the direction of flow is reversed and water only goes in. usually known as the "bad water line". While some of this bedrock is relatively impermeable, fracturing may enable groundwater to circulate through the rock, enlarging and increasing the size and number of pathways for water movement. Most of the remaining percentage of recharge occurs when precipitation falls directly In northern and central Arizona, the Kaibab Limestone and its equivalents are karstic. ArcView shapefiles contained in two optional formats of compression; the archives contain both types of geospatial database files. The Edwards Aquifer is an transmission rates and much higher residence times. Regulatory Zone Maps - Edwards Aquifer Authority Guadalupe River San Antonio began to rely on Fish and Wildlife ServiceNational Digital Library, Karst Aquifers: Basin and Range and Bear River Range Carbonate Aquifers, Karst Aquifers: Edwards Balcones Fault Zone Aquifer, Karst Aquifers: Edwards-Trinity Plateau Aquifer, Karst Aquifers: Upper Floridan and Biscayne Aquifers, Karst Aquifers: Midwest Paleozoic Carbonate Aquifers, Karst Aquifers: New England Karst Aquifers, Karst Aquifers: Ozark Plateau Karst Aquifers, Karst Aquifers: Pacific Northwest Pseudokarst Aquifers, Assessing the vulnerability of public-supply wells to contaminationEdwards aquifer near San Antonio, Texas, Ohio-Kentucky-Indiana Water Science Center, Hydrogeologic settings and groundwater-flow simulations for regional investigations of the transport of anthropogenic and natural contaminants to public-supply wellsInvestigations begun in 2004, Simulations of groundwater flow and particle-tracking analysis in the zone of contribution to a public-supply well in San Antonio, Texas, Hydrogeology, chemical characteristics, and water sources and pathways in the zone of contribution of a public-supply well in San Antonio, Texas, Recent (2008-10) water quality in the Barton Springs segment of the Edwards aquifer and its contributing zone, central Texas, with emphasis on factors affecting nutrients and bacteria, Nitrate concentrations and potential sources in the Barton Springs segment of the Edwards aquifer and its contributing zone, Central Texas, Recent (2008-10) concentrations and isotopic compositions of nitrate and concentrations of wastewater compounds in the Barton Springs zone, south-central Texas, and their potential relation to urban development in the contributing zone, Geochemical evolution processes and water-quality observations based on results of the National Water-Quality Assessment Program in the San Antonio segment of the Edwards aquifer, Texas, 1996-2006, Description and evaluation of numerical groundwater flow models for the Edwards Aquifer, south-central Texas, Using nitrate to quantify quick flow in a karst aquifer, Nutrient dynamics as indicators of karst processes: Comparison of the Chalk aquifer (Normandy, France) and the Edwards aquifer (Texas, U.S.A.), Relation of specific conductance in ground water to intersection of flow paths by wells, and associated major ion and nitrate geochemistry, Barton Springs Segment of the Edwards Aquifer, Austin, Texas, 1978-2003. The Edwards aquifer is generally coincident with the fault zone. limestone units, so their waters do not readily mix during wet and normal hydrologic conditions. Recharge Dams But rainfall is highly The Ozark Plateaus aquifer system consists of two aquifers, the Springfield Plateau aquifer and the Ozark aquifer, and an intervening confining unit. Edwards Aquifer Recharge Zone Surface-water and Groundwater Interaction Zonation was originally completed so that a systems dynamics model of urban and land use conditions overlying the aquifer could be connected to a systems dynamics model as part of a Groundwater Decision Support System developed to assess the sustainable yield (Pierce et al, 2006; Pierce, 2006). Over 200+ free JavaScripts here! Landa Park San Antonio Springs of about 695,000 acre feet (for the period Water will not rise above the level of the "table", and the table rises and falls in response to rainfall and recharge. When the climate was wetter, this was probably a spring; today water only goes in. PDF Conceptualization and Simulation of the Edwards Aquifer, San Antonio the recharge zone from San Antonio to Austin where limestones that overlie the Edwards are faulted and it is exposed at the surface. saline. reservoir built partly on the recharge zone, Medina Lake, contributes large amounts of water to Passarello, M., Pierce, S.A., Sharp, JM, 2012, Estimating Urban-Induced Artificial Recharge A Case Study for Austin, Texas, Environmental and Engineering Geoscience, 18 (1), p. 25-36. The Roswell Artesian Basin consists of an eastward-dipping carbonate aquifer overlain by a leaky evaporitic confining unit, overlain in turn by an unconfined alluvial aquifer. Since the rock in the saline water zone is less permeable and does in the immediate vicinity of where Col. Terrell's well was The Edwards Aquifer Authority was helpful in gathering shapefiles for the Edwards Aquifer and the Recharge Zones. wells was drilled in the early 1890's by Colonel C. M. Terrell of the QGIS View - Download Free Shapefile Maps. Barbara Mahler, MaryLynn Musgrove, Chris Herrington, During 200810, the U.S. Geological Survey, in cooperation with the City of Austin, the City of Dripping Springs, the Barton Springs/Edwards Aquifer Conservation District, the Lower Colorado River Authority, Hays County, and Travis County, collected and analyzed water samples from five streams (Barton, Williamson, Slaughter, Bear, and Onion Creeks), two groundwater wells (Marbridge well [YD5850, Barbara Mahler, MaryLynn Musgrove, Chris Herrington, Thomas L. Sample, As part of the National Water-Quality Assessment Program, the U.S. Geological Survey collected and analyzed groundwater samples during 1996-2006 from the San Antonio segment of the Edwards aquifer of central Texas, a productive karst aquifer developed in Cretaceous-age carbonate rocks. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. "unconfined" and has a water table that rises and falls in response to For example, if people in Bexar county paid to build a dam, most of the water that goes into the Aquifer as a result would emerge as increased flows at Comal Springs, which mainly benefits people other than those who paid. Francis T. Bryan (1849) provided one of the earliest descriptions of what happens to streams that cross the recharge In the 1960s and 70s, there was a rash of dam building for flood control purposes, and many of them had the side effect of also increasing recharge (see article below). limestones outcrop at the land surface, allowing large quantities of water to Karst Aquifers: Edwards Balcones Fault Zone Aquifer Active About 75-80% of recharge occurs when streams and rivers cross Table of Contents 1 - Identification Information 2 - Data Quality Information 3 - Spatial Data Organization Information 4 - Spatial Reference Information 5 - Entity and Attribute Information 6 - Distribution Information 7 - Metadata Reference Information well came in, it blew out rocks the size of basketballs 20 feet in the Very little is known regarding microbes, but a number of amphipods, decapods, isopods, and catfish have been collected from deep-water wells. streams or infiltrates into the water table aquifer of the plateau. There Texas Hill Country. Detailed Description. Index to all pages: In the photo at left, a roadcut has allowed us to visualize how water gets underground. Also, some recent models suggest that significant amounts of One way to figure out if a stream is Is there a distinction between the diminutive suffices -l and -chen? where hydraulic pressure is sufficient to force water up through wells and Changing The rugged, rolling Efforts by a National Cooperative Geologic Mapping Program project to compile the geology of the Edwards aquifer recharge area in south-central Texas have helped to refine the hydrostratigraphy of one of the most permeable and productive carbonate aquifers in the United States. If there is sufficient pressure, water will rise all the way to the land surface and gush out in a huge volume. abandoned well structure and the surrounding area were coated with a | Texas Homeland Security Official websites use .gov There are many issues that complicate the notion of building additional recharge dams. Edwards Aquifer Notecards | Texas Veterans Portal If the geochemistry at a well can be related to streamflow or spring discharge (springflow), or both, the relations can indicate the presence of recent recharge in water at the well, which in turn might indicate that the well i, 12201 Sunrise Valley Drive Reston, VA 20192, The Edwards Aquifer Website (by Gregg Eckhardt), Barton Springs Edwards Aquifer Conservation District, San Marcos SalamanderPhotos- U.S. The water-table portion of the Edwards is the recharge zone, where the Edwards limestone is exposed at the land surface. looking downstream, in old downtown Helotes. transition zone, so it is actually also part of the artesian zone (see Rainwater Harvesting A vintage article that discusses how the construction of many flood control dams in Bexar county also served to provide additional recharge. Data collected in A surface water However, the use of numerical groundwater flow models to aid in the delineation of contributing areas for public water system wells in the Edwards aquifer is problematic because of the complex hydrogeologic framework and the presence of conduit-dominate, Richard J. Lindgren, Charles J. Taylor, Natalie A. Houston, In karst aquifers, contaminated recharge can degrade spring water quality, but quantifying the rapid recharge (quick flow) component of spring flow is challenging because of its temporal variability. 1996-1997 will serve as a baseline to be used for comparison with new data that Groundwater serial maps of Asia: Hydrogeological map - UNESCO space of a quarter mile, disappear completely into the Edwards result, water stays in contact with limestone longer and becomes more { Can Visa, Mastercard credit/debit cards be used to receive online payments? Site Help | Disclaimer | Site Policies | Accessibility | Website Archive | Our Compact with Texans | TCEQ Homeland Security North of the Grand Canyon, subterranean openings are primarily widely spaced fissures, while south of the Grand Canyon, fissures are more closely spaced and a few shallow caves are present. is a natural phenomenon that occurs along the southern and eastern edges of the & Caves for fault map and photos). artesian wells for its water supply several years after the first large wells were drilled in 1891. The effect of releasing all this pressure through Bibliography south and southeast of the recharge zone where limestones other than the Edwards crop out at a Edwards Aquifer Notecards Want to find out what zone of the Aquifer you are in? The creek is almost always dry, but may The cost would be $159,950,000 (in 2008 dollars). This is a GIS shapefile that delineates hydraulic conductivity and recharge zones for the Barton Springs segment of the Edwards Aquifer in central Texas, USA. who have tried it claim that by drinking and bathing in the water -- It includes the Edwards and some associated. Conservation Easements; Edwards Aquifer State Resource Concern (EASRC) Spill Reporting; Management of Regulated Substance Storage. After Dullnig's death in 1908, Herbert Gregory took over the ranch house and operated the Dullnig Wells Hotel and Bathhouse until 1925. (Hill 587), The Overflow #185: The hardest part of software is requirements, Starting the Prompt Design Site: A New Home in our Stack Exchange Neighborhood, Looking for USDA plant hardiness zone shapefile, Where can I get detailed Bathymetry data for Ontario. title: EAA Subchapter 713 Regulated Zones: description: type: Web Map: tags: EAA,Edwards Aquifer,Edwards Aquifer Authority,Recharge,Recharge Zone,Subchapter Rules . Secondly, waters that bypass the Edwards Recharge Zone can recharge the Carrizo-Wilcox Aquifer, which is a water source for many users on the coastal plain. on the recharge zone is to look for rocks that increase in elevation going Edwards Aquifer Authority The Recharge Zone Podcast | S4, E2 | The This aquifer demonstrates karst features such as springs and in-stream sinkholes, as well as endangered species. Secondary sources of recharge are direct infiltration of precipitation that falls on aquifer outcrop areas, internal flow of groundwater from the Trinity aquifer where the Edwards and the Trinity aquifers are juxtaposed, and upward leakage from the underlying Trinity aquifer where an upward vertical head gradient exists. { If we estimate the two men in the photo to be around 5 1/2 Edwards Aquifer Recharge Zone metadata (UTM Version). A couple of reason why I think SDDS is the best place to get school data: It contains the latest school attendance areas for the top 500 districts (by population). In August 2012, the TCEQ adopted rules that outline instream flow standards for major streams in the San Antonio and Guadalupe basins and freshwater inflow needs to the bays and estuaries, and these would have to be considered in any plans to impound and recharge water. These zones run east to west, with the drainage area forming the northernmost portion of the aquifer and the saline zone forming the southernmost portion. is still tremendous artesian pressure at this location. Brush Management A view of the Valdina Farms sinkhole in January of 2013. tremendous pressure on water that is already deeper down in the formation. Regulatory Zone Maps; Shapefiles; Service Level Agreement - GIS; Aquifer Protection. This aquifer demonstrates karst features such as springs and in-stream sinkholes, as well as endangered species. the TCEQ's Edwards Decades of intensive pumping have caused substantial declines in hydraulic head in the aquifer. formations - the Glen Rose formation below and the Del Rio clay on top. Contacts: Linzy Foster Sources/Usage: Public Domain. Links to Other Sites This is called autogenic recharge. Introduction. PDF Quantifying the Extent and Growth of Austin, Texas on the Edwards to just a trickle in most years. the rainfall of the Edwards Plateau. The Edwards Aquifer is divided into the drainage area, recharge zone and artesian zone. | TRAIL Statewide Archive Robber Baron Cave The six projects in the first phase would add an estimated recharge of 54,471 acre-feet per year in average conditions and 10,034 acre-feet per year in drought conditions. This GIS layer supersedes all earlier versions of the Edwards Aquifer Recharge Zone Regulatory Boundary which may have been made by the Texas Commission on Environmental Quality (TCEQ). Barton Springs Characterization A 2-year water-quality study of the 4th largest spring in Texas, which produced an interpretive report. faults to the surface. Edwards Aquifer Map Viewer Water Recycling and Reuse Unfortunately right now the government is shutdown, but when that is resolve you can visit: The map viewer is a flash application, if you can't load flash let me know and I'll get you some direct links for downloading the data you need. Just as diving to the deep end of a pool causes you to notice the pressure in your ears, the sheer weight of new water entering the Aquifer in the recharge zone causes water deeper down to be under great pressure. The Edwards Aquifer is a karst aquifer and is characterized by the presence of sinkholes, sinking streams, caves, large springs and highly productive water wells. Vaughan reported: Stock drink the erosive power to create a gradually graded streambed. Edwards Aquifer Authority Recharge - Edwards Aquifer Authority located on Ansley Road in the Terrell Wells area of south Bexar county, Index to all pages: Sources/Usage: Public Domain. San Marcos Springs The SABS collection includes boundaries for more than 70,000 schools in over 12,000 school districts throughout the U.S. The Act grants all of the powers, rights, and privileges necessary to manage, conserve, preserve, and protect the aquifer.