10.2190/UT0R-2LK9-RC0D-Q7RR UT0R2LK9RC0DQ7RR 6 Estimating Non-Point Pollutant Loadings—II: A Case Study in the Fall Creek Watershed, New York 81 95 20020509 20020509 20020509 20020509 UT0R2LK9RC0DQ7RR.pdf http://baywood.metapress.com/link.asp?target=contribution&id=UT0R2LK9RC0DQ7RR 1 A. K. Dikshit Daniel P. Loucks Indian Institute of Technology, Kharagpur, India Cornell University, Ithaca, New York 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. A. K. Dikshit and D. P. Loucks, Estimating Non-Point Pollutant Loadings—I: A Geographical-Information-Based Non-Point Source—Simulation Model, <i>Journal of Environmental Systems, 24</i>:4, pp. 395-408, 1995-96. A. K. Dikshit, <i>Estimating Non-Point Source Pollutant Loadings Using Geographic Information Systems</i>, Ph.D. Dissertation, School of Civil and Environmental Engineering, Cornell University, Ithaca, New York, 1994. D. P. Loucks and A. K. Dikshit, Interactive Simulation of Water Quantity and Quality in River Systems, in <i>Proceedings of 2nd International Conference on System Analysis in Water Quality Management and Clinic on Computer Simulation of Environmental Processes (WATERMATEX'91)</i>, University of New Hampshire, Durham, New Hampshire, 1991. D. P. Loucks, P. N. French, and M. R. Taylor, <i>IRAS: A User Manual</i>, School of Civil and Environmental Engineering, Cornell University, Ithaca, New York, 1993.