Paper by W. P. Gallimore and W

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Presentation transcript:

Integrating GIS with a Modified Universal Soil Loss Equation to Support Watershed Management Paper by W. P. Gallimore and W. Xiang. 1991. Papers & Proceedings of Applied Geography Conferences, 14: 198-202. Presented by Kaylyn Siporin, Environmental Studies Major, GEOG 370, 2/26/08

Use of Watershed Models Problem Watersheds are the basic unit for water quality management in an area. The evolution of ecological and environmental characteristics within a watershed are subject to natural processes and human activities. Few studies exist that use GIS to predict the future of watersheds. Hypothesis A basic GIS model of a watershed can assist in watershed management by producing future scenarios and impacts.

Properties of watersheds that relate to future management Use of Arc/Info for the development of a watershed decision support system for the seven sub-basins of the Mountain Island Watershed in northern Mecklenburg County, North Carolina http://pix.epodunk.com/locatorMaps/nc/NC_216206.gif

Organization of Data Data sources include USGS 7.5 minute topographic maps, the Mountain Island Conservancy, the Mecklenburg County EPA Office, and a private engineering firm Data organization in three divisions: Physical Land Use Environmental

Calculation of Potential Soil Loss Measured the watershed’s potential for soil erosion with the Modified Universal Soil Loss Equation PSL= R x K x LS x LUCC Overlay was created by adding soil, slope, land use, and sub-basin together

Results Future land use scenarios could be generated Natural State Model vs. Maximum Build Model The resulting scenarios defined the environmentally sensitive areas and provide information to better control future development