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Encyclopedia > Edwards Aquifer

The Edwards Aquifer is one of the most prolific artesian aquifers in the world. Located on the eastern edge of Edwards Plateau in the U.S. state of Texas, it discharges about 900,000 acre feet of water a year and directly serves about two million people.[1] The Edwards Aquifer is also home to several unique and endangered species. Geological strata giving rise to an Artesian well. ... An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, silt, or clay) from which groundwater can be usefully extracted using a water well. ... The Edwards Plateau is a region of west-central Texas which is bounded by the Balcones Fault to the south and east, the Llano Uplift and the plains region to the north, and the Pecos River to the west. ... Federal courts Supreme Court Chief Justice Associate Justices Elections Presidential elections Midterm elections Political Parties Democratic Republican Third parties State & Local government Governors Legislatures State Courts Counties, Cities, and Towns Other countries Politics Portal      A state of the United States is any one of the fifty subnational entities of the... Official language(s) English (de facto) See also languages of Texas Capital Austin Largest city Houston Area  Ranked 2nd  - Total 268,581 sq mi (695,622 km²)  - Width 773 miles (1,244 km)  - Length 790 miles (1,270 km)  - % water 2. ... An acre foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, and river flows. ...

Contents

Geography

The aquifer's recharge zone, where surface water enters the aquifer, follows the Balcones Fault line, from Brackettville (roughly along Highway 90), through San Antonio, and north to Austin (roughly along Interstate 35). Its contributing zone, where shed water is transported near the surface to the recharge zone, extends about 40 miles (64 kilometers) north of the recharge zone at the west end, and tapers to end at a point in the east. The artesian zone, where water springs from wells naturally due to the higher elevation of the recharge zone, extends 10–20 miles (16–32 kilometers) south on the west end to only a few miles south on the east end. Across the eastern half of the aquifer, the recharge and artesian zones occupy common area. The Balcones Fault is a zone of normal faulting in Texas (USA) that runs approximately from the southwest part of the state to the north central region. ... Brackettville is a city in Kinney County, Texas, United States. ... Nickname: Alamo City; River City Location in the state of Texas Coordinates: Counties Bexar County  - Mayor Phil Hardberger Area    - City  412. ... Nickname: Live Music Capital of the World Location in the state of Texas Coordinates: Country United States State Texas County Travis County  - Mayor Will Wynn Area    - City 669. ... This Interstate Highway article needs to be cleaned up to conform to both a higher standard of article quality and accepted design standards outlined in the WikiProject U.S. Interstate Highways. ...

 hi im riley. :] 

Economy

The plentiful water provided by rivers fed from the Edwards Aquifer is the primary reason Spanish missionaries were able to establish so many missions, like the Alamo Mission in San Antonio. Later, immigrants found the Texas Hill Country welcoming because of the food, energy, and water provided by these rivers. Without this supply in the arid plateau, early colonization would have been far more difficult. Cities like San Antonio, New Braunfels, and San Marcos have been able to support large populations without the need to develop surface water resources. Farmers and ranchers south of the aquifer benefit greatly or entirely from the irrigation possible from these rivers. A missionary is a propagator of religion, often an evangelist or other representative of a religious community who works among those outside of that community. ... The Alamo (formally: San Antonio de Valero Mission) is the name (from the Spanish word álamo, meaning cottonwood trees) of former mission and fortress compound, now a museum, in San Antonio, Texas, United States. ... The Texas Hill Country, as seen from near Interstate 10. ... An arid environment has a high precipitation deficit, receiving much less precipitation annually than would satisfy the climatological demand for evaporation and transpiration. ... Motto: friendship Location Government County Comal County Founded 1845 Mayor Bruce Boyer Geographical characteristics Area    - City 76. ... Image:Marcos. ... High-altitude aerial view of irrigation in the Heart of the Sahara ( ) Irrigation is the replacement or supplementation of rainfall with water from another source in order to grow crops or plants. ...


Ecology

The Edwards Aquifer is home to several unique species, like the Texas Blind Salamander, Helotes mold beetle, the Robber Baron Cave harvestman, and the Robber Baron Cave spider. These species actually live in the caves, and are either completely without eyes or their eyes are so underdeveloped that they are essentially eyeless. The springs fed from the aquifer are also home to many unique species, such as the Fountain Darter, San Marcos Gambusia (which might already be extinct), and the San Marcos salamander. Texas Wild Rice is also found only in the upper San Marcos River. Binomial name Eurycea rathbuni Stejneger, 1896 The Texas Blind Salamander, Eurycea rathbuni, is a rare cave dwelling salamander native to San Marcos, Hays County, Texas, specifically the San Marcos Pool of the Edwards Aquifer. ... Binomial name Etheostoma fonticola Jordan & Gilbert, 1886 The fountain darter (Etheostoma fonticola) is a small freshwater fish found in the headwaters of only two rivers in Texas: the Comal River and the San Marcos River. ... The (Gambusia georgei) was endemic to the San Marcos River, Hays County, Texas and was last collected in the wild in 1983. ... Binomial name Eurycea nana Bishop, 1941 The San Marcos Salamander (Eurycea nana) is a small species of aquatic, lungless salamander native to the United States. ... Species Zizania aquatica Zizania latifolia Zizania palustris Zizania texana The four species of wild rice compose the genus Zizania (common names: Canada rice, Indian rice, and water oats), a group of grasses that grow in shallow water in small lakes and slow-flowing streams. ... The San Marcos River rises from Aquarena Springs in San Marcos, Texas. ...


See also

The Edwards Plateau is a region of west-central Texas which is bounded by the Balcones Fault to the south and east, the Llano Uplift and the plains region to the north, and the Pecos River to the west. ... The Balcones Fault is a zone of normal faulting in Texas (USA) that runs approximately from the southwest part of the state to the north central region. ... The San Marcos River rises from Aquarena Springs in San Marcos, Texas. ... The Comal River is the shortest river in Texas, running entirely within the city limits of New Braunfels in southeast Comal County. ... The Guadalupe River near Hunt in the Texas Hill Country The Guadalupe River runs from Kerr County, Texas, to the San Antonio River near the Gulf of Mexico. ... Central Texas (a part of which is Texas Hill Country), is a region in the U.S. state of Texas. ... The Texas Hill Country, as seen from near Interstate 10. ...

External links

State of Texas
Austin (capital)
Topics

History ǀ Republic of Texas ǀ Geography ǀ Government ǀ Politics ǀ Economy ǀ Texans Image File history File links Flag_of_Texas. ... Federal courts Supreme Court Chief Justice Associate Justices Elections Presidential elections Midterm elections Political Parties Democratic Republican Third parties State & Local government Governors Legislatures State Courts Counties, Cities, and Towns Other countries Politics Portal      A state of the United States is any one of the fifty subnational entities of the... Official language(s) English (de facto) See also languages of Texas Capital Austin Largest city Houston Area  Ranked 2nd  - Total 268,581 sq mi (695,622 km²)  - Width 773 miles (1,244 km)  - Length 790 miles (1,270 km)  - % water 2. ... Nickname: Live Music Capital of the World Location in the state of Texas Coordinates: Country United States State Texas County Travis County  - Mayor Will Wynn Area    - City 669. ... Independence Hall in Philadelphia, Pennsylvania, site of first U.S. capital. ... This is a list of articles that have something substantive to do with the state of Texas. ... The history of Texas (as part of the unitited states) began in 1845, but settlement of the region dates back to the end of the Upper Paleolithic Period, around 10,000 BCE. Its history has been shaped by being part of six independent countries: Spain, France, Mexico, the Republic of... Capital Washington-on-the-Brazos, Harrisburg, Galveston, Velasco, Columbia (1836) Houston (1837–1839) Austin (1839–1845) Language(s) English (de facto) Spanish, French, German and Native American languages regionally Government Republic President1  - 1836-1838 Sam Houston  - 1838-1841 Mirabeau B. Lamar  - 1841-1844 Sam Houston  - 1844-1845 Anson Jones Vice... For approximately 100 years, from the end of Reconstruction until the 1970s, the Democratic Party was dominant in Texas Politics. ... The following are people who were either born/raised or have lived for a significant period of time in Texas. ...

Regions

Ark‑La‑Tex ǀ Big Bend ǀ Brazos Valley ǀ Central Texas ǀ Dallas/Fort Worth Metroplex ǀ Deep East Texas ǀ East Texas ǀ Edwards Plateau ǀ Galveston Bay ǀ Golden Triangle ǀ Greater Houston ǀ Llano Estacado ǀ North Texas ǀ Northeast Texas ǀ Permian Basin ǀ Piney Woods ǀ Rio Grande Valley ǀ South Texas ǀ South Plains ǀ Southeast Texas ǀ Texas Hill Country ǀ Texas Panhandle ǀ West Texas This list of regions of the United States includes official (governmental) and non-official areas within the borders of the United States, not including U.S. states, the federal district of Washington, D.C. or standard subentities such as cities or counties. ... The general area of the Ark-La-Tex highlighted within the United States. ... Casa Grande is a prominent peak in the Chisos Mountains of the Big Bend area of west Texas. ... The Brazos Valley is a region in Texas consisting of Brazos County, Robertson County, Grimes County, Washington County, Madison County, and Leon County, with Brazos County and the cities of College Station and Bryan at its center. ... Central Texas (a part of which is Texas Hill Country), is a region in the U.S. state of Texas. ... The Dallas/Fort Worth Metroplex encompasses the metropolitan divisions of Dallas–Plano–Irving and Fort Worth–Arlington, within the U.S. state of Texas. ... Deep East Texas is a subregion of East Texas in the US state of Texas. ... Red counties show the core of East Texas; pink and red counties may or may not be included in East Texas, and thus their inclusion varies from source to source. ... The Edwards Plateau is a region of west-central Texas which is bounded by the Balcones Fault to the south and east, the Llano Uplift and the plains region to the north, and the Pecos River to the west. ... Galveston Bay is a large estuary located along Texass coastline. ... The Beaumont–Port Arthur metropolitan area is defined by the United States Census Bureau as a three-county region in Southeast Texas, east of the Houston–Sugar Land–Baytown metropolitan area. ... The Houston–Sugar Land–Baytown metropolitan area, a title designated by the U.S. Census as of 2003, is the seventh-largest metropolitan area and one of the most diverse[2] in the United States consisting of 10 counties within the state of Texas. ... Shaded Relief Image of the Llano Estacado Llano Estacado (or Staked Plains) is a region in the southwestern United States that encompasses parts of eastern New Mexico and northwestern Texas. ... North Texas is a distinct cultural and geographic area forming the central-northeastern section of the US state of Texas. ... Northeast Texas is a region in the northeast corner of the U.S. state of Texas. ... The Permian Basin is a basin in the western part of the U.S. state of Texas, from just south of Lubbock to just south of Midland & Odessa, and it extends Westward into the Southeastern part of New Mexico. ... The Piney Woods viewed from Loop 390 outside of Marshall, Texas The Piney Woods is a terrestrial ecoregion in the Southern United States covering 54,400 mi² (140,900 km²) of East Texas, Southern Arkansas, Western Louisiana, and Southeastern Oklahoma. ... The Rio Grande Valley is an area located in the southernmost tip of Texas. ... South Texas is a region of the U.S. state of Texas which lies roughly south of, or beginning at, San Antonio. ... Region in West Texas comprising the area north of the Caprock Escarpment on the Llano Estacado, and extending north into the Texas Panhandle. ... Southeast Texas is a region in the southeast corner of the U.S. state of Texas. ... The Texas Hill Country, as seen from near Interstate 10. ... The Texas Panhandle is a region of the state of Texas consisting of the northernmost 26 counties in the state. ... The dry plains of West Texas, have often been divided up into tracks of land divided by barbed wire fences. ...

Metropolitan
areas

Abilene ǀ Amarillo ǀ AustinRound Rock ǀ BeaumontPort Arthur ǀ BrownsvilleHarlingen ǀ BryanCollege Station ǀ Corpus Christi ǀ DallasFort WorthArlington ǀ El Paso ǀ HoustonSugar LandBaytown ǀ KilleenTemple ǀ Laredo ǀ LongviewMarshall ǀ Lubbock ǀ McAllenEdinburgMission ǀ MidlandOdessa ǀ San Angelo ǀ San Antonio ǀ ShermanDenison ǀ Texarkana ǀ Tyler ǀ Victoria ǀ Waco ǀ Wichita Falls
See also: List of Texas counties Texas has 25 metropolitan areas (MSAs) defined by the United States Census Bureau. ... Nickname: The Friendly Frontier Location within the state of Texas County Taylor County Mayor Norm Archibald Area    - City 286. ... Nickname: The Yellow Rose of Texas, Helium Capital of the World, Rotor City USA Location within the state of Texas Coordinates: Country United States State Texas County Potter (and Randall)  - Mayor Debra McCartt Area    - City  90. ... Nickname: Live Music Capital of the World Location in the state of Texas Coordinates: Country United States State Texas County Travis County  - Mayor Will Wynn Area    - City 669. ... The Round Rock, from which the city takes its name, marked a low water wagon crossing in Brushy Creek. ... Location in the state of Texas Coordinates: Counties Jefferson County  - Mayor Guy Goodson Area    - City 222. ... Port Arthur is a city in Jefferson County within the Beaumont-Port Arthur metropolitan area and is situated in southeast Texas. ... Brownsville is a city in Cameron County, Texas, United States. ... Harlingen is a city in Cameron County in the heart of the Rio Grande Valley of south Texas, United States. ... Bryan is a city in Brazos County, Texas, United States. ... City nicknames: Aggieland, heart of the Research Valley Location in the State of Texas County Brazos County Mayor Ron Silvia Area  - Land  - Water 104. ... Nickname: Sparkling City by the Sea Location in the state of Texas Counties Nueces County Mayor Henry Garrett Area    - City 1,192. ... Nickname: Big D Location in the state of Texas Country United States State Texas Counties Dallas, Collin, Denton, Kaufman, and Rockwall Incorporated 2 February 1856  - Mayor Laura Miller Area    - City  385. ... Nickname: Cowtown, Panther City Motto: Where the West Begins Location in the state of Texas Coordinates: Country United States State Texas Counties Tarrant and Denton  - Mayor Michael J. Moncrief Area    - City  298. ... Official website: http://www. ... Nickname: Star of the Southwest, The Sun City, and Land of the Sun Location in the state of Texas Coordinates: County El Paso County  - Mayor John Cook Area    - City  250. ... Nickname: Space City Location in the state of Texas Coordinates: Country United States State Texas Counties Harris County Fort Bend County Montgomery County Incorporated June 5, 1837  - Mayor Bill White Area    - City  601. ... City nickname: The Land of Sugar City slogan: Sugar Land. ... Baytown is a city located along the Gulf Coast region in the U.S. state of Texas within the Houston–Sugar Land–Baytown metropolitan area. ... Killeen is a city located in Bell County, Texas. ... Temple is a city in Bell County, Texas, United States. ... Nickname: The Gateway City & The City Under Seven Flags Coordinates: Settled 1755 Government type Mayor / City Manager Mayor Raul Salinas Interim City Manager Cynthia Collazo Area    - City 218. ... Flag of Longview Longview is a city in Texas, United States, located between Dallas, TX and Shreveport, LA. The population was 73,345 at the 2000 census. ... Marshall is a major city of the northeastern region of the U.S. state of Texas. ... Nickname: Hub City Location within the state of Texas Coordinates: County Lubbock County Mayor David Miller Area    - City 297. ... McAllen is a city in Hidalgo County, Texas. ... Edinburg is a city in Hidalgo County, Texas, United States. ... Mission is a city located in Hidalgo County, Texas. ... Nickname: The Tall City Location within the state of Texas County Midland County Mayor Mike Canon Area    - City 173. ... Nickname: City of Contrasts Location Location within the state of Texas Government County Ector County Mayor leader_name = Larry Melton {{{leader_name}}} Geographical characteristics Area     City 95. ... Nickname: The Shining Star of Texas Location within the state of Texas County Tom Green County Mayor J.W. Lown Area    - City {{{area_total}}} km²  - Land 144. ... Nickname: Alamo City; River City Location in the state of Texas Coordinates: Counties Bexar County  - Mayor Phil Hardberger Area    - City  412. ... Sherman is a city in Grayson County, Texas, United States. ... Motto: A jewel at the crossing of a great river! Location of Denison, Texas Coordinates: Country United States of America State Texas County Grayson Founded 1872 Mayor Robert Brady Area    - City 59. ... Water tower in Texarkana. ... Tyler is the county seat of Smith County in East Texas, United States. ... Victoria is a city in Victoria County, Texas, United States. ... Waco is the county seat of McLennan County, Texas. ... Nickname: The City that Faith Built Location within the state of Texas County Wichita County Mayor Lanham Lyne Area    - City 70. ... Index: Contents: Top - 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Anderson County formed in 1846 from part of Houston County. ...


  Results from FactBites:
 
HA 730-E Edwards-Trinity aquifer system text (6351 words)
The Edwards aquifer overlies the Trinity aquifer (fig.
The rocks that compose the Edwards-Trinity aquifer are relatively flat-lying and are generally exposed at the land surface in the Trans-Pecos and the Edwards Plateau areas (fig.78).
The aquifer dips to the south and southeast, and is offset by numerous faults (figs.
  More results at FactBites »

 
 

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