Tracing Groundwater Flowpaths in the Vicinity of San Marcos Springs, Texas

Steve Johnson
Geary Schindel
George Veni


This report presents the findings of investigations between 2002 and 2010 by the Edwards Aquifer Authority (EAA) regarding groundwater flowpaths in the San Marcos Springs springshed. In addition, it describes a collaborative investigation with the Barton Springs Edwards Aquifer Conservation District (BSEACD) and the City of Austin Watershed Protection and Development Review Department (COA) to define and understand the groundwater boundary between San Marcos Springs in the southern segment of the Edwards Aquifer and Barton Springs in the Barton Springs segment of the Edwards Aquifer.