1. Wildfire Risk Assessment: Western Travis County, Texas Integrating GIS and Fire Modeling Jennifer Perry CE 394K GIS

2.  Spatially and temporally simulate the spread and behavior of fires.  GIS based data input  Simulate weather, fuels, heterogeneous terrain  Simulate attack scenarios Fire Simulator

3.  Digital Elevation Model  Slope  Aspect  Fuels  Canopy Density Required GIS Raster Files.LCP file

4.  Digital Elevation Models Required GIS Raster Files  Downloaded from TNRIS – Digital Data site  USGS Mansfield Dam Quadrangle 30 meter resolution  UTM – NAD 27 projection

5.  Slope Required GIS Raster Files  Derived from DEM using ArcView Spatial Analyst  USGS Mansfield Dam Quadrangle 30 meter resolution  UTM – NAD 27 projection

6.  Aspect Required GIS Raster Files  Derived from DEM using ArcView Spatial Analyst  USGS Mansfield Dam Quadrangle 30 meter resolution  UTM – NAD 27 projection

7.  Fuels Required GIS Raster Files

8.  Fuels Required GIS Raster Files  USGS LULC vector file in digital degrees  Clipped against Mansfield Dam quad  Projected into UTM – NAD 27  Converted to grid based on DEM

9.  Canopy Cover Required GIS Raster Files  Interpolated from LULC grid  Expressed as percent density  Projected into UTM – NAD 27  Converted to grid based on DEM

10.  5-6 acre brush fire  September 4, 2000  Record high of 110 0 F Field Site

11. Extent of Fire Lake Travis

12. FARSITE Simulation Chagoopa.LCP Ignition conditions: Elevation = 2208 m Slope = 29 0 Aspect = 135 0 Fuel = 7 Southern Rough Chaparral (2-6 ft) Canopy Cover = 1 500 m Closed Timber Litter Exposed Rock Southern Rough Chaparral Short grass 1ft

13. FARSITE Simulation Fire characteristics: Duration: 1 day T = 80 0 F, no wind Time step: 30 minutes Visible time step: 2 hours 500 m

14. What’s Left?  Compile Mansfield Dam raster files into.LCP file  Use FARSITE to convert Fuel Model from standard Anderson criteria to Fire Behavior Fuel Model  Run simulation based on Labor Day Fire  Overlay roads.shp and hydrants.shp to determine effectiveness of attack

15. Thanks to Brian Quinlan, Hudson Bend Fire Department, for access to GIS files