Show simple item record

EFFECTS OF BAR FORMATION ON CHANNEL STABILITY AND SEDIMENT LOADS IN AN URBAN WATERSHED

dc.contributor.advisorPrestegaard, Karen Len_US
dc.contributor.authorBlanchet, Zacharyen_US
dc.date.accessioned2010-02-19T07:11:54Z
dc.date.available2010-02-19T07:11:54Z
dc.date.issued2009en_US
dc.identifier.urihttp://hdl.handle.net/1903/10016
dc.description.abstractThis study investigates channel adjustment due to urbanization in the Little Paint Branch creek of the Anacostia River watershed. In the past 15 years, large gravel bars have formed in the channels, more than doubling the active channel width of some reaches. Field data was collected to analyze downstream hydraulic geometry and the effects of gravel bars on shear stress, turbidity, and morphological change. The watershed was gauged at three locations to document the contributions of discharge and sediment to the downstream Anacostia Estuary. The results indicate that Little Paint Branch Creek generates proportionally more runoff per basin area than the watershed does as a whole, even though the impervious surface area is lower in the upstream tributaries, like Little Paint Branch Creek. Bar formation induces channel widening, which decreases flow depth and thus shear stress for bankfull and higher stages. This shoaling limits bed transport and will eventually limit bank erosion.en_US
dc.titleEFFECTS OF BAR FORMATION ON CHANNEL STABILITY AND SEDIMENT LOADS IN AN URBAN WATERSHEDen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentGeologyen_US
dc.subject.pqcontrolledHydrologyen_US
dc.subject.pqcontrolledGeomorphologyen_US
dc.subject.pqcontrolledGeologyen_US
dc.subject.pquncontrolledFluvial Geomorphologyen_US
dc.subject.pquncontrolledRunoffen_US
dc.subject.pquncontrolledSediment Transporten_US
dc.subject.pquncontrolledTurbidityen_US
dc.subject.pquncontrolledUrban Watersheden_US
dc.subject.pquncontrolledUrbanizationen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record