NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN
Identifieur interne : 001236 ( Istex/Corpus ); précédent : 001235; suivant : 001237NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN
Auteurs : Cherie V. Miller ; Janet M. Denis ; Scott W. Ator ; John W. BrakebillSource :
- JAWRA Journal of the American Water Resources Association [ 1093-474X ] ; 1997-12.
English descriptors
- KwdEn :
Abstract
ABSTRACT: A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.
Url:
DOI: 10.1111/j.1752-1688.1997.tb03543.x
Links to Exploration step
ISTEX:20C6E34B6CCA776AC6D6B40CD3FED26941700BEFLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title><author><name sortKey="Miller, Cherie V" sort="Miller, Cherie V" uniqKey="Miller C" first="Cherie V." last="Miller">Cherie V. Miller</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Denis, Janet M" sort="Denis, Janet M" uniqKey="Denis J" first="Janet M." last="Denis">Janet M. Denis</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Ator, Scott W" sort="Ator, Scott W" uniqKey="Ator S" first="Scott W." last="Ator">Scott W. Ator</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Brakebill, John W" sort="Brakebill, John W" uniqKey="Brakebill J" first="John W." last="Brakebill">John W. Brakebill</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:20C6E34B6CCA776AC6D6B40CD3FED26941700BEF</idno><date when="1997" year="1997">1997</date><idno type="doi">10.1111/j.1752-1688.1997.tb03543.x</idno><idno type="url">https://api.istex.fr/document/20C6E34B6CCA776AC6D6B40CD3FED26941700BEF/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001236</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001236</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title><author><name sortKey="Miller, Cherie V" sort="Miller, Cherie V" uniqKey="Miller C" first="Cherie V." last="Miller">Cherie V. Miller</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Denis, Janet M" sort="Denis, Janet M" uniqKey="Denis J" first="Janet M." last="Denis">Janet M. Denis</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Ator, Scott W" sort="Ator, Scott W" uniqKey="Ator S" first="Scott W." last="Ator">Scott W. Ator</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author><author><name sortKey="Brakebill, John W" sort="Brakebill, John W" uniqKey="Brakebill J" first="John W." last="Brakebill">John W. Brakebill</name><affiliation><mods:affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">JAWRA Journal of the American Water Resources Association</title><idno type="ISSN">1093-474X</idno><idno type="eISSN">1752-1688</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="1997-12">1997-12</date><biblScope unit="volume">33</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="1155">1155</biblScope><biblScope unit="page" to="1171">1171</biblScope></imprint><idno type="ISSN">1093-474X</idno></series><idno type="istex">20C6E34B6CCA776AC6D6B40CD3FED26941700BEF</idno><idno type="DOI">10.1111/j.1752-1688.1997.tb03543.x</idno><idno type="ArticleID">JAWR1155</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1093-474X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Potomac River</term><term>land use</term><term>nitrogen</term><term>nutrients</term><term>phosphorus</term><term>streams</term><term>surface water</term><term>water quality</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">ABSTRACT: A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Cherie V. Miller</name><affiliations><json:string>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</json:string></affiliations></json:item><json:item><name>Janet M. Denis</name><affiliations><json:string>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</json:string></affiliations></json:item><json:item><name>Scott W. Ator</name><affiliations><json:string>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</json:string></affiliations></json:item><json:item><name>John W. Brakebill</name><affiliations><json:string>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>water quality</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>land use</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>nutrients</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>phosphorus</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>nitrogen</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Potomac River</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>streams</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>surface water</value></json:item></subject><articleId><json:string>JAWR1155</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>ABSTRACT: A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.</abstract><qualityIndicators><score>8.464</score><pdfVersion>1.4</pdfVersion><pdfPageSize>588 x 783.84 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1736</abstractCharCount><pdfWordCount>9400</pdfWordCount><pdfCharCount>61013</pdfCharCount><pdfPageCount>17</pdfPageCount><abstractWordCount>247</abstractWordCount></qualityIndicators><title>NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title><genre><json:string>article</json:string></genre><host><volume>33</volume><publisherId><json:string>JAWR</json:string></publisherId><pages><total>17</total><last>1171</last><first>1155</first></pages><issn><json:string>1093-474X</json:string></issn><issue>6</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1752-1688</json:string></eissn><title>JAWRA Journal of the American Water Resources Association</title><doi><json:string>10.1111/(ISSN)1752-1688</json:string></doi></host><categories><wos><json:string>science</json:string><json:string>water resources</json:string><json:string>geosciences, multidisciplinary</json:string><json:string>engineering, environmental</json:string></wos><scienceMetrix><json:string>applied sciences</json:string><json:string>engineering</json:string><json:string>environmental engineering</json:string></scienceMetrix></categories><publicationDate>1997</publicationDate><copyrightDate>1997</copyrightDate><doi><json:string>10.1111/j.1752-1688.1997.tb03543.x</json:string></doi><id>20C6E34B6CCA776AC6D6B40CD3FED26941700BEF</id><score>0.044782564</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/20C6E34B6CCA776AC6D6B40CD3FED26941700BEF/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/20C6E34B6CCA776AC6D6B40CD3FED26941700BEF/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/20C6E34B6CCA776AC6D6B40CD3FED26941700BEF/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><availability><p>WILEY</p></availability><date>1997</date></publicationStmt><notesStmt><note type="content">*Paper No. 96179 of the Journal of the American Water Resources Association (formerly Water Resources Bulletin). Discussions are open until August 1, 1998.</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title><author xml:id="author-1"><persName><forename type="first">Cherie V.</forename><surname>Miller</surname></persName><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation></author><author xml:id="author-2"><persName><forename type="first">Janet M.</forename><surname>Denis</surname></persName><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation></author><author xml:id="author-3"><persName><forename type="first">Scott W.</forename><surname>Ator</surname></persName><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation></author><author xml:id="author-4"><persName><forename type="first">John W.</forename><surname>Brakebill</surname></persName><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation></author></analytic><monogr><title level="j">JAWRA Journal of the American Water Resources Association</title><idno type="pISSN">1093-474X</idno><idno type="eISSN">1752-1688</idno><idno type="DOI">10.1111/(ISSN)1752-1688</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="1997-12"></date><biblScope unit="volume">33</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="1155">1155</biblScope><biblScope unit="page" to="1171">1171</biblScope></imprint></monogr><idno type="istex">20C6E34B6CCA776AC6D6B40CD3FED26941700BEF</idno><idno type="DOI">10.1111/j.1752-1688.1997.tb03543.x</idno><idno type="ArticleID">JAWR1155</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1997</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>ABSTRACT: A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>water quality</term></item><item><term>land use</term></item><item><term>nutrients</term></item><item><term>phosphorus</term></item><item><term>nitrogen</term></item><item><term>Potomac River</term></item><item><term>streams</term></item><item><term>surface water</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1997-12">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/20C6E34B6CCA776AC6D6B40CD3FED26941700BEF/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 Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1752-1688</doi><issn type="print">1093-474X</issn><issn type="electronic">1752-1688</issn><idGroup><id type="product" value="JAWR"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF AMERICAN WATER RESOURCES ASSOCIATION">JAWRA Journal of the American Water Resources Association</title></titleGroup></publicationMeta><publicationMeta level="part" position="12006"><doi origin="wiley">10.1111/jawr.1997.33.issue-6</doi><numberingGroup><numbering type="journalVolume" number="33">33</numbering><numbering type="journalIssue" number="6">6</numbering></numberingGroup><coverDate startDate="1997-12">December 1997</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="0115500" status="forIssue"><doi origin="wiley">10.1111/j.1752-1688.1997.tb03543.x</doi><idGroup><id type="unit" value="JAWR1155"></id></idGroup><countGroup><count type="pageTotal" number="17"></count></countGroup><eventGroup><event type="firstOnline" date="2007-06-08"></event><event type="publishedOnlineFinalForm" date="2007-06-08"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.5 mode:FullText source:HeaderRef result:HeaderRef" date="2010-04-07"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-28"></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="1155">1155</numbering><numbering type="pageLast" number="1171">1171</numbering></numberingGroup><linkGroup><link type="toTypesetVersion" href="file:JAWR.JAWR1155.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="referenceTotal" number="49"></count><count type="linksCrossRef" number="5"></count></countGroup><titleGroup><title type="main">NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN<link href="#fn1"><sup>1</sup></link></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>Cherie V.</givenNames><familyName>Miller</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>Janet M.</givenNames><familyName>Denis</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>Scott W.</givenNames><familyName>Ator</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a1"><personName><givenNames>John W.</givenNames><familyName>Brakebill</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="US"><unparsedAffiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">water quality</keyword><keyword xml:id="k2">land use</keyword><keyword xml:id="k3">nutrients</keyword><keyword xml:id="k4">phosphorus</keyword><keyword xml:id="k5">nitrogen</keyword><keyword xml:id="k6">Potomac River</keyword><keyword xml:id="k7">streams</keyword><keyword xml:id="k8">surface water</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><p><b>ABSTRACT: </b> A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="fn1"><label>1</label><p>Paper No. 96179 of the <i>Journal of the American Water Resources Association</i> (formerly <i>Water Resources Bulletin</i>). Discussions are open until August 1, 1998.</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN1</title></titleInfo><name type="personal"><namePart type="given">Cherie V.</namePart><namePart type="family">Miller</namePart><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Janet M.</namePart><namePart type="family">Denis</namePart><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Scott W.</namePart><namePart type="family">Ator</namePart><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">John W.</namePart><namePart type="family">Brakebill</namePart><affiliation>Respectively, Hydrologists and Geographer, U.S. Geological Survey, Water Resources Division, 8987 Yellow Brick Road, Baltimore, Maryland 21237.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">1997-12</dateIssued><copyrightDate encoding="w3cdtf">1997</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="references">49</extent></physicalDescription><abstract>ABSTRACT: A regional assessment of water quality in small streams was conducted within four areas of distinct physiography and lithology in the upper Potomac River Basin. The Potomac River is a major tributary to the Chesapeake Bay, and this study provides new insight on the relationships between nutrient concentrations in small streams and watershed characteristics within this river basin. Nutrient concentrations were compared to land‐use data including categories for agriculture (cropland and pasture), urban areas, and forests. Among agricultural areas, streams draining areas of intense row cropping typically contained higher nitrate concentrations than did those draining pastures. Streams draining forested areas typically had the lowest nutrient concentrations. Streams in areas underlain by carbonate bedrock were more likely to contain elevated concentrations of inorganic nitrogen and potassium than did streams in areas underlain by fractured siliciclastic or crystalline rocks, and we suggest that this is a physical phenomenon related to high hydraulic conductivities in carbonate ground‐water systems. The median nitrate concentrations were highest in the Great Valley portion of the Valley and Ridge physiographic province, particularly in watersheds that have both carbonate bedrock and intensive row cropping. Values of nitrate in these streams ranged up to 8.99 mg/L as nitrogen. The soluble phosphorus concentrations during baseflow were generally low in all sub‐units, even in some settings with potential for high phosphorus inputs such as urban areas with municipal point sources or agricultural areas. The mobility of phosphorus in these environments may be hindered by adsorption and geochemical reactions.</abstract><note type="content">*Paper No. 96179 of the Journal of the American Water Resources Association (formerly Water Resources Bulletin). Discussions are open until August 1, 1998.</note><subject lang="en"><genre>keywords</genre><topic>water quality</topic><topic>land use</topic><topic>nutrients</topic><topic>phosphorus</topic><topic>nitrogen</topic><topic>Potomac River</topic><topic>streams</topic><topic>surface water</topic></subject><relatedItem type="host"><titleInfo><title>JAWRA Journal of the American Water Resources Association</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">1093-474X</identifier><identifier type="eISSN">1752-1688</identifier><identifier type="DOI">10.1111/(ISSN)1752-1688</identifier><identifier type="PublisherID">JAWR</identifier><part><date>1997</date><detail type="volume"><caption>vol.</caption><number>33</number></detail><detail type="issue"><caption>no.</caption><number>6</number></detail><extent unit="pages"><start>1155</start><end>1171</end><total>17</total></extent></part></relatedItem><identifier type="istex">20C6E34B6CCA776AC6D6B40CD3FED26941700BEF</identifier><identifier type="DOI">10.1111/j.1752-1688.1997.tb03543.x</identifier><identifier type="ArticleID">JAWR1155</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Agronomie/explor/SisAgriV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001236 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 001236 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Agronomie
|area= SisAgriV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:20C6E34B6CCA776AC6D6B40CD3FED26941700BEF
|texte= NUTRIENTS IN STREAMS DURING BASEFLOW IN SELECTED ENVIRONMENTAL SEVFINGS OF THE POTOMAC RiVER BASIN
}}
| This area was generated with Dilib version V0.6.28. |  |