According to the edwards aquifer website, the contributing zone occurs on the edwards plateau, also called the texas hill country. This part of the edwards aquifer provides the municipal, industrial. These wells include watersupply, irrigation, and industrialsupply wells sited and tested for maximum yield. With a few exceptions in the city of austin, development is prohibited within water quality transition zones and critical water quality zones that are located over the south edwards aquifer recharge zone the portion of the recharge zone south of lake austin. The map on groundwater resources of the world unescobgr whymap.
Geren,member authorization for use or reproduction of any original. The aquifer basics web site provides a general summary of information published in the ground water. The aquifers are organized in the order of their magnitude of annual withdrawals, with the aquifer experiencing the largest amount of pumpage listed first. It shows various characteristic groundwater environments in their areal extent. There are forty plus species living in the aquifer with the salamander, and most of them are just as endangered as the salamander. Regional aquifer system analysisedwardstrinity aquifer system u. Edwards aquifer map viewer view the edwards aquifer maps of regulated zones with your web browser.
Hypogene processes in the edwards aquifer in southcentral. Edwards aquifer, central texas geosciences libguides. Development of the aquifer was controlled by changes. Introduction the edwards aquifer is one of our most valuable, irreplaceable, and endangered public treasures. The edwards aquifer of central texas is an extensive, karstified flow system developed in rocks deposited on a cretaceous limestone platform. Edwards aquifer maps and gis located in the heart of south central texas, the edwards aquifer is the natural water resource that supports approximately 2 million of us. The groundwater resources map of the world at the scale of 1. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology. Aquifer mapping program midregion council of governments, nm.
The edwards aquifer covers about 4530 square miles in parts of 11 counties in texas. Groundwater resources and global maps 10atlasgralmapsmrnwnw. To view a map of your area and discover if you are, indeed, located within the contributing zone. The act grants all of the powers, rights, and privileges necessary to manage, conserve, preserve, and protect the aquifer. Use the edwards aquifer map viewer to see the areas of texas that are subject to regulation by the tceq under the edwards aquifer protection program. It covers an area of approximately 4000 square miles stretching from rio grande river, near del rio, to the town of salado in bell county fig. Choose from 221 different sets of aquifer water flashcards on quizlet. Dockum aquifer groundwater availability model texas. At present, it is exploited from the tabuk plain in saudi arabia to wadi rum in jordan, in an area delineated in this inventory as the tabukmudawwaradisi area. Sep 26, 2017 the edwards aquifer literally is the life blood of the hill country. The edwards aquifer is one of the most prolific artesian aquifers in the world.
The san antonio segment of the aquifer extends in a 160 mile archshaped curve from brackettville in the west to near kyle in the northeast, and is between five and. In addition, the edwards aquifer feeds the comal and san marcos springs, provides. The vulnerability of the edwards aquifer, the high usage of the aquifer as a drinking water supply, and the presence of endangered species led the state of texas to formulate a regulatory structure to address development proposals in the earz and eacz to ensure aquifer water quality does not significantly degrade. This map is available at information services 1888askusgs. Openfile map ofm24 ranking values for aquifers and confining units in new jersey aquifer median rank yields gpm aquifers in new jersey can be ranked on their ability to yield ground water to highcapacity wells. In fact, this area would not have grown to what it is today without the aquifer. Regional aquifersystem analysisedwardstrinity aquifer system u. Open the map viewerbest viewed using internet explorer v9. An assessment of aquifer storage and recovery in texas. Located on the eastern edge of the edwards plateau in the u. The balcones fault zone edwards aquifer of southcentral texas is one of the most important karst aquifers in the united states and provides water to 1. Dockum aquifer groundwater availability model texas water. Prepared in support of a study by the center for research in water resources, university of texas at austin. If any of the species are lost from the system it will have an effect on the texas blind salamander.
Review of the edwards aquifer habitat conservation plan the edwards aquifer is the primary source of water for drinking and irrigation in the san antonio area, and supplies the two largest freshwater springs in texas, comal springs and san marcos springs. Edwards aquifer authority maps edwards aquifer authority. It is an update of the transboundary aquifers of the world map update 2014 igzac 2014. User guide this downloadable pdf document explains how to use the tools available in the viewer metadata the edwards aquifer maps come from official printed maps, containing regulatory boundaries based on previous geologic interpretations of the edwards aquifer zonesthat is, the recharge, transition, and contributing within the transition zones, as defined. Name meeting date meeting time meeting location meeting details agenda minutes video ecomment. The edwards balcones fault zone aquifer is a major aquifer in the southcentral part of the state. The edwards aquifer extends 400 kilometers from del rio, east to san antonio though austin, and northeast to bell county. Hydrology and water quality of the edwards aquifer associated with barton springs in the austin area, texas by raymond m. Edwards aquifer map mapping and geographic information systems. The edwards aquifer maps come from official printed maps, containing regulatory boundaries based on previous geologic interpretations of the edwards aquifer zonesthat is, the recharge, transition, and contributing within the transition zones, as defined in 30 tac 2.
Thats the historic average for october of the j17 well, 658 feet above sea level, the measure that influences everything related to the edwards aquifer. The edwards aquifer authority manages the san antonio segment of the balcones fault continue reading maps. The aquifer basics web site provides a general overview and maps of the principal aquifers of the united states by rock type and via alphabetical list. Water in the aquifer occurs in fractures, voids, and solution channels in the edwards and associated limestone. The edwards aquifer extends in a narrow belt from bell county in the northeast to kinney county in the southwest index map and provides water for at least nine counties in southcentral texas. Do you have questions about watersheds or the edwards aquifer in the city of austin. Saqram aquifer system west inventory of shared water. This groundwater availability model has been superseded by the high plains aquifer system groundwater availability model, which includes the ogallala, edwardstrinity high plains, and dockum aquifers. Hydrogeological maps a guide and a standard legend bgr.
Usgs map of the principal aquifers of the united states. An example of a significant and sustainable carbonate aquifer is the edwards aquifer in central texas. Several larval instars have been observed in collections taken throughout the year indication that the comal springs riffle beetle has overlapping, asynchro. While the edwards stretches from temple to del rio, the barton springs segment is of most interest to austinites since the water reemerges near the heart of downtown at barton springs. The edwards aquifer is an underground layer of porous limestone that stores water. A groundwater divide in hays county hydrologically separates the aquifer into the san antonio and austin regions.
All life stages, except eggs, of comal springs riffle beetle are present throughout the year. Bibliography of the edwards aquifer, texas, through 1993 pdf. According to tceq, the recharge zone is defined as the region where geologic layers of the aquifer are exposed at the surface and water infiltrates into the aquifer through cracks, fissures, caves, and. Edwards aquifer authority history edwards aquifer authority. As crucial a source of drinking water that it is, the edwards aquifer has an economic importance. Njdep njgs openfile map ofm 24, aquifers of new jersey. The edwards aquifer contributing zones polygon file was created from modeled boundaries 2003 lidar and customized boundaries based on contours, drainage.
The purpose of this map is to show an overlay of protection zones meant to ensure the quality of water in the edwards aquifer. Click here to download a pdf of the above map and table. The recharge zone is the land over the edwards aquifer that recharges the aquifer. The edwards aquifer balcones fault zone forms a narrow belt extending through nine counties, including travis county. Hydrologic boundaries divide the edwards aquifer in the austin area for which barton springs is the major discharge point. Map groundwater resources of the world transboundary aquifer. Jenness, elaine mmember lynwood sanders, member 6 fernandez, vice chairman barron, m. The edwards aquifer authority has recently enacted legislation to limit the developers ability to install impervious cover over the recharge zone environmental officials are trying to avoid the wash of pollutants from streets, cars, and new industry into the aquifer. Geological survey covers the edwards aquifer recharge zone from austin to northwest of uvalde and depicts the complicated geology of the area along with counties, cities and highways. May 07, 2018 at one time, the edwards aquifer was the only source of water that san antonio received its drinking water. But the city is growing rapidly in the vulnerable contributing and recharge zones, putting the aquifer, its unique. The saqram aquifer system west extends on the surface from northern saudi arabia into jordan. The aquifer continues to be a source of drinking water for millions of people in central texas.
Hydrogeology and groundwater flow in the edwardstrinity aquifer system, westcentral texas by eve l kuniansky and ann f. Recharge zone of the edwards aquifer hydrologically. The links below provide access to data and information regarding oklahomas groundwater resources. The edwards aquifer the edwards aquifer is a karst aquifer. Hydrogeology and groundwater flow in the edwardstrinity. Edwards aquifer protection program, november 2008 uvalde. The edwards aquifer literally is the life blood of the hill country. Diffuseflow conceptualization and simulation of the edwards aquifer, san antonio region, texas pdf.
The edwards aquifer rules are an effective mechanism we can use to protect this valuable resource. According to tceq, the recharge zone is defined as the. User guide this downloadable pdf document explains how to use the tools available in the viewer metadata the edwards aquifer maps come from official printed maps, containing regulatory boundaries based on previous geologic interpretations of the edwards aquifer zonesthat is, the recharge, transition, and contributing within the transition. However, model users interested in details about the development of the dockum aquifer groundwater availability model should still refer to the gam reports listed below. The three primary zones in the aquifer are the contributing zone, recharge zone, and the transitionartesian zone as shown in the edwards aquifer contributing zones map. Efforts by a national cooperative geologic mapping program project to compile the geology of the edwards aquifer recharge area in southcentral texas have helped to refine the hydrostratigraphy of one of the most permeable and productive carbonate aquifers in the united states. A more thorough understanding of each aquifer may be gained by referring to the suggested reports following each aquifer description. What does the edwards aquifer contributing zone mean for. Edwards is the focus of this study due to its unique physical nature as a karst aquifer resulting in highly sensitive environmental areas that provide habitat to fourteen. Whymap and the world map of transboundary aquifer systems. An aquifer is an underground layer of waterbearing permeable rock, rock fractures or unconsolidated materials gravel, sand, or silt. The full spatial extent of some aquifers and aquifer systems cannot be shown on the main map because the full.
May 6, 2020 this layer represents the boundaires of watersheds which have a contributing impact on the edwards aquifer. On the surface the edwards aquifer is comprised of three areas. Found in title 30 texas administrative code chapter 2, these rules address activities that could pose a threat to water quality in the edwards aquifer, including wells and springs fed by the aquifer and water sources to the aquifer, including. It is about 5,400 square miles, and elevations range between 1,000 and 2,300 feet above sea level. In 2006, the texas water development board twdb contracted with intera, inc. It is the solesource of drinking water for more than 1. Edwards aquifer authority science document library. Pedersen, executive administrator texas water development board william b. Section i1 special legend for aquifer and groundwater systems maps. Edwards aquifer authority groundwater users edwards.
This carbonate aquifer has historically been providing high quality water for nearly 2 million people, and even today, is full because of tremendous recharge from a number of area streams, rivers and lakes. Map pdf 5 mb textonly version this pdf 305 kb version of the report is accessible as defined in section 508 of the rehabilitation act of 1973, amendments of 1998. Learn aquifer water with free interactive flashcards. Review of the edwards aquifer habitat conservation plan. Cities like san antonio have long depended on the edwards aquifer for water, making it an integral part of the environment and geology of the region. Aquifers oftexas november1935 texas water development board craig d. This downloadable pdf document explains how to use the tools available in the viewer. Edwards aquifer, central texas geosciences libguides at. Geological survey waterresources investigations report 864036 prepared in cooperation with the city of austin austin, texas 1986. Related terms include aquitard, which is a bed of low permeability along an. From the large map you can see that most of san antonio is built over the artesian zone, allowing the city to drill its municipal wells directly down into the aquifer. Aquifer thickness ranges from 200 to 600 feet, and freshwater saturated thickness averages 560 feet in the southern part of the aquifer.
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