the watershed surface. For the wet climate of the study site, it was assumed that there exists an interval of time over which the pollutant buildup equals the pollutant washoff (no accumulation of pollutant). The buildup model was represented by a linear function of the antecedent dry time. The buildup function was then linked with a pollutant washoff model represented by a power function of the storm runoff volume. Various time intervals for no net accumulation were tested to calibrate the model. The model was calibrated to observed data for two small urban basins in Baton Rouge, Louisiana, and model results were used to analyze the behavior of phosphorus concentrations in storm runoff from these basins over a long period of time.