Record Display for the EPA National Library Catalog
RECORD NUMBER: 26 OF 40
|OLS Field Name||OLS Field Data|
|Main Title||Modeling nonpoint pollution from the land surface|
|Author||Donigian, Anthony S. ; Crawford., Norman H.|
|CORP Author||Hydrocomp Inc., Palo Alto, Calif.;Environmental Research Lab., Athens, Ga.|
|Report Number||EPA-600/3-76-083; R803315-01-0; EPA-R-803315-01-0|
|Stock Number||PB-257 089|
|Additional Subjects||Stream pollution ; Stream flow ; Land development ; Mathematical models ; Watersheds ; Sites ; Runoff ; Sources ; Water quality ; Urban areas ; Computerized simulation ; Land use ; Sedimentation ; Channel improvements ; Sediment transport ; Rural areas ; North Carolina ; Wisconsin ; Washington(State) ; Computer programs ; FORTRAN ; NPS model ; Organic loadings ; Durham(North Carolina) ; Madison(Wisconsin) ; Seattle(Washington) ; Nonpoint Source Pollution Loading Model ; Nonpoint sources|
Development and initial testing of a mathematical model to continuously simulate pollutant contributions to stream channels from nonpoint sources is presented. The Nonpoint Source Pollutant Loading (NPS) Model is comprised of subprograms to represent the hydrologic response of a watershed, including snow accumulation and melt, and the processes of pollutant accumulation, generation, and washoff from the land surface. The simulation of nonpoint pollutants from both pervious and impervious areas is based on sediment as a pollutant indicator. The calculated sediment washoff is multiplied by user-specified 'potency factors' that indicate the pollutant strength of the sediment for each pollutant simulated. Both urban and rural areas can be simulated. Initial testing of the NPS Model was performed on three urban watersheds in Durham, North Carolina; Madison, Wisconsin; and Seattle, Washington.
Prepared under Grant No. R803315-01-0 for the Office of Research and Development, Environmental Research Laboratory. Also issued as EPA 600/3-76-083.