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An Integrated Stream Classification System for the State of Texas

This project outlines an integrated stream classification system for Texas, focusing on environmental flows and their management. Key data sources, including the Environmental Flows Information System, NHDPlus, water quality datasets, and climatological data, are combined to analyze hydrology, geomorphology, and biological diversity. The study utilizes an extensive dataset with 7.6 million entries and explores future work in geologic integration and statistical tests. A review of the Texas Instream Flow Program enhances understanding of ecological impacts and regulatory compliance.

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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.

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