Lake Travis: A GIS Study

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Presentation transcript:

Lake Travis: A GIS Study Bridget Wadzuk November 28, 2000

Outline Purpose Land Use Lake System Conclusions Future Work

Purpose Processes of Lake Travis Application Land Use Lake System Traces Hydrodynamics CE-QUAL-W2

Land Use Watershed USGS GIS Data Set Hydrologic Unit Maps (HUC) ArcView 3.2 ArcView Import71 Convert to Shapefile

Land Use (cont)

Land Use (cont) Farmland Pastureland

Land Use (cont) Population Growth 1980 ~ 450,000 1990 – 600,000 1980

Lake System ArcInfo 8.0 National Hydrography Dataset (NHD) Geometric Network Unconnected Segment Connected Segment

Lake System (cont) Trace Upstream Trace Path

Lake System (cont) Problems with trace Route.rch Route.drain Complex Edges Route.drain

Conclusions Agricultural Area = Nutrient Loading Animal Waste Fertilizers Urbanization and development causes increased pollution and flooding events

Conclusions (cont) Use traces to simulate transportation of water through the system ArcView vs. ArcInfo HUC vs. NHD

Future Work Apply results to CE-QUAL-W2 Use water quality data from the LCRA in GIS application

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