A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.
Identifieur interne : 000C54 ( Istex/Corpus ); précédent : 000C53; suivant : 000C55A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.
Auteurs : Nicholas E. Allmendinger ; James E. Pizzuto ; Glenn E. Moglen ; Mikolaj LewickiSource :
- 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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<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>
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L<sc>ewicki</sc>
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<title type="short">A S<sc>ediment</sc>
B<sc>udget for an</sc>
U<sc>rbanizing</sc>
W<sc>atershed</sc>
, 1951‐1996, M<sc>ontgomery Co</sc>
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<abstractGroup><abstract type="main" xml:lang="en"><p><b>Abstract: </b>
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 km<sup>2</sup>
) 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 m<sup>3</sup>
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 m<sup>3</sup>
produced by enlargement of first‐order and second‐order stream channels. We used dendrochronology to estimate that 4,000 m<sup>3</sup>
of sediment was stored on the floodplain from 1951‐1996. The sediment yield from the watershed, obtained by summing upstream contributions, totals 8,100 m<sup>3</sup>
of sediment, or 135 tons/km<sup>2</sup>
/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.</p>
</abstract>
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<noteGroup><note xml:id="fn1"><p> Paper No. J05051 of the <i>Journal of the American Water Resources Association </i>
(JAWRA) <b>Discussions are open until June 1, 2008</b>
.</p>
</note>
</noteGroup>
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<mods version="3.6"><titleInfo lang="en"><title>A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.</title>
</titleInfo>
<titleInfo type="abbreviated" lang="en"><title>A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery Co., Maryland, U.S.A.</title>
</titleInfo>
<titleInfo type="alternative" contentType="CDATA" lang="en"><title>A Sediment Budget for an Urbanizing Watershed, 1951‐1996, Montgomery County, Maryland, U.S.A.1</title>
</titleInfo>
<name type="personal"><namePart type="given">Nicholas E.</namePart>
<namePart type="family">Allmendinger</namePart>
<affiliation>Senior Geomorphologist, Otak, Inc., 10230 NE Points Drive, Suite 400, Kirkland, Washington 98033</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">James E.</namePart>
<namePart type="family">Pizzuto</namePart>
<affiliation>Professor, Department of Geology, University of Delaware, Newark, Delaware 19716</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">Glenn E.</namePart>
<namePart type="family">Moglen</namePart>
<affiliation>Associate Professor, Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland 20742</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">Mikolaj</namePart>
<namePart type="family">Lewicki</namePart>
<affiliation>Postdoctoral Researcher, USDA Forest Service, Rocky Mountain Research Station, Boise, Idaho 83702</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">2007-12</dateIssued>
<edition>Received April 25, 2005; accepted March 29, 2007.</edition>
<copyrightDate encoding="w3cdtf">2007</copyrightDate>
</originInfo>
<language><languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
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<extent unit="figures">11</extent>
<extent unit="tables">4</extent>
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<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.</abstract>
<note type="content">*Paper No. J05051 of the Journal of the American Water Resources Association (JAWRA) Discussions are open until June 1, 2008.</note>
<subject lang="en"><genre>keywords</genre>
<topic>sediment budgets</topic>
<topic>urbanization</topic>
<topic>channel enlargement</topic>
<topic>floodplain stratigraphy</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>2007</date>
<detail type="volume"><caption>vol.</caption>
<number>43</number>
</detail>
<detail type="issue"><caption>no.</caption>
<number>6</number>
</detail>
<extent unit="pages"><start>1483</start>
<end>1498</end>
<total>16</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">16FAA0738C7A4B9B2F0BCBEA9A93C0AD6AF196E1</identifier>
<identifier type="DOI">10.1111/j.1752-1688.2007.00122.x</identifier>
<identifier type="ArticleID">JAWR122</identifier>
<recordInfo><recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
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