1. Leona River SELECT Modeling and Potential Bacteria Sources Texas Institute for Applied Environmental Research Stephenville, Texas January 24, 2013 1

2. Lead Agency - Texas Soil & Water Conservation Board Support provided by Nueces River Authority Texas A&M Dept Soil & Crop Sciences & Spatial Sciences Laboratory Acknowledgements

3. SELECT (Spatially Explicit Load Enrichment Calculation Tool) – Developed by Dept. of Biological and Agricultural Engineering and Spatial Sciences Laboratory at Texas A&M University by Dr. R. Karthikeyan, Dr. R. Srinivasan and others Modeling Bacteria Sources

4. Identifies potential bacteria loadings by subwatershed based on input data Spatial data, such as: – Land Use – Soils – Stream network provides a framework to visually representing input data and highlighting areas of potentially higher loadings SELECT

5. Population & Household Densities (Census data) Livestock Densities – Stakeholder Input – Agricultural Statistics (USDA) County level data Input Data

6. Wildlife (native & exotic) – Stakeholder Input – Resource Experts (TPWD & others) Domestic & Feral Animals – Stakeholder Input – Resource Experts (TPWD & others) Input Data

7. Source: Biological and Agricultural Engineering Department, Texas A&M University 7 Walnut Creek - Subwatersheds

8. Source: Biological and Agricultural Engineering Department, Texas A&M University 8 Walnut Creek - Potential E. coli loads

9. Source: Biological and Agricultural Engineering Department, Texas A&M University 9 Walnut Creek - Total Potential Daily E. coli load

10. Wastewater Treatment Facilities – Uvalde – Batesville – US Fish & Wildlife Service National Fish Hatchery Potential Sources in the Leona

11. Concentrated Animal Feeding Operations – Chaparral Cattle Feedlot (Uvalde) – Live Oak Feedlot (Batesville) Septage Sludge or Sewage Fields – None identified with permit review Potential Sources in the Leona

12. On-Site Sewage Facilities – What areas are on septic vs WWTF? – What kind of failures occur? – What is the “risk” of failure? Potential Sources in the Leona

13. Livestock based on County Statistics – Cattle & Calves (est. 28,000 head) – Goats(est. 6,000 head) – Sheep(est. 2,500 head) – Horses/Donkeys(est. 400 head) – Hogs(est. 100 head) Cattle, horses/donkey & hogs spread throughout Goats & Sheep primarily in Uvalde County Does this make sense for the watershed? Potential Sources in the Leona

14. What kinds of livestock operations primarily occur? – Cow/calf – Yearling What stocking rates are reasonable – For rangeland? – For improved pastureland? Are there other types of livestock or types of operations that should be considered? Potential Sources in the Leona

15. Wildlife & Exotics – Deer – population estimates? – Exotics – population estimates? Potential Unregulated Sources

16. Feral Hogs – How large is the feral hog problem in the Leona? – Where do the hogs primarily “hang out”? Potential Unregulated Sources

17. Domestic Animals – Usually consider only dogs – Assume 1 dog per household Does this make sense for the Leona watershed? Potential Unregulated Sources

18. Complete land use update with the Spatial Sciences Laboratory Obtain feedback on input information for SELECT http://www.leonariver.org/ Next Steps

19. Contact Information Nikki Jackson Email: njackson@tiaer.tarleton.edunjackson@tiaer.tarleton.edu Office Phone: 254.968.1920 Anne McFarland Email: mcfarla@tiaer.tarleton.edumcfarla@tiaer.tarleton.edu Office Phone: 254.968.9581

20. Questions? Thank You Anne McFarland Texas Institute for Applied Environmental Research mcfarla@tiaer.tarleton.edu 254.968.9581