When developing a watershed protection plan (WPP) or a total maximum daily load (TMDL), it is often difficult to accurately assess pollutant loads and sources for a watershed because insufficient water quality monitoring data are available. According to the Texas Commission on Environmental Quality, there are 274 bacterial impairments in Texas water bodies out of a total of 438 impaired water bodies. Bacterial data are often sparse, which hinders the development of WPPs or TMDLs. To address this lack of data, the Spatially Explicit Load Enrichment Calculation Tool (SELECT) was used to develop WPPs for 3 rural watersheds in Texas that are impaired due to E. coli bacteria: Buck Creek, 5 subwatersheds of Little Brazos River, and Lampasas River. SELECT is an automated geographical information system tool that can assess potential bacteria sources and relative loads in watersheds using spatial factors such as land use, population density, and soil type. The results show how the SELECT methodology was applied and adapted to each watershed based on stakeholder concerns and data availability.
Citation: Borel KE, Karthikeyan R, Smith PK, Gregory LF, Srinivasan R. 2012. Estimating daily potential E. coli loads in rural Texas watersheds using Spatially Explicit Load Enrichment Calculation Tool (SELECT). Texas Water Journal. 3(1):42-58. Available from: https://doi.org/10.21423/twj.v3i1.6164.
[AVMA] American Veterinary Medical Association. 2002. U.S. Pet Ownership and Demographics Source Book. Schaumberg (Illinois): Center for Information Management, American Veterinary Medical Association.
Berg M, McFarland M, Dictson N. 2008. The Plum Creek Watershed Protection Plan. The Plum Creek Watershed Partnership [Internet]. College Station (Texas): Texas AgriLife Extension Service; [cited 2012 May 3]. Available from: http://pcwp.tamu.edu/media/4715/PCWPPdraft8_7_08.pdf
Doyle M, Erikson M. 2006. Closing the door on the fecal coliform assay. Microbe. 1(4):162-163.
Fraser RH, Barten PK, Pinney DA. 1998. Predicting stream pathogen loading from livestock using a geographical information system-based delivery model. Journal of Environmental Quality. 27(4):935-945.
Gregory LF. In Press. Buck Creek Watershed Protection Plan [Internet]. College Station (Texas): Texas Water Resources Institute. Technical Report: TR-420.
Lockwood M. 2005. White-tailed deer population trends. Austin (Texas): Texas Parks and Wildlife Department. W-127-R-14.
Munafo M, Cecchi G, Baiocco F, Mancini L. 2005. River pollution from nonpoint sources: a new simplified method of assessment. Journal of Environmental Management. 77(2): 93-98.
Schumacher JG. 2003. Survival, transport, and sources of fecal bacteria in streams and survival in land-applied poultry litter in the upper Shoal Creek basin, southwestern Missouri, 2001–2002. Rolla (Missouri): U.S. Department of the Interior, U.S. Geological Survey. 39 p.
[TCEQ] Texas Commission on Environmental Quality. 2000. Texas 2000 Clean Water Act Section 303(d) List [Internet]. Austin (Texas): Texas Commission on Environmental Quality; [cited 2012 April 23]. Available from: http://www.tceq.texas.gov/assets/public/compliance/monops/water/00_303d.pdf
[TCEQ] Texas Commission on Environmental Quality. 2010. 2010 Texas Integrated Report for Clean Water Act Sections 305(b) and 303(d) [Internet]. Austin (Texas): Texas Commission on Environmental Quality; [cited 2012 April 23]. Available from: http://www.tceq.texas.gov/waterquality/assessment/10twqi/10twqi
[TCEQ] Texas Commission on Environmental Quality. 2012. Water & Sewer Certificates of Convenience and Necessity Service Areas & Facility Lines [Internet]. Austin (Texas): Texas Commission on Environmental Quality; [cited 2012 May 3]. Available from: http://www.tceq.texas.gov/gis/boundary.html
Teague A, Karthikeyan R, Babbar-Sebens M, Srinivasan R, Persyn RA. 2009. Spatially explicit load enrichment calculation tool to identify potential E. coli sources in watersheds. Transactions of the American Society of Agricultural and Biological Engineering. 52(4):1109-1120.
Texas Association of Counties. 2011. Population of Texas Cities and Towns Sorted by County [Internet]. Austin (Texas): Texas Association of Counties; [cited 2011 April 3]. Available from: http://www.county.org/about-texascounties/county-data/Documents/towns.html
[USCB] U.S. Census Bureau. 2000. Census 2000 TIGER/Line® Files [Internet]. Washington (District of Columbia): US Census Bureau; [cited 2009 Aug 24]. Available from: http://www.census.gov/geo/www/tiger/tiger2k/tgr2000.html
[USDA-NASS] U.S. Department of Agriculture National Agricultural Statistics Service. 2007. 2007 Census of agriculture: county data. Washington (District of Columbia): USDA National Agricultural Statistics Survey.
[USDA-NRCS] U.S. Department of Agriculture-Natural Resources Conservation Survey. 2004 Soil Survey Geographic (SSURGO) Database [Internet]. Washington (District of Columbia): U. S. Department of Agriculture National Resource Conservation Service. 2004 [cited 2009 Aug 4]. Available from: http://soils.usda.gov/survey/geography/ssurgo
[USEPA] U.S. Environmental Protection Agency. 2001a. Protocol for developing pathogen TMDLs: source assessment. 1st edition. Washington (District of Columbia): U.S. Environmental Protection Agency, Office of Water. p. 5-1–5-18. EPA 841-R-00-002.
[USEPA] U.S. Environmental Protection Agency. 2001b. The national costs of the total maximum daily load program (draft report). Washington (District of Columbia): U.S. Environmental Protection Agency, Office of Water. EPA 841-D-01-003.
[USEPA] U.S. Environmental Protection Agency. 2008. Causes of impairment for 303(d) listed waters [Internet]. Washington (District of Columbia): U.S. Environmental Protection Agency; [cited 2012 April 24]. Available from: http://ofmpub.epa.gov/tmdl_waters10/attains_nation_cy.control?p_report_type=T#causes_303d
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2012 Kyna E. Borel, R. Karthikeyan, Patricia K. Smith, Lucas F. Gregory, Raghavan Srinivasan