1. Erosion Patterns in Austin Streams
GIS Term Project
Fall 2002

2. Background City of Austin study Previous Research Flooding vs. Erosion
Phase 1 Watersheds Study Area Map
City of Austin study
Previous Research
Flooding vs. Erosion
City of Austin, 1997

3. Erosion Endangers Property

4. Past Channel Expansion in Little Walnut Creek
Source: Raymond Chan & Associates, October 1997

5. Erosion Affects Water Quality
Erosion can cause safety problems

6. Erosion Processes Fluvial Geomorphology
The study of how the physical characteristics of a river or stream interact with the climate, geology, topography, vegetation and land use of the watershed

8. Erosion Processes Dynamic Equilibrium Regime Flows Stable
In Transition
In Adjustment
Regime Flows
Land Use Changes
Dams

9. Erosion Processes Stream Classification Rosgen
Channel Geometry vs. Basin Area
City of Austin study
Ratio of Expansion vs.
Percent Impervious Cover

10. Austin Erosion Assessment
Stream Classification
Stability Index
Ratio of Enlargement
Predicted Future Ratio
Overall Problem Score

12. GIS Data Input