Estimating Non-Point Pollutant Loadings—II: A Case Study in the Fall Creek Watershed, New York
A. K. Dikshit
Daniel P. Loucks
DOI: 10.2190/UT0R-2LK9-RC0D-Q7RR
Abstract
A geographical information-based non-point source simulation model developed in part I of this series of articles is applied to the Fall Creek Watershed in New York. the ERDAS GIS has been used to obtain spatial data for the watershed. Daily weather data from Ithaca weather station from April 1982 to March 1993 have been used. the model simulated the hydrologic and non-point source processes and produced a daily-time series of estimated non-point source pollutant loadings of Nitrogen and Phosphorus to the Cayuga Lake. Four scenarios of land-use management or regional development, viz., land-uses as they are today, all rural land-uses as idle, all rural land-uses as corn, and all rural land-uses as residential, have been analyzed and relative impact on runoff, sediment, and pollutant loadings have been compared. the results indicate that the model can serve as a tool to assess the relative impacts of different land-use management policies and regional development scenarios.
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