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dc.contributor.advisorLerch, Robert N.eng
dc.contributor.authorWillett, Cammy D.eng
dc.coverage.spatialMissourieng
dc.date.issued2010eng
dc.date.submitted2010 Springeng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on June 21, 2010).eng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionThesis advisor: Dr. Robert N. Lerch.eng
dc.descriptionM.S. University of Missouri--Columbia 2010.eng
dc.description.abstractSedimentation and herbicide are significant water quality concerns in claypan watersheds. Two separate watershed-scale studies were conducted in the Central Claypan Region of northeastern Missouri. One project investigated the effects of season, land use, and stream order on streambank erosion rates within Crooked and Otter Creek watersheds. Season was found to be the most significant factor controlling bank erosion rates, while the land use and stream order effects were not significant. At the watershed scale, streambanks contributed about 60% of the in-stream sediment. The second project involved the development of an index-based model for predicting the risk of herbicide transport in Young's Creek watershed, using soil, landscape, hydrologic, and herbicide properties. Application of a restrictive clay layer criterion was crucial for assessing risk between hydrologic pathways in claypan soils. The model correctly identified differences in risk for different soil types, distinguishing between claypan and alluvial soils, as well as among claypan soils. Among the four herbicides tested, the model was sensitive to differences in sorption intensity and dissipation half-life. The index model approach allows for watershed-scale quantification of herbicide transport risk over both time and space. It is potentially useful as a management tool for targeting best management practices to the most vulnerable areas within watersheds.eng
dc.description.bibrefIncludes bibliographical referenceseng
dc.format.extentix, 135 pageseng
dc.identifier.merlinb79480871eng
dc.identifier.oclc649692505eng
dc.identifier.urihttp://hdl.handle.net/10355/8113
dc.identifier.urihttps://doi.org/10.32469/10355/8113eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
dc.subject.lcshSedimentation and depositioneng
dc.subject.lcshRiparian areaseng
dc.subject.lcshWater qualityeng
dc.subject.lcshWater -- Pollutioneng
dc.subject.lcshSoil pollutioneng
dc.subject.lcshContaminated sedimentseng
dc.titleStreambank erosion and risk assessment of contaminant transport in Missouri watershedseng
dc.typeThesiseng
thesis.degree.disciplineSoil, environmental and atmospheric sciences (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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