Abstract

The need for a preliminary non-point source pollution management plan has become evident in the Onondaga Lake Watershed, which includes the City of Syracuse, NY, surrounding suburban areas and rural farmland. The rural contribution of Non-Point Source (NPS) pollution is being addressed by others. A spatial analysis of just the existing urban areas was conducted using the GRASS (Geographical Resources Analysis Support System) Geographic Information System (GIS). The results of this analysis were then used to construct a conceptual rainfall/runoff model of the urban watershed using the RUNOFF block of the Storm Water Management Model (SWMM). A continuous hydrologic simulation was then used to compute annual pollutant loads based on published unit area loads from other watersheds.

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