Exploring the role of topography in small channel erosion
Identifieur interne : 000B06 ( Istex/Corpus ); précédent : 000B05; suivant : 000B07Exploring the role of topography in small channel erosion
Auteurs : L. M. De Santisteban ; J. Casalí ; J. J. L Pez ; J. V. Giráldez ; J. Poesen ; J. NachtergaeleSource :
- Earth Surface Processes and Landforms [ 0197-9337 ] ; 2005-05.
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Abstract
Erosion caused by concentrated flows in agricultural areas is responsible for important soil losses, and rapid sediment transfer through the channel network. The main factors controlling concentrated flow erosion rates include the erodibility of soil materials, soil use and management, climate and watershed topography. In this paper, two topographic indices, closely related to mathematical expressions suggested by different authors, are used to characterize the influence of watershed topography on gully erosion. The AS1 index is defined as the product of the watershed area and the partial area‐weighted average slope. The AS2 index is similar to the AS1 but uses the swale slope as the weighting factor. Formally, AS2 is the product of the watershed area and the length‐weighted average swale slope. From studies made using different ephemeral gully erosion databases, it is shown that a high correlation consistently exists between the topographic indices and the volume of eroded soil. The resulting relationships are therefore useful to assess soil losses from gully erosion, to identify the most susceptible watersheds within large areas, and to compare the susceptibility to gully erosion among different catchments. This information is also important in studying the response of natural drainage network systems to different rainfall inputs. Copyright © 2005 John Wiley & Sons, Ltd.
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DOI: 10.1002/esp.1160
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ISTEX:BC3F0DCA22A4E31E809BD4C6933F824858FDF4C5Le document en format XML
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The main factors controlling concentrated flow erosion rates include the erodibility of soil materials, soil use and management, climate and watershed topography. In this paper, two topographic indices, closely related to mathematical expressions suggested by different authors, are used to characterize the influence of watershed topography on gully erosion. The AS1 index is defined as the product of the watershed area and the partial area‐weighted average slope. The AS2 index is similar to the AS1 but uses the swale slope as the weighting factor. Formally, AS2 is the product of the watershed area and the length‐weighted average swale slope. From studies made using different ephemeral gully erosion databases, it is shown that a high correlation consistently exists between the topographic indices and the volume of eroded soil. The resulting relationships are therefore useful to assess soil losses from gully erosion, to identify the most susceptible watersheds within large areas, and to compare the susceptibility to gully erosion among different catchments. This information is also important in studying the response of natural drainage network systems to different rainfall inputs. 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The resulting relationships are therefore useful to assess soil losses from gully erosion, to identify the most susceptible watersheds within large areas, and to compare the susceptibility to gully erosion among different catchments. This information is also important in studying the response of natural drainage network systems to different rainfall inputs. 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V.</givenNames><familyName>Giráldez</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#af3"><personName><givenNames>J.</givenNames><familyName>Poesen</familyName></personName></creator><creator xml:id="au6" creatorRole="author" affiliationRef="#af3"><personName><givenNames>J.</givenNames><familyName>Nachtergaele</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="ES" type="organization"><unparsedAffiliation>Departamento de Proyectos e Ingeniería Rural, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Navarra, Spain</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="ES" type="organization"><unparsedAffiliation>Departamento de Agronomía, Universidad de Córdoba, Apdo. 3048, 14080 Córdoba, Spain</unparsedAffiliation></affiliation><affiliation xml:id="af3" countryCode="BE" type="organization"><unparsedAffiliation>K. U. Leuven, Laboratory for Experimental Geomorphology, Redingenstraat 16, B‐3000 Leuven, Belgium</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">concentrated flow erosion</keyword><keyword xml:id="kwd2">ephemeral gully erosion</keyword><keyword xml:id="kwd3">erosion prediction</keyword><keyword xml:id="kwd4">watershed topography</keyword></keywordGroup><fundingInfo><fundingAgency>Department of Education and Culture of the Government of Navarre</fundingAgency></fundingInfo><fundingInfo><fundingAgency>Spanish Ministry of Science and Technology</fundingAgency><fundingNumber>REN2003‐03028/HID</fundingNumber></fundingInfo><fundingInfo><fundingAgency>US Department of Agriculture</fundingAgency><fundingNumber>58‐6408‐0‐F137</fundingNumber></fundingInfo><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>Erosion caused by concentrated flows in agricultural areas is responsible for important soil losses, and rapid sediment transfer through the channel network. The main factors controlling concentrated flow erosion rates include the erodibility of soil materials, soil use and management, climate and watershed topography. In this paper, two topographic indices, closely related to mathematical expressions suggested by different authors, are used to characterize the influence of watershed topography on gully erosion. The <i>AS1</i> index is defined as the product of the watershed area and the partial area‐weighted average slope. The <i>AS2</i> index is similar to the <i>AS1</i> but uses the swale slope as the weighting factor. Formally, <i>AS2</i> is the product of the watershed area and the length‐weighted average swale slope. From studies made using different ephemeral gully erosion databases, it is shown that a high correlation consistently exists between the topographic indices and the volume of eroded soil. The resulting relationships are therefore useful to assess soil losses from gully erosion, to identify the most susceptible watersheds within large areas, and to compare the susceptibility to gully erosion among different catchments. This information is also important in studying the response of natural drainage network systems to different rainfall inputs. Copyright © 2005 John Wiley & Sons, Ltd.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Exploring the role of topography in small channel erosion</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>The role of topography in channel erosion</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Exploring the role of topography in small channel erosion</title></titleInfo><name type="personal"><namePart type="given">L. M. De</namePart><namePart type="family">Santisteban</namePart><affiliation>Departamento de Proyectos e Ingeniería Rural, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Navarra, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Casalí</namePart><affiliation>Departamento de Proyectos e Ingeniería Rural, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Navarra, Spain</affiliation><affiliation>Departamento de Proyectos e Ingeniería Rural, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Navarra, Spain.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. J.</namePart><namePart type="family">López</namePart><affiliation>Departamento de Proyectos e Ingeniería Rural, Universidad Pública de Navarra, Campus Arrosadía s/n, 31006 Pamplona, Navarra, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J. V.</namePart><namePart type="family">Giráldez</namePart><affiliation>Departamento de Agronomía, Universidad de Córdoba, Apdo. 3048, 14080 Córdoba, Spain</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Poesen</namePart><affiliation>K. U. Leuven, Laboratory for Experimental Geomorphology, Redingenstraat 16, B‐3000 Leuven, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Nachtergaele</namePart><affiliation>K. U. Leuven, Laboratory for Experimental Geomorphology, Redingenstraat 16, B‐3000 Leuven, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>John Wiley & Sons, Ltd.</publisher><place><placeTerm type="text">Chichester, UK</placeTerm></place><dateIssued encoding="w3cdtf">2005-05</dateIssued><dateCaptured encoding="w3cdtf">2003-09-25</dateCaptured><dateValid encoding="w3cdtf">2004-09-06</dateValid><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">2</extent><extent unit="tables">1</extent><extent unit="references">29</extent></physicalDescription><abstract lang="en">Erosion caused by concentrated flows in agricultural areas is responsible for important soil losses, and rapid sediment transfer through the channel network. The main factors controlling concentrated flow erosion rates include the erodibility of soil materials, soil use and management, climate and watershed topography. In this paper, two topographic indices, closely related to mathematical expressions suggested by different authors, are used to characterize the influence of watershed topography on gully erosion. The AS1 index is defined as the product of the watershed area and the partial area‐weighted average slope. The AS2 index is similar to the AS1 but uses the swale slope as the weighting factor. Formally, AS2 is the product of the watershed area and the length‐weighted average swale slope. From studies made using different ephemeral gully erosion databases, it is shown that a high correlation consistently exists between the topographic indices and the volume of eroded soil. The resulting relationships are therefore useful to assess soil losses from gully erosion, to identify the most susceptible watersheds within large areas, and to compare the susceptibility to gully erosion among different catchments. This information is also important in studying the response of natural drainage network systems to different rainfall inputs. Copyright © 2005 John Wiley & Sons, Ltd.</abstract><note type="funding">Department of Education and Culture of the Government of Navarre</note><note type="funding">Spanish Ministry of Science and Technology - No. REN2003‐03028/HID; </note><note type="funding">US Department of Agriculture - No. 58‐6408‐0‐F137; </note><subject lang="en"><genre>keywords</genre><topic>concentrated flow erosion</topic><topic>ephemeral gully erosion</topic><topic>erosion prediction</topic><topic>watershed topography</topic></subject><relatedItem type="host"><titleInfo><title>Earth Surface Processes and Landforms</title><subTitle>The Journal of the British Geomorphological Research Group</subTitle></titleInfo><titleInfo type="abbreviated"><title>Earth Surf. Process. Landforms</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Research Article</topic></subject><identifier type="ISSN">0197-9337</identifier><identifier type="eISSN">1096-9837</identifier><identifier type="DOI">10.1002/(ISSN)1096-9837</identifier><identifier type="PublisherID">ESP</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>30</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>591</start><end>599</end><total>9</total></extent></part></relatedItem><identifier type="istex">BC3F0DCA22A4E31E809BD4C6933F824858FDF4C5</identifier><identifier type="DOI">10.1002/esp.1160</identifier><identifier type="ArticleID">ESP1160</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2005 John Wiley & Sons, Ltd.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Ltd.</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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