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An Integrated Stream Classification System for the State of Texas

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  1. An Integrated Stream Classification System for the State of Texas Eric S. Hersh Term Project, CE394K.2 May 1, 2007

  2. Environmental Flows Information System: Data Model Thematic Layers NHDPlus Water Quality Climatology Hydrology & Hydraulics Geomorphology & Physical Processes Biology

  3. NRC “Physical Settings for Instream Flows” National Research Council Committee (2005). The Science of Instream Flows: A Review of the Texas Instream Flow Program. The National Academies Press, Washington, D.C.

  4. NRC Qualitative Variables

  5. CRWR Quantitative Variables


  6. TCEQRegulatoryActivities and ComplianceSystem: SurfaceWaterQualityMonitoring 7.6 million values 733,000 sampling events 7,138 stations 1,072 parameters 1968 - 2006

  7. SWQM: Top 15 Parameters by Result Prepared by Tyler Jantzen, CRWR

  8. Carcharhinus limbatus (Blacktip shark) Carcharhinus leucas (Bull shark) Alligator mississippiensis (American alligator) Charismatic Megafauna

  9. 918 gages 730 > 1 year 558 > 10 yrs 427 > 20 yrs

  10. USGS WaterWatch • 22,380 gages • Updated annually • 30+ yrs of data

  11. Future Work • Testing of NRC regionalization • Geologic integration • Additional correlation and redundancy testing (geostatistics?) • PET • Flowline versus subbasin representation

  12. Acknowledgements • Tyler Jantzen, Ernest To, Clark Siler, and David Maidment, CRWR • Adam Czekanski, EWRE • Wendy Gordon, TCEQ

  13. Questions?

  14. References • Kolbe, C.M. (2005). A Guide to Freshwater Ecology. Texas Commission on Environmental Quality, Austin, Texas. • National Research Council Committee (2005). The Science of Instream Flows: A Review of the Texas Instream Flow Program. Committee on Review of Methods for Establishing Instream Flows for Texas Rivers, National Research Council. The National Academies Press, Washington, D.C. • Saraeva, E. (2006). Development of an Instream Flow-Based Extrapolation Procedure for the Nooksack Watershed. Dissertation, Utah State University. Advisor: T.B. Hardy.