Estimated depth to the water table and estimated rate of recharge in outcrops of the Chicot and Evangeline aquifers near Houston, Texas

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dc.acquisition-srcen_US
dc.call-noGB 701 .W375 no.96-4018 GBAYen_US
dc.contract-noen_US
dc.contributor.authorNoble, J.E., et alen_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:37:51Z
dc.date.available2010-02-15T17:37:51Z
dc.date.issued1996en_US
dc.degreeen_US
dc.description19 pgs.en_US
dc.description-otheren_US
dc.description.abstractIn 1989, the U.S. geological survey, in cooperation with the Harris Galveston coastal subsidence district, began a field study to determine the depth to the water table and to estimate the rate of recharge in outcrops of the Chicot and Evangeline aquifers near Houston, Texas. The study area comprises about 2,000 square miles of outcrops of the Chicot and Evangeline aquifers in northwest Harris county, Montgomery county, and southern Walker county. Because of the scarcity of measurable water-table wells, depth to the water table below land surface was estimated using a surface geophysical technique, seismic refraction. The water table in the study area generally ranges from about 10 to 30 feet below land surface and typically is deeper in areas of relatively high land surface altitude. The water table has demonstrated no long term trends since ground water development began, with the probable exception of the water table in the Katy area: There the water table is more than 75 feet deep, probably due to ground water pumpage from deeper zones. An estimated rate of recharge in the aquifer outcrops was computed using the interface method in which environmental tritium is a ground water tracer. The estimated average total recharge rate in the study area is 6 inches per year. This rate is an upper bound on the average recharge rate during the 37 years 1953-90 because it is based on the deepest penetration (about 80 feet) of postnuclear- testing tritium concentrations. The rate, which represents one of several components of a complex regional hydrologic budget, is considered reasonable but is not definitive because of uncertainty regarding the assumptions and parameters used in its computation.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeChicot Aquiferen_US
dc.geo-codeEvangeline Aquiferen_US
dc.geo-codeHarrisen_US
dc.geo-codeGalvestonen_US
dc.geo-codeHoustonen_US
dc.geo-codeTexasen_US
dc.geo-codeUnited Statesen_US
dc.history10/21/05 easen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/26272
dc.latitudeen_US
dc.locationGBIC Circulating Collectionen_US
dc.longitudeen_US
dc.notesI folded map present in back pocket.en_US
dc.placeAustin, TXen_US
dc.publisherU.S. Department of the Interior, U.S. Geological Surveyen_US
dc.relation.ispartofseries9175.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesU.S. Geological Survey water resources investigations report no. 96-4018en_US
dc.subjectwateren_US
dc.subjectrechargeen_US
dc.subjectsubsidenceen_US
dc.subjectcoastal zone managementen_US
dc.titleEstimated depth to the water table and estimated rate of recharge in outcrops of the Chicot and Evangeline aquifers near Houston, Texasen_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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