Reports on River Studies

The following reports are available in PDF format. Contact the River Studies Program at (512) 754-6844 to request a report on compact disk. As an alternative, many reports can be downloaded directly from this page.

• River Studies Report No. 35 – Bear Creek State Park Aquatic Resources Report
• River Studies Report No. 34 – Post Oak Ridge State Park Aquatic Resources Assessment and Recommendations
• River Studies Report No. 33 – Little River Watershed Bioassessment
• River Studies Report No. 32 – Least Disturbed Sreams Project: An Extension of the Texas Aquatic Ecoregion Project
  • Executive Summary, Introduction, Methods & Results
  • Ecoregion 24
  • Ecoregions 25 & 26
  • Ecoregions 27, 29, & 32
  • Ecoregion 30
  • Ecoregion 31
  • Ecoregions 33 & 35
  • Ecoregion 34
  • Summary & References
  • Appendix A – Status of Waterbodies
  • Appendix B – In-Channel & Riparian Physical Habitat
  • Appendix C – Water Quality
  • Appendix D – Fish Species List
  • Appendix E – Benthic Macroinvertebrate Species List
• River Studies Report No. 31 – Effects of a Catastrophic Flood on Macroinvertebrate Populations and Guadalupe Bass Recruitment in Two Central Texas Rivers
• River Studies Report No. 30 – Middle Colorado River Bioassessment
• River Studies Report No. 29 – Upper Red River Basin Bioassessment
• River Studies Report No. 28 – Frio River Biology and Fluvial Geomorphology
• River Studies Report No. 27 – Middle and Lower Neches River Basin Bioassessment
• River Studies Report No. 26 – Canadian River Bioassessment
• River Studies Report No. 25 – Village Creek Watershed Bioassessment
• River Studies Report No. 24 – Cypress Basin Bioassessment, Marion and Harrison Counties
• River Studies Report No. 23 – Upper Frio River Basin Bioassessment
• River Studies Report No. 22 – Fish Assemblage and Water Quality in the San Antonio River, Texas, between Floresville and Goliad
• River Studies Report No. 21 – Response of Water Quality and the Aquatic Community to a Reverse Osmosis Unit Discharge into the Wichita River, Texas
• River Studies Report No. 20 – North Fork Guadalupe River from the Upstream Boundary of the Kerr Wildlife Management Area to the Farm-to-Market 1340 Bridge Crossing at Mo-Ranch
• River Studies Report No. 19 – Status of Biotic Integrity, Water Quality, and Physical Habitat in Wadeable East Texas Streams
• River Studies Report No. 18 – An Investigation of Off-Road Vehicle Impacts on Nueces River Fish Assemblages in Uvalde and Zavala Counties, Texas
• River Studies Report No. 17 – Regionalization of the Index of Biotic Integrity for Texas Streams
• River Studies Report No. 16 – An Evaluation of Spring Flows to Support the Upper San Marcos Spring Ecosystem, Hays County, Texas
  • Aquatic Macrophyte Map Set
  • Mesohabitat Map Set
• River Studies Report No. 15 – Aquatic Survey Results from Seven Texas National Guard Training Installations
• River Studies Report No. 14 – Classification of Texas Freshwater Fishes into Trophic and Tolerance Groups
• River Studies Report No. 13 – Effects of Change in Spring Lake Headgate Elevation on Water Levels in the San Marcos River, Hays County, Texas
• River Studies Report No. 12 – A Fisheries Inventory and Assessment of Allens Creek and the Brazos River, Austin County, TX
• River Studies Report No. 11 – Macroinvertebrate Assessment of Allens Creek and the Brazos River, Austin County, Texas
• River Studies Report No. 10 – Effects of Dechlorination of Municipal Wastewater Effluents on Fish Communities in the Trinity River, Texas
• River Studies Report No. 09 – Relationship Between Fishes and Water Quality in the Pecos River, Texas
• River Studies Report No. 08 – Current Status of Notropis buccula and Notropis oxyrhynchus in Texas
• River Studies Report No. 07 – Water Quality and Fish Assemblages in the Trinity River, Texas, between Fort Worth and Lake Livingston
• River Studies Report No. 06 – Fisheries Use Attainability Study for Pine Island Bayou (Segment 0607)
• River Studies Report No. 05 – Fisheries Use Attainability Study for Cow Bayou (Segment 0511)
• River Studies Report No. 04 – Fisheries Use Attainability Study for Bosque River
• River Studies Report No. 03 – Fisheries Use Attainability Study for Oyster Creek (Segment 1110)
• River Studies Report No. 02 – Fisheries Use Attainability Study for Nolands River (River Segment 1227)
• River Studies Report No. 01 – Fisheries Use Attainability Study for Hillebrandt Bayou

Draft Report

Several outside experts previously reviewed a draft report entitled “Using Water Availability Models to Assess Alterations in Instream Flows.” A summary of TPWD's responses to the reviewer’s comments is posted here, along with a revised draft report for further comment and review.

• TPWD Responses to Issues Raised in Technical Peer Review
• Using Water Availability Models to Assess Alterations in Instream Flows (October 2003 revised draft)