1, Management plan data for Llano Estacado UWCD, Management Plan Information for Hemphill County UWCD, Management plan information for Mesquite GCD, Management plan information for High Plains UWCD #1, Management plan information for Hemphil County UWCD, Proportion of aquifer with groundwater conservation districts: 86 percent, Number of counties containing the aquifer: 49. The Trinity Aquifer consists of basal Cretaceous-age Trinity Group formations extending through 61 counties from the Red River in North Texas to the Hill Country of Central Texas. This document provides information on the basic functions of AWUDS and the steps f, Fresh ground-water withdrawals from 66 principal aquifers in the United States were estimated for irrigation, public-supply, and self-supplied industrial water uses for the year 2000. The lower, more permeable part of the aquifer produces the greatest amount of groundwater. January 31, 2023. Texas Water Development Board works best with JavaScript enabled, 1700 North Congress Avenue, Austin, TX 78701TEL: 512-463-7847 / FAX: 512-475-2053, Asset Management Program for Small Systems, State Water Implementation Fund for Texas (SWIFT), Guidance & References for Online Loan Application, State Water Implementation Fund for Texas, 6th Planning Cycle Information (2026 RWPs), 2021 Regional Water Plans & Previous Plans, Regional Water Planning Data Entry Application (RWP22) Training, District Information (O-Z and Other Districts), Extended Naturalize Flow and Reservoir Evaporation, Flood Planning Useful Links and Resources, Drought Response and Financial Assistance, Water Conservation Plan ~ Utility Profile, Historical Water Loss Audit and Conservation Annual Report Data, Industrial, Commercial & Institutional (ICI), Brackish Resources Aquifer Characterization System, Notice of Nondiscrimination and Reasonable Accommodation, Texas Natural Resources Information System (TNRIS), Texas Water Infrastructure Coordination Committee (TWICC). Some of the state's largest water level declines, ranging from 350 to more than 1,000 feet, have occurred in counties along the IH-35 corridor from McLennan County to Grayson County. Guadalupe runs dry with rainfall scarce. Aquifers shown on the 2003PrincipalAquifers map, with some additions, were used as the first National AquiferReferenceList in the USGSNational Water Information System(NWIS) in theAggregate Water Use Data System(AWUDS,database released in August 2001). About 55 percent of all water used in Texas was sourced through aquifers in 2019. The areal and vertical location of major aquifers is fundamental to the determination of groundwater availability for the Nation. The groundwater information summarized in the Atlas was collected over many years by the USGS and other partner agencies,andprovides key descriptive information in a regional and national context. Such sites will not be retrieved using this search criteria. The Texas Water Development Board (TWDB) specifically disclaims any and all liability for any claims or damages that may result from providing these data. Water Tour | Aquifers Overview | Print Snapshot (PDF). Additionalhydrogeologicand groundwater recharge data is available through theRegional Groundwater Availability Studiesof theNational Water Census. A .gov website belongs to an official government organization in the United States. The information was collected by the U.S. Geological Survey and other agencies during the course of many years of study. In Texas, a minor aquifer is defined as one that supplies large quantities of water in small areas or small quantities of water in large areas. About 75 percent of this water is used for irrigation, with irrigators withdrawing most of this water from the Ogallala Aquifer alone (74 percent of all groundwater used for irrigation, or 4.5 million acre-feet per year). Water is generally hard and contains dissolved-solids concentrations ranging from less than 300 to more than 5,000 parts per million. The effects of over-pumping removing more groundwater than what is entering an aquifer pose continual challenges for aquifer managers across the state. Water Quality Available. Located west of the Franklin Mountains, the Mesilla Bolson reaches up to 2,000 feet in thickness and contains three separate water-producing zones. In scattered places in the United States, carbonate rocks are interbedded with almost equal amounts of water-yielding sandstone. We are the premier source for trusted information about Texas. Secure .gov websites use HTTPS Edwards (Balcones Fault Zone) (San Antonio-oriented) It is composed of several smaller aquifers contained within the Trinity Group. The Ogallala Aquifer is the largest aquifer in the United States and is a major aquifer of Texas underlying much of the High Plains region. Center the map where you want the center of your print, enter a title in the textbox and choose a page size for your print using the drop down. The competition for ground water from the Edwards aquifer has created some controversial water issues in central Texas. The Texas Water Development Board (TWDB) has identified and characterized nine major and 20 minor aquifers in the state based on the quantity of water supplied by each. Texas Gulf Coast Groundwater and Land Subsidence Over Forty Years of Research in the Houston-Galveston Region. Near the plateaus edge, flow is toward the main streams, where the water issues from springs. Extending from the Rio Grande in South Texas northeastward into Arkansas and Louisiana, the Carrizo-Wilcox aquifer provides water to all or parts of 66 counties. (in error) Northern Great Plains aquifer system, Some revisions to the lists of valid States, this code, and reference list were added to the NWIS Site File and toNWISWebwith the release of NWIS 4.5 in 2005; see the WMA Technical Memo "NWIS 4.5 -- Assigning National Aquifer Codes in the Ground Water Site Inventory (GWSI) for the NWIS 4.5 Release.". Additional aquifer data through the USGS web app Water level increases were found in the northern portion of the study area, near the Yoakum and Terry County boundary and in northeastern Gaines County. Nearly 100 groundwater conservation districts work across the state to preserve Texas aquifers and their groundwater levels. To learn more, visit theNational Aquifer Code Reference List. This is an important step in planning for water in Texas and Bastrop County for the next 50 years. It's very responsive to the weather and very responsive to drought, unfortunately. About 55 percent of all water used in Texas was sourced through aquifers in 2019. Would you like to submit an article, provide feedback, or just get in touch? Although the Carrizo-Wilcox Aquifer reaches 3,000 feet in thickness, the freshwater saturated thickness of the sands averages 670 feet. Water from the Antlers portion is used mainly for irrigation in the outcrop area of North and Central Texas. Water quality is generally good northeast of the San Antonio River basin, but deteriorates to the southwest. For the distance tool click points on the map to build line segments to measure and double click to complete the measurement. Texas Water Development Board works best with JavaScript enabled. Natural salt pollution in the upper reaches of the Red and Brazos river basins precludes the full utilization of these water resources. ; Metadata - The Edwards Aquifer maps were developed from official printed maps that contain regulatory boundaries based on geologic interpretations of the Edwards Aquifer zonesthat is, the recharge, transition, and contributing within the transition zones, as . In 2019, more than 4.4 million acre-feet were pumped from the Ogallala Aquifer, accounting for 67 percent of the water sourced from all major Texas aquifers. The pages below contain descriptionsand maps of these main aquifer types: These pages, formerly hosted at ourAquifer Basicswebsite,provide ageneral summary of information published in the Ground Water Atlas of the United States. Extensive development of the Trinity Aquifer in the Dallas-Fort Worth and Waco areas has resulted in water-level declines of 350 to more than 1,000 feet. The recharge zone of the aquifer in Burnet County is approximately 18,011 acres. It is absent in a broad area extending from the north central portion of the county continuing to the south, southwest part of Gillespie County. In Harris, Galveston, Fort Bend, Jasper, and Wharton counties, water level declines of as much as 350 feet have led to land subsidence. 500--Sandstone and carbonate-rock aquifers. Water quality in the Carrizo-Wilcox Aquifer shows isolated areas of slightly saline to moderately saline groundwater in the eastern and central portions of the aquifer and more widespread areas of slightly to moderately saline groundwater in the southwest. This system has been divided into three major water-producing components referred to as the Chicot, Evangeline, and Jasper aquifers. Last fall while exploring for oil and gas deposits in southwest Texas, a driller instead found a huge freshwater deep aquifer. geline aquifers near Houston, Texas. The name of N600NECRSN was changedfrom "New England crystalline-rock aquifers" to "New York and New England crystalline-rock aquifers" to better reflect the geographic extent (January 2015). These aquifers consist of limestones, sands, clays, gravels, and conglomerates. There are 13 major and 20 minor aquifers; in the Hill Country, the major aquifers are the Edwards and the three water-producing zones of the Trinity. Water to the north of the Canadian River is generally fresh, with total dissolved solids typically less than 400 milligrams per liter. A national layer, including all available SSA coverages, is available for use in GIS. Municpal water use in 2008 accounted for 87 percent of total use from the Hueco-Mesilla Bolson. Below are publications associated with principal aquifers. This dataset documents the depth to groundwater measured in wells screened in the Chicot, Evangeline, and Jasper aquifers in the Houston-Galveston region, Texas for 2019. They are grouped into four categories: basin-fill, blanket sand and gravel, glacial-deposit, and stream-valley aquifers. Aquifers are shown in the States of Maine, Vermont, New Hampshire, Connecticut, Massachusetts, Rhode Island, New Jersey, New York, Pennsylvania, Ohio, Indiana, Michigan, Wisconsin, Illinois, Minnesota, Iowa, Missouri, Kansas, Nebraska, South Dakota, North Dakota, and Montana. Igneous and metamorphic-rock aquifers can be grouped into two categories: crystalline-rock and volcanic-rock. Texas has three ASR systems. The Hickory aquifer occurs in parts of 19 counties in the Llano Uplift region of Central Texas. The availability of this water is critical to the economy of the region, as approximately 95 percent of groundwater pumped is used for irrigated agriculture. Adopt the TX Town or County of your choice and share your message with the world. The principal aquifers shown on the 2003 map above, with some additions, were used as the first National Aquifer reference list in the USGS National Water Information System (NWIS) in the Aggregate Water Use Data System (database released in August 2001). El Paso and Fort Bliss also have built the worlds largest inland desalination plant in El Paso County, which uses brackish groundwater from the Hueco Bolson. The principal aquifer in Uvalde County is the Edwards and associated limestones of Cretaceous age. A two-dimensionalmap representation of the principal aquiferswas derived from this data and published as part of the National Atlas in 1998 (revised 2003). The aquifer is used for municipal, industrial, and irrigation purposes. Water quality generally ranges from fresh to slightly saline. The Ogallala Aquifer provides significantly more water for users than any other aquifer in the state. Aquifer Code Name. The aquifer system is composed of the Catahoula, Oakville, Fleming, Goliad, Willis, Lissie, Bentley, Montgomery, and Beaumont formations. U.S. Geological Survey 505 Ferguson Lane Austin, Texas 78754-4501 The Edwards and Trinity aquifers are classified as major aquifers by the Texas Water Development Board and are major sources of water in south-central Texas, where Hays County is located. For Geophysical Well Log assistance contact. Geology, Major and Minor Aquifers, BRACS Study Areas, Regional Water Planning Areas, Groundwater Management Areas, Groundwater Conservation Districts, River Basins, Counties, 7.5' United State Geological Survey Grid, 2.5' State Grid, Latitude, Longitude, and Land Elevation. Aquifers in carbonate rocks are most extensive in the eastern U.S. Their combined freshwater saturated thickness averages about 600 feet in North Texas and about 1,900 feet in Central Texas. Texas Water Development Board works best with JavaScript enabled. Computer models of the northern and southern portions of the Ogallala aquifer were completed by the Texas Water Development Board and its contractor. The aquifer also feeds several well-known recreational springs and underlies some of Texas most environmentally sensitive areas. The Carrizo-Wilcox Aquifer is a major aquifer extending from the Louisiana border to the border of Mexico in a wide band adjacent to and northwest of the Gulf Coast Aquifer. Page Contact Information: Texas Water Data Maintainer Page Last Modified: 2023-02-25 01:14:50 EST Nearly 80 percent of the groundwater produced in 2008 was used for irrigating crops, especially in the Panhandle region. AWUDS has a graphical user interface that facilitates data entry, revision, review, and approval. An official website of the United States government. A .gov website belongs to an official government organization in the United States. Five GCD's (Red on the map), the GMA12, are required to work together to set these conditions for the Carrizo-Wilcox Aquifer. The aquifer maps and reports undergo continual revision to reflect the latest information available. Years of heavy pumpage have caused significant water-level declines in portions of the aquifer. About 60 percent of the approximately 16 million acre-feet of water used yearly in Texas is derived from underground formations that make up 9 major and 22 minor aquifers (for map of minor aquifers, click). In general, groundwater is fresh but very hard in the outcrop of the aquifer. Hydrogeologic unit boundaries (framework) and groundwater recharge data. Freshwater saturated thickness averages 95 feet. Surficial deposits which are not of glacial origin may be coded as Alluvial aquifers. H2Oaks is Aquifers play a major role in providing water to many parts of Texas. Secure .gov websites use HTTPS However, because these aquifers extend over large areas, large volumes of water can be withdrawn. The Trinity Aquifer consists of basal Cretaceous-age Trinity Group formations extending through 61 counties from the Red River in North Texas to the Hill Country of Central Texas. The Texas Water Development Board (TWDB) recognizes 9 major aquifers aquifers that produce large amounts of water over large areas (see major aquifers map) and 22 minor aquifers aquifers that produce minor amounts of water over large areas or large amounts of water over small areas (see minor aquifers map ). PrefaceThe Ground Water Atlas of the United States presents a comprehensive summary of the Nation's ground-water resources and is a basic reference for the location, geography, geology, and hydrologic characteristics of the major aquifers in the Nation. The Wilcox Group and overlying Carrizo Sand form a hydrologically connected system of sand locally interbedded with clay, silt, lignite, and gravel. Irrigation pumping accounts for slightly more than half the water pumped, and pumping for municipal supply accounts for another 40 percent. . Groundwater movement in sandstone aquifers primarily is along bedding planes, but joints and fractures provide avenues for the vertical movement of water. In general, groundwater is fresh but very hard in the outcrop of the aquifer. Most of the carbonate-rock aquifers consist of limestone, but dolomite and marble locally yield water. Groundwater encountered within this area is normally under unconfined, water-table conditions and is most susceptible to contamination. Elsewhere, the aquifer supplies fresh but hard water for municipal, domestic, and livestock use. In 2008, about 72 percent of pumpage from the aquifer was for municipal use. This area corresponds to the principal recharge zone for the aquifers. Some of these declines have resulted in significant land-surface subsidence, particularly in the Houston-Galveston area. The desired future conditions provide the foundation for estimating the amount of groundwater available to the region. You may need to request the addition of Alluvial aquifers to the list of aquifers valid in your State. 400--Carbonate-rock aquifers. Purchase your copy of the brand new Texas Almanac today! Get your free copy of the 20202021 Texas Almanac eBook. Alluvial aquifers--consist of stream-valley aquifers and other aquifers of unconsolidated alluvial materials, not included in another named national aquifer, south of the limit ofQuarternarycontinental glaciation and east of the Rocky Mountains. Located in the upper Pecos River Valley of West Texas, this aquifer, formerly called the Cenozoic Pecos Alluvium, extends through 12 counties. Browse our curated list of helpful links for students and researchers. General Information Letters and Private Letter Rulings, State Tax Automated Research (STAR) System, Historically Underutilized Business (HUB), Vendor Performance Tracking System (VPTS), Texas Procurement and Contract Management Guide, Minnie Stevens Piper Foundation College Compendium. Throughout much of the aquifer, groundwater withdrawals exceed the amount of recharge, and water levels have declined fairly consistently through time. Declines continue in Ward County due to increased municipal and industrial pumping. For the area tool click points on the map to begin building the polygon you want to measure and then double click to close the polygon. About 32 percent of water used to meet municipal demands is from groundwater. However, the salinity has increased in many heavily pumped areas to the point where the water has become unsuitable for domestic and municipal use. Select the area, distance or location tool below. Water in the aquifer occurs in fractures, honeycomb zones (or intergranular pores), and solution channels in the Edwards and associated limestone formations of Cretaceous age. Consisting of up to 1,500 feet of alluvial fill, the aquifer occupies two hydrologically separate basins: the Pecos Trough in the west and the Monument Draw Trough in the east. Groundwater also supplies about 35 percent of the municipal needs of the state. Sulfate and chloride concentrations also tend to increase with depth. Aquifers are identified by a geohydrologic unit code (a three-digit number related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name). The aquifer consists of sand, gravel, clay, and silt and has a maximum thickness of 800 feet. Although water level declines in excess of 300 feet have occurred in several areas over the last 50 to 60 years, the rate of decline has slowed, and water levels have risen in a few areas. It is part of the U.S. Geological Survey National Water Information System. In the south, the Trinity includes the Glen Rose and underlying Travis Peak formations. Where the Glen Rose thins or is absent, the Twin Mountains and Paluxy formations coalesce to form the Antlers Formation. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations. New and Environmentally Improved. In 2008, irrigation accounted for 43 percent of water pumped from the aquifer, and municipal supply accounted for 47 percent. (Note that the National Aquifer Code uses a different numeric component than the geohydrologic unit names.). Each PA was sampled across its lateral extent using an equal-area grid, typically with 60 wells. The aquifer is one of the most extensive and highly used groundwater resources in Texas. 300--Sandstone aquifers. 1700 North Congress Avenue, Austin, TX 78701 TEL: 512-463-7847 / FAX: 512-475-2053. Click any position on the map to reveal attributes for a specific location. Texas Water Development Board. Groundwater also supplies about 35 percent of the states municipal needs. Official websites use .gov This list of national principal aquifer codes and names are fixed values assigned by the National Water Information System(NWIS). (March 2005). Revisions to the reference list since it was first used by NWIS: Northern Great Plains aquifer system was removed:this umbrella term includes four national aquifers but is not considered a national aquifer itself. Well, in Central Texas, and particularly the Edwards Aquifer, it's an aquifer that has a lot of caves in it and fractures. The aquifer is comprised of the Twin Mountains, Glen Rose, Paluxy, Hosston, and Hensell formations.
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