1. GIS Study of Hydrologic Impacts on Ventura River Flood Plain
By: Warrior Nation
Photo Courtesy:NOAA

2. Study Area of Ventura River
Image Courtesy:NASA World Wind, Google Earth

3. Look at the impact of flooding physically and socially
Original Goals
Create a flood prediction
- no enough data
- not right software (Hec Ras)
Manning equation
- not right equipment to collect correct data
- too many variables left unknown
Look at the impact of flooding physically and socially

4. Forced to change direction of project
So…
Forced to change direction of project

5. New Goals Look at the Physical impacts of the 1995 flood
Assess damage of flood
Make map with ground truth data of 1995 flood called verbal flood map
Categorize the 1995 flood we mapped as a 100 or 500 year flood

6. Measuring Ground Truth G.P.S. Points
Visit the Study Area
Measuring Ground Truth G.P.S. Points
Methods

7. Photo Courtesy:NOAA

10. Interviewing locals to determine 95’ Flood Height
Ryan Graham at Ventura trailer park with his tape measure
Methods

12. Locating USGS Flow Stations

13. Methods

14. Digitizing the FEMA floods

16. Categorizing flood

18. IMPACTS

19. Impacts of 1995 flood

21. Do they look different?
Below: 500 yr map
Above: 100 yr map

22. Roads inside the 100 year flood plain
Overlaid by clipping in analysis tools

23. CONCLUSIONS!

24. The 95 flood was closer to the 500 year flood than the 100 year
Tourism and road impact
miles road damage for 100 yr flood
$34.5 million to repair
mi damage for 500 yr flood
 $49.5 million to repair
80 sq miles of urban area impacted by flood zone

25. Data Acquisition:
U.S. Census Bureau Tiger/Line Files
ASTER Digital Elevation Model: Courtesy Ted Eckman, NASA Affiliated Researcher
USGS Population Density: Courtesy Diego Pedreros U.S.G.S.
Ventura County GIS: Contour and Stream Bed shapefile
Google Earth

26. Josh Bader Ted Eckman Diego Pedreros Michael Goodchild
Special Thanks to:
Josh Bader
Ted Eckman
Diego Pedreros
Michael Goodchild

27. GO WARRIORS!
2007 – 2008!

28. We Believe