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. 30 – Middle Colorado River Bioassessment (PDF 5.6 MB)
• River Studies Report No. 29 – Upper Red River Basin Bioassessment (PDF 20.4 MB)
• River Studies Report No. 28 – Frio River Biology and Fluvial Geomorphology (PDF 25.3 MB)
• River Studies Report No. 27 – Middle and Lower Neches River Basin Bioassessment (PDF 4.7 MB)
• River Studies Report No. 26 – Canadian River Bioassessment (PDF 2.1 MB)
• River Studies Report No. 25 – Village Creek Watershed Bioassessment (PDF 4.3 MB)
• River Studies Report No. 24 – Cypress Basin Bioassessment, Marion and Harrison Counties (PDF 2.3 MB)
• River Studies Report No. 23 – Upper Frio River Basin Bioassessment (PDF 1.5 MB)
• River Studies Report No. 22 – Fish Assemblage and Water Quality in the San Antonio River, Texas, between Floresville and Goliad (PDF 4.8 MB)
• River Studies Report No. 21 – Response of Water Quality and the Aquatic Community to a Reverse Osmosis Unit Discharge into the Wichita River, Texas (PDF 1.2 MB)
• 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 (PDF 1.1 MB)
• River Studies Report No. 19 – Status of Biotic Integrity, Water Quality, and Physical Habitat in Wadeable East Texas Streams (PDF 9.7 MB)
• River Studies Report No. 18 – An Investigation of Off-Road Vehicle Impacts on Nueces River Fish Assemblages in Uvalde and Zavala Counties, Texas (PDF 1.1 MB)
• River Studies Report No. 17 – Regionalization of the Index of Biotic Integrity for Texas Streams (PDF 10.5 MB)
• River Studies Report No. 16 – An Evaluation of Spring Flows to Support the Upper San Marcos Spring Ecosystem, Hays County, Texas (PDF 2.6 MB)
  • Aquatic Macrophyte Map Set (PDF 4 MB)
  • Mesohabitat Map Set (PDF 1.3 MB)
• 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 (PDF 1.1 MB)
• 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 (PDF 295.3 KB)
• 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 (PDF 654.9 KB)
• River Studies Report No. 09 – Relationship Between Fishes and Water Quality in the Pecos River, Texas (PDF 297.7 KB)
• 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 (PDF 5.2 MB)
• River Studies Report No. 06 – Fisheries Use Attainability Study for Pine Island Bayou (Segment 0607) (PDF 384.7 KB)
• River Studies Report No. 05 – Fisheries Use Attainability Study for Cow Bayou (Segment 0511) (PDF 234.5 KB)
• River Studies Report No. 04 – Fisheries Use Attainability Study for Bosque River (PDF 470.2 KB)
• River Studies Report No. 03 – Fisheries Use Attainability Study for Oyster Creek (Segment 1110) (PDF 246.1 KB)
• River Studies Report No. 02 – Fisheries Use Attainability Study for Nolands River (River Segment 1227) (PDF 254 KB)
• River Studies Report No. 01 – Fisheries Use Attainability Study for Hillebrandt Bayou (PDF 254 KB)

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 (PDF 90.2 KB)
• Using Water Availability Models to Assess Alterations in Instream Flows (October 2003 revised draft) (PDF 1.2 MB)