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An analysis of the SCS method in the simulation of stormwater disconnection in an urban watershed
Descriptive
TitleInfo
Title
An analysis of the SCS method in the simulation of stormwater disconnection in an urban watershed
Name
(type = personal)
NamePart
(type = family)
Althouse
NamePart
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Eileen M.
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Eileen Althouse
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author
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Obropta
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Christopher
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Advisory Committee
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Christopher Obropta
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chair
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Uchrin
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Christopher
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Advisory Committee
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Christopher Uchrin
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internal member
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Vowinkel
NamePart
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Eric
Affiliation
Advisory Committee
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Eric Vowinkel
Role
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outside member
Name
(type = personal)
NamePart
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Althouse
NamePart
(type = given)
Eileen M.
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Eileen Althouse
Role
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(authority = RUETD)
author
Name
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NamePart
Rutgers University
Role
RoleTerm
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degree grantor
Name
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NamePart
Graduate School-New Brunswick
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school
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Text
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theses
OriginInfo
DateCreated
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2007
DateOther
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(type = degree)
2007
Language
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(authority = ISO 639-3:2007);
(type = text)
English
PhysicalDescription
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electronic
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application/pdf
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text/xml
Extent
ix, 166 pages
Abstract
(type = abstract)
Small storms can have adverse affects on downstream water quality in urbanizingwatersheds because impervious surfaces convey greater volumes of runoff and lead to largerstorm flows than under natural conditions (Booth 1990; Beard and Chang 1979). Therefore management of the water quality storm (1.25" of rain over 2 hours) has been targeted in water quality initiatives. This study examined whether reducing the effective impervious area that contributes runoff during the water quality storm by disconnecting it from the stormwater conveyance system could be a viable stormwater management solution in existing residential areas. Disconnection was examined in the Pompeston Creek Watershed, Burlington County, New Jersey on the lot, subdivision, and watershed scale. A calibrated HEC-HMS model of the watershed was used for the watershed scale analysis. The SCS equations to were applied to simulate disconnection by routing runoff from the disconnected impervious surface over an adjacent impervious surface. The 2, 10, and 100-year storms were examined in addition to the water quality storm. Three primary conclusions were made: 1) the composite curve number method, and therefore the composite curve numbers given in TR-55, under-predicts small storm runoff when compared to the volume weighted method because the composite curve number does not account for the runoff conveyed by directly connected impervious surfaces in urbanizing areas; 2) by disconnecting the runoff from the impervious areas by routing it over the pervious area, the runoff volume can be reduced for the water quality storm; 3) the effectiveness of disconnection in mitigating the runoff volumes relies on the infiltration capacity of the pervious area. Both the extent of the under-prediction of the composite curve number and the relative volume reduction achieved by disconnection decrease as storm depth increases. The adjustment of the basin curve number during model calibration for small observed storm events suggested that the original composite curve number method was inadequate in predicting runoff in the watershed scale model for small storms. Basin-wide reductions in runoff volumes with the application of basin-wide disconnection were consistent with the reductions predicted on the smaller scales.
These results have a direct application to regional stormwater management planning as disconnection can be a suitable retrofit for the management of the small storm in existing residential areas.
These results have a direct application to regional stormwater management planning as disconnection can be a suitable retrofit for the management of the small storm in existing residential areas.
Note
(type = degree)
M.S.
Note
(type = bibliography)
Includes bibliographical references (p. 162-165).
Subject
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Topic
Bioresource Engineering
Subject
(authority = ETD-LCSH)
Topic
Runoff--Management
Subject
(authority = ETD-LCSH)
Topic
Watersheds
RelatedItem
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TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier
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rucore19991600001
Identifier
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.12829
Identifier
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rutgers-lib:21775
Identifier
ETD_210
Identifier
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doi:10.7282/T3Q81DJW
Location
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NjNbRU
Subject
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Geographic
Burlington County (N.J.)
Genre
(authority = ExL-Esploro)
ETD graduate
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Rights
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The author owns the copyright to this work.
Copyright
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Copyright protected
Availability
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Open
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Name
Eileen Althouse
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Copyright holder
Affiliation
Rutgers University. Graduate School-New Brunswick
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Non-exclusive ETD license
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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