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

2. Outline
Purpose
Land Use
Lake System
Conclusions
Future Work

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

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

5. Land Use (cont)

6. Land Use (cont)
Farmland
Pastureland

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

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

9. Lake System (cont)
Trace Upstream
Trace Path

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

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

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

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