Karstbase Bibliography Database

The proceedings volume contains nine contributions presented during the Karst Conservation Initiative Meeting held in February 17, 2011 at The University of Texas at Austin.

The Edwards and Trinity Aquifers are critical water resources, supplying high-quality potable water to over two million people in the greater Austin-San Antonio region of central Texas, USA. These Cretaceous carbonate aquifers are hydrogeologically juxtaposed by extensive Miocene tectonic deformation associated with the Balcones Fault Zone, where the younger Edwards Group limestone has been downthrown relative to the older Trinity Group. The karstic aquifers are managed separately by regional water regulatory entities, and they have been historically treated as independent systems, both scientifically and from a water policy standpoint. Recent awareness of a significant interconnection between the Edwards and Trinity Aquifers has resulted in a number of hydrogeologic investigations documenting how they may actually operate as a single system. Studies related to upland recharge variability (spatial and temporal), stream loss, phreatic dye tracing, multi-port well monitoring, geochemistry, biologic habitat analysis, geophysics, and groundwater modeling indicate that the two are much less separated than previously observed. Summaries of these investigations conclude that changes in management strategies may be required to properly protect the quantity and quality of water in the Edwards and Trinity Aquifers.

Contents (click to open individual articles)

Introduction and Acknowledgements 

I nterconnection of the Edwards and Trinity Aquifers, Central Texas, U.S.A. 
Marcus O. Gary 

Spatial and Temporal Recharge Variability Related to Groundwater Interconnection of the Edwards and Trinity Aquifers, Camp Bullis, Bexar and Comal Counties, Texas 
Marcus O.Gary, George Veni, Beverly Shade, and Robin Gary

Potential for Vertical Flow Between the Edwards and Trinity Aquifer, Barton Springs Segment of the Edwards Aquifer 
Brian A. Smith and Brian B. Hunt

Could Much of Edwards Aquifer “Matrix Storage” Actually be Trinity Aquifer Contributions from the Blanco River? 
Nico M. Hauwert

Geophysical Correlation of Haby Crossing Fault (Medina County) and Mt. Bonnell Fault (Travis County) and Their Implications on T-E Interconnection 
Mustafa Saribudak

Edwards Aquifer – Upper Glen Rose Aquifer Hydraulic Interaction 
R.T. Green, F.P. Bertetti, and M.O. Candelario

Interaction Between the Hill Country Portion of the Trinity and Edwards Aquifers: Model Results 
Ian C. Jones

Using Tracer Testing Data for Resource Management Planning 
Geary Schindel and Steve Johnson

Demonstrating Interconnection Between a Wastewater Application Facility and a First Magnitude Spring in a Karstic Watershed: Tracer Study of the Tallahassee, Florida Treated Effluent Spray Field 2006-2007  
Todd R. Kincaid, Gareth J. Davies, Christopher L. Werner, and Rodney S. DeHan

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