A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.
Identifieur interne : 000B54 ( Main/Merge ); précédent : 000B53; suivant : 000B55A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.
Auteurs : Nicholas E. Allmendinger [États-Unis] ; James E. Pizzuto [États-Unis] ; Glenn E. Moglen [États-Unis] ; Mikolaj Lewicki [États-Unis]Source :
- JAWRA Journal of the American Water Resources Association [ 1093-474X ] ; 2007-12.
English descriptors
Abstract
Abstract: Despite widespread interest, few sediment budgets are available to document patterns of erosion and sedimentation in developing watersheds. We assess the sediment budget for the Good Hope Tributary, a small watershed (4.05 km2) in Montgomery County, Maryland, from 1951‐1996. Lacking monitoring data spanning the period of interest, we rely on a variety of indirect and stratigraphic methods. Using regression equations relating sediment yield to construction, we estimated an upland sediment production of 5,700 m3 between 1951 and 1996. Regression equations indicate that channel cross‐sectional area is correlated with the extent of development; these relationships, when combined with historical land use data, suggest that upland sediment yield was augmented by 6,400 m3 produced by enlargement of first‐order and second‐order stream channels. We used dendrochronology to estimate that 4,000 m3 of sediment was stored on the floodplain from 1951‐1996. The sediment yield from the watershed, obtained by summing upstream contributions, totals 8,100 m3 of sediment, or 135 tons/km2/year. These results indicate that upland erosion, channel enlargement, and floodplain storage are all significant components of the sediment budget of our study area, and all three are approximately equal in magnitude. Erosion of “legacy” floodplain sediments originally deposited during poor agricultural practices of the 19th and early 20th Centuries has likely contributed between 0 and 20% of the total sediment yield, indicating that these remobilized deposits are not a dominant component of the sediment yield of our study area.
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DOI: 10.1111/j.1752-1688.2007.00122.x
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.</title><author><name sortKey="Allmendinger, Nicholas E" sort="Allmendinger, Nicholas E" uniqKey="Allmendinger N" first="Nicholas E." last="Allmendinger">Nicholas E. Allmendinger</name></author><author><name sortKey="Pizzuto, James E" sort="Pizzuto, James E" uniqKey="Pizzuto J" first="James E." last="Pizzuto">James E. Pizzuto</name></author><author><name sortKey="Moglen, Glenn E" sort="Moglen, Glenn E" uniqKey="Moglen G" first="Glenn E." last="Moglen">Glenn E. 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Allmendinger</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Washington (État)</region></placeName><wicri:cityArea>Senior Geomorphologist, Otak, Inc., 10230 NE Points Drive, Suite 400, Kirkland</wicri:cityArea></affiliation></author><author><name sortKey="Pizzuto, James E" sort="Pizzuto, James E" uniqKey="Pizzuto J" first="James E." last="Pizzuto">James E. Pizzuto</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Delaware</region></placeName><wicri:cityArea>Professor, Department of Geology, University of Delaware, Newark</wicri:cityArea></affiliation></author><author><name sortKey="Moglen, Glenn E" sort="Moglen, Glenn E" uniqKey="Moglen G" first="Glenn E." last="Moglen">Glenn E. Moglen</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Maryland</region></placeName><wicri:cityArea>Associate Professor, Department of Civil and Environmental Engineering, University of Maryland, College Park</wicri:cityArea></affiliation></author><author><name sortKey="Lewicki, Mikolaj" sort="Lewicki, Mikolaj" uniqKey="Lewicki M" first="Mikolaj" last="Lewicki">Mikolaj Lewicki</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Idaho</region></placeName><wicri:cityArea>Postdoctoral Researcher, USDA Forest Service, Rocky Mountain Research Station, Boise</wicri:cityArea></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="2007-12">2007-12</date><biblScope unit="volume">43</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="1483">1483</biblScope><biblScope unit="page" to="1498">1498</biblScope></imprint><idno type="ISSN">1093-474X</idno></series><idno type="istex">16FAA0738C7A4B9B2F0BCBEA9A93C0AD6AF196E1</idno><idno type="DOI">10.1111/j.1752-1688.2007.00122.x</idno><idno type="ArticleID">JAWR122</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1093-474X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>channel enlargement</term><term>floodplain stratigraphy</term><term>sediment budgets</term><term>urbanization</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Abstract: Despite widespread interest, few sediment budgets are available to document patterns of erosion and sedimentation in developing watersheds. We assess the sediment budget for the Good Hope Tributary, a small watershed (4.05 km2) in Montgomery County, Maryland, from 1951‐1996. Lacking monitoring data spanning the period of interest, we rely on a variety of indirect and stratigraphic methods. Using regression equations relating sediment yield to construction, we estimated an upland sediment production of 5,700 m3 between 1951 and 1996. Regression equations indicate that channel cross‐sectional area is correlated with the extent of development; these relationships, when combined with historical land use data, suggest that upland sediment yield was augmented by 6,400 m3 produced by enlargement of first‐order and second‐order stream channels. We used dendrochronology to estimate that 4,000 m3 of sediment was stored on the floodplain from 1951‐1996. The sediment yield from the watershed, obtained by summing upstream contributions, totals 8,100 m3 of sediment, or 135 tons/km2/year. These results indicate that upland erosion, channel enlargement, and floodplain storage are all significant components of the sediment budget of our study area, and all three are approximately equal in magnitude. Erosion of “legacy” floodplain sediments originally deposited during poor agricultural practices of the 19th and early 20th Centuries has likely contributed between 0 and 20% of the total sediment yield, indicating that these remobilized deposits are not a dominant component of the sediment yield of our study area.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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