Impact of land use and land cover change on groundwater recharge and quality in the southwestern US
Identifieur interne : 001056 ( Istex/Corpus ); précédent : 001055; suivant : 001057Impact of land use and land cover change on groundwater recharge and quality in the southwestern US
Auteurs : Bridget R. Scanlon ; Robert C. Reedy ; David A. Stonestrom ; David E. Prudic ; Kevin F. DennehySource :
- Global Change Biology [ 1354-1013 ] ; 2005-10.
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- KwdEn :
Abstract
Humans have exerted large‐scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes <0.1 mm yr−1) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr−1); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr−1). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.
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DOI: 10.1111/j.1365-2486.2005.01026.x
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ISTEX:82CDF28A293EEA90A464DFED82DC928959F8348FLe document en format XML
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The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes <0.1 mm yr−1) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr−1); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr−1). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Bridget R. Scanlon</name><affiliations><json:string>University of Texas at Austin, Bureau of Economic Geology, Jackson School of Geosciences, 10100 Burnet Rd., Austin, TX 78758, USA,</json:string></affiliations></json:item><json:item><name>Robert C. Reedy</name><affiliations><json:string>University of Texas at Austin, Bureau of Economic Geology, Jackson School of Geosciences, 10100 Burnet Rd., Austin, TX 78758, USA,</json:string></affiliations></json:item><json:item><name>David A. 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The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes >0.1 mm yr−1) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr−1); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr−1). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. 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The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes <0.1 mm yr−1) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr−1); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr−1). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>agriculture</term></item><item><term>dryland</term></item><item><term>ecohydrology</term></item><item><term>global change</term></item><item><term>groundwater contamination</term></item><item><term>groundwater recharge</term></item><item><term>irrigation</term></item><item><term>land cover</term></item><item><term>land use</term></item><item><term>nitrate</term></item><item><term>nitrogen</term></item><item><term>water resources</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2005-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/82CDF28A293EEA90A464DFED82DC928959F8348F/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Science Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-2486</doi><issn type="print">1354-1013</issn><issn type="electronic">1365-2486</issn><idGroup><id type="product" value="GCB"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="GLOBAL CHANGE BIOLOGY">Global Change Biology</title></titleGroup></publicationMeta><publicationMeta level="part" position="10010"><doi origin="wiley">10.1111/gcb.2005.11.issue-10</doi><numberingGroup><numbering type="journalVolume" number="11">11</numbering><numbering type="journalIssue" number="10">10</numbering></numberingGroup><coverDate startDate="2005-10">October 2005</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="3" status="forIssue"><doi origin="wiley">10.1111/j.1365-2486.2005.01026.x</doi><idGroup><id type="unit" value="GCB1026"></id><id type="supplier" value="1026"></id></idGroup><countGroup><count type="pageTotal" number="1"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><eventGroup><event type="firstOnline" date="2005-09-19"></event><event type="publishedOnlineFinalForm" date="2005-09-19"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.4 mode:FullText source:FullText result:FullText" date="2010-03-30"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-25"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-23"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="1577">1577</numbering><numbering type="pageLast" number="1593">1593</numbering></numberingGroup><correspondenceTo> Bridget R. Scanlon, fax +1 512 471 0140, e‐mail: <email normalForm="bridget.scanlon@beg.utexas.edu">bridget.scanlon@beg.utexas.edu</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:GCB.GCB1026.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received 6 January 2005; revised version received and accepted 21 April 2005</unparsedEditorialHistory><countGroup><count type="figureTotal" number="14"></count><count type="tableTotal" number="5"></count><count type="formulaTotal" number="4"></count><count type="referenceTotal" number="61"></count><count type="wordTotal" number="11652"></count><count type="linksCrossRef" number="137"></count></countGroup><titleGroup><title type="main">Impact of land use and land cover change on groundwater recharge and quality in the southwestern US</title><title type="shortAuthors">B. R. SCANLON <i>et al.</i></title><title type="short">IMPACTS OF LU/LC CHANGES ON RECHARGE</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Bridget R.</givenNames><familyName>Scanlon</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>Robert C.</givenNames><familyName>Reedy</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>David A.</givenNames><familyName>Stonestrom</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>David E.</givenNames><familyName>Prudic</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a4"><personName><givenNames>Kevin F.</givenNames><familyName>Dennehy</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="US"><unparsedAffiliation>University of Texas at Austin, Bureau of Economic Geology, Jackson School of Geosciences, 10100 Burnet Rd., Austin, TX 78758, USA,</unparsedAffiliation></affiliation><affiliation xml:id="a2"><unparsedAffiliation>US Geological Survey, Menlo Park, Mail Stop 421, 345 Middlefield Rd., Menlo Park, CA 94025, USA,</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="US"><unparsedAffiliation>US Geological Survey, 333 W. Nye Lane, Suite 203, Carson City, Nevada 89706, USA,</unparsedAffiliation></affiliation><affiliation xml:id="a4" countryCode="US"><unparsedAffiliation>US Geological Survey, 411 National Center, Reston, Virginia 20192, USA</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">agriculture</keyword><keyword xml:id="k2">dryland</keyword><keyword xml:id="k3">ecohydrology</keyword><keyword xml:id="k4">global change</keyword><keyword xml:id="k5">groundwater contamination</keyword><keyword xml:id="k6">groundwater recharge</keyword><keyword xml:id="k7">irrigation</keyword><keyword xml:id="k8">land cover</keyword><keyword xml:id="k9">land use</keyword><keyword xml:id="k10">nitrate</keyword><keyword xml:id="k11">nitrogen</keyword><keyword xml:id="k12">water resources</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Humans have exerted large‐scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes <0.1 mm yr<sup>−1</sup>) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr<sup>−1</sup>); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr<sup>−1</sup>). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Impact of land use and land cover change on groundwater recharge and quality in the southwestern US</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>IMPACTS OF LU/LC CHANGES ON RECHARGE</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Impact of land use and land cover change on groundwater recharge and quality in the southwestern US</title></titleInfo><name type="personal"><namePart type="given">Bridget R.</namePart><namePart type="family">Scanlon</namePart><affiliation>University of Texas at Austin, Bureau of Economic Geology, Jackson School of Geosciences, 10100 Burnet Rd., Austin, TX 78758, USA,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Robert C.</namePart><namePart type="family">Reedy</namePart><affiliation>University of Texas at Austin, Bureau of Economic Geology, Jackson School of Geosciences, 10100 Burnet Rd., Austin, TX 78758, USA,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">David A.</namePart><namePart type="family">Stonestrom</namePart><affiliation>US Geological Survey, Menlo Park, Mail Stop 421, 345 Middlefield Rd., Menlo Park, CA 94025, USA,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">David E.</namePart><namePart type="family">Prudic</namePart><affiliation>US Geological Survey, 333 W. Nye Lane, Suite 203, Carson City, Nevada 89706, USA,</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Kevin F.</namePart><namePart type="family">Dennehy</namePart><affiliation>US Geological Survey, 411 National Center, Reston, Virginia 20192, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Science Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2005-10</dateIssued><edition>Received 6 January 2005; revised version received and accepted 21 April 2005</edition><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">14</extent><extent unit="tables">5</extent><extent unit="formulas">4</extent><extent unit="references">61</extent><extent unit="words">11652</extent></physicalDescription><abstract lang="en">Humans have exerted large‐scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore‐water‐pressure) potential and environmental‐tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes <0.1 mm yr−1) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate‐to‐high recharge in irrigated agricultural ecosystems (high matric potentials; low‐to‐moderate chloride and nitrate concentrations) (AD recharge: ∼130–640 mm yr−1); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: ∼9–32 mm yr−1). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.</abstract><subject lang="en"><genre>keywords</genre><topic>agriculture</topic><topic>dryland</topic><topic>ecohydrology</topic><topic>global change</topic><topic>groundwater contamination</topic><topic>groundwater recharge</topic><topic>irrigation</topic><topic>land cover</topic><topic>land use</topic><topic>nitrate</topic><topic>nitrogen</topic><topic>water resources</topic></subject><relatedItem type="host"><titleInfo><title>Global Change Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">1354-1013</identifier><identifier type="eISSN">1365-2486</identifier><identifier type="DOI">10.1111/(ISSN)1365-2486</identifier><identifier type="PublisherID">GCB</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>11</number></detail><detail type="issue"><caption>no.</caption><number>10</number></detail><extent unit="pages"><start>1577</start><end>1593</end><total>1</total></extent></part></relatedItem><identifier type="istex">82CDF28A293EEA90A464DFED82DC928959F8348F</identifier><identifier type="DOI">10.1111/j.1365-2486.2005.01026.x</identifier><identifier type="ArticleID">GCB1026</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Science Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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