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Leona River

Leona River. SELECT Modeling and Potential Bacteria Sources. Texas Institute for Applied Environmental Research Stephenville, Texas January 24, 2013. Acknowledgements. Lead Agency - Texas Soil & Water Conservation Board Support provided by Nueces River Authority

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Leona River

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

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

  3. Modeling Bacteria Sources • 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

  4. SELECT • 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

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

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

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

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

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

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

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

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

  13. Potential Sources in the Leona • 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?

  14. Potential Sources in the Leona • 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?

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

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

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

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

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

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