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dc.contributor.authorNelson, Michael Jamesen_US
dc.date.accessioned2014-03-14T21:30:02Z
dc.date.available2014-03-14T21:30:02Z
dc.date.issued2005-02-10en_US
dc.identifier.otheretd-02182005-111520en_US
dc.identifier.urihttp://hdl.handle.net/10919/41231
dc.description.abstractDirect transpiration rates and plant uptake of naphthalene by a hybrid poplar phytoremediation system located in Oneida, Tennessee were determined using hydrologic and groundwater concentration data. Water table recession analysis techniques were employed to determine direct transpiration rates from the saturated zone of the shallow, unconfined aquifer underlying the site. Direct transpiration rates varied over the growing season (late March to mid-October), with a maximum and mean daily direct transpiration of 0.0100 and 0.0048 feet/day, respectively. During 2004, the maximum direct transpiration rate was observed in May, and rates declined starting in June due to an associated decline in the water table. A technique was developed to estimate the volumetric transpiration rate of each tree based on the breast-height diameters and seasonally variable direct transpiration rates. During peak transpiration, the larger trees at the study site were estimated to directly transpire 4 to 13 gallons per day per tree. Plant uptake rates of naphthalene were estimated by superimposing spatial data (volumetric transpiration rates and naphthalene concentration in groundwater). The mass loss rate of naphthalene from the aquifer as a result of plant uptake during July 2004 was 335 mg/day which only represents 0.117% of the aqueous mass plume. Monthly groundwater profiles showed a decrease of the saturated thickness beneath the system of hybrid poplars between the dormant and active season. This study suggests direct transpiration rates and plant uptake of naphthalene are dependent on variables including climatic parameters, magnitude of the saturated thickness, and the concentration of naphthalene in groundwater.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartTHESIS.pdfen_US
dc.relation.haspartVITA.pdfen_US
dc.relation.haspartAppendixE.pdfen_US
dc.relation.haspartAppendixD.pdfen_US
dc.relation.haspartAppendixC.pdfen_US
dc.relation.haspartAppendixA.pdfen_US
dc.relation.haspartAppendixB.pdfen_US
dc.relation.haspartAppendixF.pdfen_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.subjectEvapotranspirationen_US
dc.subjectTranspirationen_US
dc.subjectHybrid Poplaren_US
dc.subjectNaphthaleneen_US
dc.subjectPlant Uptakeen_US
dc.subjectPhytoremediationen_US
dc.titleDirect Transpiration and Naphthalene Uptake Rates for a Hybrid Poplar Based Phytoremediation Systemen_US
dc.typeThesisen_US
dc.contributor.departmentEnvironmental 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.disciplineEnvironmental Planningen_US
dc.contributor.committeechairWiddowson, Mark A.en_US
dc.contributor.committeememberNovak, John T.en_US
dc.contributor.committeememberMarr, Linsey C.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02182005-111520/en_US
dc.date.sdate2005-02-18en_US
dc.date.rdate2007-02-23
dc.date.adate2005-02-23en_US


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