Desalination and ASR Feasibility Assessment

The Barton Springs/Edwards Aquifer Conservation District (BSEACD or the District) was formed to conserve, protect, and enhance the groundwater resources in its jurisdictional area, which covers the unconfined (recharge) zone and the confined zone of the Barton Springs segment of the Edwards Aquifer in central Texas. The Edwards Aquifer has been considered a vast source […]

Groundwater Flow Systems in Multiple Karst Aquifers of Central Texas

Increased demand for groundwater in central Hays County is prompting studies to evaluate the availability of groundwater in the Trinity Aquifers of central Texas. These aquifers, consisting mostly of limestone, dolomite, and marl, exhibit varying degrees of karstification. Near the surface, karst features such as caves and sinkholes are evident, but are widely scattered. Even […]

Groundwater Level Monitoring Results for HTGCD Transducer Wells and Wimberley Valley Public Water Supply Wells, Hays County, Central Texas

The Trinity Aquifer of central Texas is a critical groundwater resource for water supply, ecological, and recreational uses. However, limited continuous water level data exists to characterize the aquifer system. Accordingly, in 2008, the Hays Trinity Groundwater Conservation District (HTGCD) initiated a water level monitoring program across central Hays County that involved installing continuous data […]

Recharge and Water-Quality Controls for a Karst Aquifer in Central Texas

The Edwards Aquifer is a prolific karst aquifer system in Central Texas that provides drinking water to about 2 million people. Because a significant portion of the water recharging the Barton Springs segment of the Edwards Aquifer enters the subsurface through caves and enlarged fractures in the bed of Onion Creek, the presence of nonpoint source […]

Hydrogeology of the Saline Edwards Zone, Southeast Travis County, Central Texas

Summary Increased demand for water in central Texas is causing water users and providers to look for additional sources of water. The saline portion of the Edwards Aquifer (saline Edwards Aquifer) has often been mentioned as a source of water for desalination or aquifer storage and recovery (ASR). The resource has not previously been considered […]

Cover-Collapse Sinkhole Development in the Cretaceous Edwards Limestone, Central Texas

Sudden cover-collapse sinkhole (doline) development is uncommon in the karstic Cretaceous-age Edwards limestone of central Texas. This paper presents a case-study of a sinkhole that formed within a stormwater retention pond (SWRP) in southwest Austin. Results presented include hydrogeologic characterizations, fate of stormwater, and mitigation of the sinkhole. On January 24, 2012, a 11 cm […]

Status Report for Aquifer Storage and Recovery Pilot Project: Ruby Ranch Water Supply Corporation, Hays County, Central Texas

The Ruby Ranch Water Supply Corporation (RRWSC) and the Barton Springs/Edwards Aquifer Conservation District (District) cooperated on a project to test the Middle Trinity Aquifer as a reservoir for storage and recovery of fresh Edwards Aquifer groundwater. In March 2017, the Texas Commission on Environmental Quality (TCEQ) granted permission to conduct an ASR pilot project […]

30 Years of Aquifer Science

Summary document (Fact Sheet 08-2017) of the major categories of District scientific studies and their implications for aquifer management. Compiled in honor of the District’s 30 year anniversary since it was created in 1987.

Surface-water and Groundwater Interactions in the Blanco River and Onion Creek Watersheds: Implications for the Trinity and Edwards Aquifers of Central Texas

Recent groundwater studies reveal complex surface and groundwater interactions within the streams that link the Trinity and Edwards Aquifers of the Hill Country and Balcones Fault Zone. Current numerical models do not adequately account for these interactions. The purpose of this paper is to summarize recent studies within the Blanco River and Onion Creek watersheds. […]

Hydraulic Conductivity Testing in the Edwards and Trinity Aquifers Using Multiport Monitor Well Systems, Hays County, Central Texas

Hydraulic conductivity is one of the defining characteristics of hydrostratigraphic units. Detailed and quantified permeability information from the units comprising the Edwards and Trinity Groups is lacking in central Texas. These rock groups comprise important karstic and fractured carbonate aquifers. To better manage water resources and understand fate and transport of contaminants, the hydraulic parameters […]