A Multi-Disciplinary Approach to Protecting Instream Flows and Endemic Species in the Devils River, Texas

Authors: Sarah Robertson

Year: 2018

Abstract

The Devils River is a groundwater-dominated, semi-arid river in southwest Texas and is considered one of the most pristine rivers in the state. It is one of the last strongholds for multiple species of regionally endemic freshwater fauna including the federally-listed Devils River Minnow and Texas Hornshell. However, the potential for large-scale groundwater pumping in the watershed and prolonged droughts pose threats to groundwater availability and the springflows that sustain river baseflows. Development of a comprehensive basin-wide fish and mussel conservation plan including instream flow recommendations is ideal due to the relatively small size of the watershed. However, challenges include the isolated location of the river and the low proportion of publicly held lands for implementing on-the-ground conservation measures. To best determine science needs, focus resources, and increase informed stewardship of the river, Texas Parks and Wildlife Department has partnered with governmental agencies, universities, non-profit organizations, and landowners interested in preserving this unique resource. Through collaborative research aimed at a better understanding of groundwater-surface water interactions and instream flow needs of endemic species, and by building cooperative partnerships, steps are underway to preserve the aesthetic, ecological, and recreational values of the Devils River.