Show simple item record

dc.contributor.advisorParr, A. David
dc.contributor.authorScott, Matthew Allen
dc.date.accessioned2012-10-27T10:11:22Z
dc.date.available2012-10-27T10:11:22Z
dc.date.issued2012-08-31
dc.date.submitted2012
dc.identifier.otherhttp://dissertations.umi.com/ku:12243
dc.identifier.urihttp://hdl.handle.net/1808/10201
dc.description.abstractMany communities in the United States have enacted ordinances requiring that areas surrounding natural channels be preserved in a natural state. These areas are commonly referred to as "stream-buffers". One of the goals of the stream-buffer is to preserve dense overbank vegetation. This has the effect of attenuating peak flows during flood events which inundate the channel overbanks. The goal of this study is to use state-of-the-practice hydrologic and hydraulic models to estimate peak-flow attenuation provided by stream-buffers using vertical variation in Manning's n values. Accounting for vertical variation in Manning's n values in overbanks allows for simulation of the roughness of the overbank provided by zones of vegetation. Typical zones include dense grasses and undergrowth at low overbank depths as well as heavily treed zones at higher depths. An existing 2.6 miles stream reach was evaluated for this study. Hydrologic modeling was completed using HEC-HMS and hydraulic modeling was completed using HEC-RAS. Existing models completed for the Blue River Watershed Study in Johnson County, Kansas, were modified for use in this study. A maximum peak-flow attenuation of 20% was observed for the 2-year and 50-year events over 3,110 feet. The highest maximum peak-flow reductions were observed for events ranging from the 2-year and 100-year events, and a smaller maximum reduction was observed for the 500-year event. Another goal of this study was to compare the results to stream-buffer ordinances in Johnson County to evaluate if they provide the maximum attenuation of peak flows possible at the case study site. The results showed that maximum attenuation is achieved by the ordinances for events ranging from the 2- to 10-year events.
dc.format.extent42 pages
dc.language.isoen
dc.publisherUniversity of Kansas
dc.rightsThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
dc.subjectCivil engineering
dc.subjectWater resource management
dc.subjectEngineering
dc.subjectModified-puls
dc.subjectOverbank flow attenuation
dc.subjectPeak flow attenuation
dc.subjectStream buffer
dc.subjectVertical variation in manning's n
dc.titleAn Analysis of Flow Attenuation Provided by Stream-Buffer Ordinances in Johnson County, Kansas
dc.typeThesis
dc.contributor.cmtememberMcEnroe, Bruce
dc.contributor.cmtememberYoung, Bryan
dc.thesis.degreeDisciplineCivil, Environmental, & Architectural Engineering
dc.thesis.degreeLevelM.E.
kusw.oastatusna
kusw.oapolicyThis item does not meet KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record