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The effects of hypolimnetic oxygenation on the chemical, physical, and biological properties of a shallow drinking water reservoir

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dc.contributor.authorBrowne, Richard Gregoryen
dc.contributor.committeechairCarey, Cayelan C.en
dc.contributor.committeechairLittle, John C.en
dc.contributor.committeememberBoardman, Gregory D.en
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2013-09-21T08:00:20Zen
dc.date.available2013-09-21T08:00:20Zen
dc.date.issued2013-09-20en
dc.description.abstractHypolimnetic anoxia can result in higher internal phosphorus (P) loads from the sediments to the water column, thereby increasing nutrient availability, making preventing anoxia a major goal for lake managers to improve water quality. Side-stream saturation (SSS), a type of hypolimnetic oxygenation system, has been developed to maintain oxygenated conditions at the sediments by withdrawing oxygen-depleted water from the hypolimnion to an on-site facility and injecting it with oxygen under high pressure before returning it to the hypolimnion. While this technique has been studied in select water bodies, to date it has not been successfully deployed in a shallow lake. This study investigated the effects of an SSS system deployed at Falling Creek Reservoir, a shallow drinking water reservoir located in Vinton, Virginia, USA. Specifically, we examined the effects of the SSS system on several chemical, physical, and biological response variables to ascertain the short-term impacts of hypolimnetic oxygenation on reservoir water quality. We found that the SSS system was successful in increasing dissolved oxygen concentrations in the reservoir hypolimnion without weakening stratification, warming the sediments, or increasing turbidity; however, we were unable to detect any short-term effects of SSS operation on P concentrations, P loading, pH, chlorophyll a, or algal density. Interestingly, we also observed an increase in oxygen demand in response to SSS operation, which must be taken into account when deploying oxygenation systems in the future. Continued monitoring is necessary to more completely assess the long-term impacts of SSS operation on water quality at Falling Creek Reservoir.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:1596en
dc.identifier.urihttp://hdl.handle.net/10919/23823en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectOxygenationen
dc.subjecthypolimnionen
dc.subjectstratificationen
dc.subjectPhosphorusen
dc.subjecteutrophicationen
dc.titleThe effects of hypolimnetic oxygenation on the chemical, physical, and biological properties of a shallow drinking water reservoiren
dc.typeThesisen
thesis.degree.disciplineEnvironmental Sciences and Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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