Surface Water-Groundwater Interactions in the Upper Brazos River Basin of Texas and Quantitative Relationship to Smalleye and Sharpnose Shiner Reproductive Success
Final Performance Report February 17, 2017 – August 31, 2019 As Required By The Endangered Species Program Texas Grant Number 493010 Federal Grant No. TX E-185-R-1 Surface water-groundwater interactions in the upper Brazos River basin of Texas and quantitative relationship to Smalleye and Sharpnose Shiner reproductive success Prepared by: Brad D. Wolaver, Ph.D. Carter Smith Executive Director Craig Bonds Director, Inland Fisheries August 31, 2019 Texas Parks & Wildlife Department | 1 QAe8583 Personnel Principal Investigator(s): Brad D. Wolaver1 Consulting TPWD Project Coordinator: Kevin B. Mayes Other Project Personnel: Lindsay V. Reynolds2, Todd G. Caldwell3; Tara Bongiovanni1; Jon Paul Pierre1; Azadeh Gholoubi1. (1) Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX (UT-BEG). (2) Consulting Research Hydrologist at Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX. As of Fall 2019: Lead Riparian Ecologist, Bureau of Land Management, National Operations Center, Lakewood, CO. (3) UT-BEG; Currently: U.S. Geological Service, Nevada Water Science Center, 2730 N Deer Run Rd, Carson City, NV Location(s): Upper Brazos River Basin, Texas Objective(s): This study (1) calculates flow metrics to understand how the flow regime has been altered by reservoir construction, groundwater development, or climate variability (such as droughts), (2) evaluates groundwater-surface water interactions and long-term groundwater inflows to streams, and (3) uses mixed-effects regression models and Poisson regression to assesses the relative importance of surface water utilization, groundwater development, and environmental factors in affecting streamflow regimes. Specifically, this study met these objectives by accomplishing this work: 1.
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