Hydrogeologic data from a study of the freshwater zone/salinewater zone interface in the Edwards Aquifer, San Antonio region, Texas

Pavlicek, D.J.; Small, T.A.; Rettman, P.L.

doi:10.3133/ofr87389

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…In the Madison Aquifer, montane recharge from outcrops in the Black Hills and Rocky Mountains injects a plume of fresh water that becomes longitudinally mineralized toward sedimentary basins, such as the Williston Basin [48]. In the Edwards Aquifer, rivers and streams in the Texas Hill Country provide recharge along the Balcones Escarpment into down-stepping fault blocks where a wedge of largely fresh water overlies or is upgradient of a mineralized zone at depth or where the Edwards is confined [49]. In the Floridan aquifer, an upper lens of freshwater resides atop a mineralized lower component [47].…”

Section: Discussionmentioning

confidence: 99%

Divergent Geochemical Pathways of Carbonate Aquifer Evolution in a Classic Karst Terrain: (2) Groundwater Source Delineation Using Regional Water Chemistry Data

Burgess,

Branam,

Florea

2023

Water

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Springs provide ideal monitoring points for groundwater chemistry, which are important for managing groundwater resources. The chemistry of these spring waters aggregate geochemical reactions along the flow path. In this paper, part two of a two-part investigation, 104 perennial springs in the classic karst landscape of the Mitchell Plateau, Indiana, USA were sampled at base flow. Many of these springs are historically important for domestic, agricultural, commercial, and recreational use. Multifactor analysis of field measurements, principal ions, and stable isotopes revealed five primary clusters of springs emerging from the Mitchell Aquifer. Two clusters represented earth-alkaline-type karst groundwater that were discriminated by temperature and inorganic carbon concentration. Two other clusters comprised mineralized alkaline-earth-type groundwater with excess alkalis and elevated sulfate. The fifth cluster appeared to be groundwater that included meteoric and mineralized sources. Using the longitudinal data over two years from part one of this investigation, two mixing lines were used to describe the data set. The mixing lines pointed to sources of sulfur in mineralized springs from deep brines and from evaporite dissolution. Collectively, these regional data allow for a better delineation of water types and differentiation between the Upper and Lower Mitchell Aquifer.

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Section: Discussionmentioning

confidence: 99%

Divergent Geochemical Pathways of Carbonate Aquifer Evolution in a Classic Karst Terrain: (2) Groundwater Source Delineation Using Regional Water Chemistry Data

Burgess,

Branam,

Florea

2023

Water

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Hydrogeology and ground-water flow in the Edwards-Trinity aquifer-system, west-central, Texas

Kuniansky¹,

Ardis²

1997

Professional Paper

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The RASA Program represents a systematic effort to study a number of the Nation's most important aquifer systems, which, in aggregate, underlie much of the country and which represent an important component of the Nation's total water supply. In general, the boundaries of these studies are identified by the hydrologic extent of each system and, accordingly, transcend the political subdivisions to which investigations have often arbitrarily been limited in the past. The broad objective for each study is to assemble geologic, hydrologic, and geochemical information, to analyze and develop an understanding of the system, and to develop predictive capability that will contribute to the effective management of the system. The use of computer simulation is an important element of the RASA studies to develop an understanding of the natural, undisturbed hydrologic system and the changes brought about in it by human activities and to provide a means of predicting the regional effects of future pumping or other stresses. The final interpretive results of the RASA Program are presented in a series of U.S.

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Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas

Barker¹,

Bush²,

Baker³

1994

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Because the diagenetic effects of cementation, recrystallization, and mineral replacement diminish the hydraulic conductivity of most rocks composing the Trinity and Edwards-Trinity aquifers, transmissivity values average less than 10,000 feet squared per day over more than 90 percent of the study area. However, the effects of tectonic fractures and dissolution in the Balcones fault zone cause transmissivity values to average about 750,000 feet squared per day in the Edwards aquifer, which occupies less than 10 percent of the study area.

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Hydrogeologic data from a study of the freshwater zone/salinewater zone interface in the Edwards Aquifer, San Antonio region, Texas

Abstract: Water level 4/ above land-surface datum (ft)

Cited by 5 publications

References 3 publications

Divergent Geochemical Pathways of Carbonate Aquifer Evolution in a Classic Karst Terrain: (2) Groundwater Source Delineation Using Regional Water Chemistry Data

Divergent Geochemical Pathways of Carbonate Aquifer Evolution in a Classic Karst Terrain: (2) Groundwater Source Delineation Using Regional Water Chemistry Data

Hydrogeology and ground-water flow in the Edwards-Trinity aquifer-system, west-central, Texas

Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas

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