1. Sinkholes in Hernando County, Florida Photos taken by Tom Scott, Florida Geographic Survey http://www.dep.state.fl.us/geology/geologictopics/jacksonsink.htm Brett Buff GIS in Water Resources November 25, 2008

2. Objective Investigate the relationship between sinkholes and water Project Location Hernando County, Florida

3. Sinkholes Sinkholes are common in Florida Hydrogeology is an important factor in their formation Formed from erosion processes associated with acidic water and limestone Can form when water table changes drastically Can create underground drainage systems

4. Southwest Florida Water Management District (SWFWMD)

9. Future Work Create Sinkhole Probability Map Analyze DEM from Hernando County using ArcHydro9 Tools

10. Conclusion Sinkholes are more likely occur where water tables fluctuate more frequently and rapidly then normal Increase in development => Increase in groundwater removal => Increase sinkhole formation

11. Data Sources USGS Southwest Florida Water Management District Florida Department of Environmental Protection Florida Geological Survey

12. Eagle’s Nest Sinkhole Located in Northwest Hernando County

13. 330-Foot-Deep Sinkhole In Guatemala City

14. Questions??? Some more pictures of sinkholes in Florida