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dc.contributor.authorLeitch, Katherine McArthuren_US
dc.date.accessioned2011-08-06T16:06:08Z
dc.date.available2011-08-06T16:06:08Z
dc.date.issued2004-06-04en_US
dc.identifier.otheretd-72098-1274en_US
dc.identifier.urihttp://hdl.handle.net/10919/10078
dc.description.abstractQuantification of total phosphorus (TP) loads entering a lake or reservoir is important because phosphorus is most often the limiting nutrient in terms of algae growth, thus phosphorus can control the extent of eutrophication. Four methods for assessing the annual tributary phosphorus loads to two different Virginia reservoirs were analyzed, three methods that use tributary monitoring program data and one that uses land-use and rainfall data. In this project, one tributary has been extensively monitored for many years and served as a control on which the other methods were tested. The key difference between this research and previous studies is the inclusion of flow-weighted composite storm sampling instead of simple grab sample analyses of storm flow. Three of the methods employed flow stratification, and the impact of the base flow separation point was examined. It was found that the Regression Method developed in this research was the least sensitive to the base flow separation point, which is a valuable attribute because a wrong choice will not significantly affect the estimate. The Monte Carlo Method was found to underestimate the TP loads. The amount of rainfall impacted the accuracy of the methods, with more error occurring in a year with lower precipitation.en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartTableCon.pdfen_US
dc.relation.haspartLitrev.pdfen_US
dc.relation.haspartManuscript.pdfen_US
dc.relation.haspartAAppendix.pdfen_US
dc.relation.haspartBappendix.pdfen_US
dc.relation.haspartCAppendix.pdfen_US
dc.relation.haspartDappendix.pdfen_US
dc.relation.haspartVITA7.PDFen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjecttributary load estimationen_US
dc.subjectwater qualityen_US
dc.subjectnonpoint source pollutionen_US
dc.subjectphosphorusen_US
dc.titleEstimating Tributary Phosphorus Loads Using Flow-Weighted Composite Storm Samplingen_US
dc.typeThesisen_US
dc.contributor.departmentCivil and Environmental Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCivil and Environmental Engineeringen_US
dc.contributor.committeechairHoehn, Robert C.en_US
dc.contributor.committeememberGrizzard, Thomas J.en_US
dc.contributor.committeememberGallagher, Daniel L.en_US
dc.contributor.committeememberGandour, Richard D.en_US
dc.contributor.committeememberTaylor, Larry T.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-72098-1274en_US
dc.date.sdate1998-08-17en_US
dc.date.rdate1999-08-21
dc.date.adate1998-08-21en_US


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