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. 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)