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dc.contributor.authorBezak, Bethany J.en_US
dc.description.abstractTo quantify sediment contributions due to urban channel enlargement, 50 study sites were selected on 1st- through 3rd-order streams, in watersheds with varying levels of urbanization, in two Physiographic Regions (Coastal Plain and Piedmont), and in the Coastal Zone Management Area of Virginia. At each site, riffle cross-sectional and longitudinal surveys were conducted to measure the channel morphology. Enlargement ratios for bankfull cross-sectional parameters were calculated to quantify channel change relative to stable streams (from regional curves). Relationships between dependent, channel characteristics and watershed-scale, independent variables were assessed. The main objectives were to: 1) test for differences in the morphological features between Coastal Plain and Piedmont streams; 2) develop relationships between watershed-level, urbanization characteristics and stream morphological features; and, 3) determine if relationships exist between watershed urbanization and channel enlargement ratios to estimate sediment loading from urban streams for use in statewide nonpoint source pollution assessment activities.

It was determined that: 1) for a given watershed area, streams in the Piedmont tended to be larger than those in the Coastal Plain Region (for regional curve streams and for project streams); 2) among all project sites and sites in the Piedmont, watershed area was the best indicator of channel morphology, but among the Coastal Plain sites, the number of road crossings over streams was the best indicator of channel morphology; and, 3) few significant relationships between enlargement ratios and watershed urbanization variables existed; however, one commonality observed across all sites was an inverse relationship between watershed area and channel enlargement ratios.

dc.publisherVirginia Techen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.titleUrban Channel Erosion Quantification in Upland Coastal Zone Streams of Virginia, USAen_US
dc.contributor.departmentBiological Systems Engineeringen_US
dc.description.degreeMaster of Scienceen_US of Scienceen_US Polytechnic Institute and State Universityen_US Systems Engineeringen_US
dc.contributor.committeechairHession, William Cullyen_US
dc.contributor.committeememberWynn, Theresa M.en_US
dc.contributor.committeememberYagow, Geneen_US
dc.contributor.committeememberDaniels, Walter Leeen_US

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