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dc.contributor.advisorHogue, Terri S.
dc.contributor.authorSaxe, Samuel
dc.date.accessioned2016-02-15T22:38:56Z
dc.date.accessioned2022-02-03T12:57:22Z
dc.date.available2016-08-11T04:18:44Z
dc.date.available2022-02-03T12:57:22Z
dc.date.issued2016
dc.identifierT 7972
dc.identifier.urihttps://hdl.handle.net/11124/170033
dc.description2016 Spring.
dc.descriptionIncludes illustrations (some color), maps (some color).
dc.descriptionIncludes bibliographical references.
dc.description.abstractThis research investigates the impact of wildfires on watershed flow regimes throughout the western United States, specifically focusing on evaluation of fire events within specified subregions and determination of the impact of climate and geophysical variables in post-fire flow response. Fire events were collected through federal and state-level databases and streamflow data were collected from U.S. Geological Survey stream gages. 82 watersheds were identified with at least 10 years of continuous pre-fire daily streamflow records and 5 years of continuous post-fire daily flow records. For each watershed, percent changes in annual runoff ratio (RO), low-flows (LF), high-flows (HF), peak flows (PF), number of zero flow days (Nzeros), baseflow index (BFI), and Richards-Baker flashiness index (RB) were calculated from pre- to post-fire. Numerous independent variables were identified for each watershed and fire event, including topographic, vegetation, climate, burn severity, and soils data. The national watersheds were divided into five regions through k-means clustering and LASSO linear regression models were calculated for each region. Regression models were also produced for watersheds grouped by total area burned. The coefficient of determination (R2) was used to determine the accuracy of the resulting models. Model accuracy was highly variable, both by group and by response variable. Resulting coefficient values demonstrate that, of the watershed parameters applied in this study as explanatory variables, watershed area and burn severity parameters explain the greatest amount of the post-fire flow change variability. Burn area slope and soil erodibility factor (Kfact) also contribute significantly to post-fire response. Watershed area and Kfact are generally negatively correlated with response variables, while slope and percent moderate burn severity (BS_M) are positively correlated.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2016 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectfire
dc.subjectLASSO
dc.subjectwildfire
dc.titleLinear modeling and evaluation of controls on flow response in western post-fire watersheds
dc.typeText
dc.contributor.committeememberHay, Lauren E.
dc.contributor.committeememberMcCray, John E.
dcterms.embargo.terms2016-08-11
dcterms.embargo.expires2016-08-11
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineCivil and Environmental Engineering
thesis.degree.grantorColorado School of Mines
dc.rights.accessEmbargo Expires: 08/11/2016


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