Evaluation of nitrate in groundwater under long-term manure application

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dc.contributor.advisorCey, Edwin E.
dc.contributor.authorKyte, Emily
dc.contributor.committeememberRyan, M. Cathryn
dc.contributor.committeememberTutolo, Benjamin M.
dc.date2018-11
dc.date.accessioned2018-09-04T14:35:09Z
dc.date.available2018-09-04T14:35:09Z
dc.date.issued2018-08-27
dc.description.abstractOver-application of manure to agricultural fields can contaminate groundwater resources through the leaching of nitrogen below the root zone. The goal of this study was to evaluate the factors affecting the spatial and temporal distribution of nitrate in groundwater following 44 years of manure application. The sampling of 26 wells over an 18-month period revealed that nitrate concentrations ranged from <10 mg-N/L to 1350 mg-N/L and isotopic analysis of 15N-NO3 and 18O-NO3 showed that denitrification occurred in 16 well locations. Generalized additive mixed models (GAMM’s) confirmed that cumulative manure loading had the largest control on the current spatial distribution of groundwater nitrate, while a decrease in groundwater nitrate with sampling date and an increase with dissolved organic carbon (DOC) and were also significant relationships. Evidence for the leaching of nitrogen into groundwater was found in well locations where manure was applied within the past 16 years. The groundwater nitrate trends observed in this long-term study suggest that historical management practices will affect groundwater quality for many decades to come.en_US
dc.identifier.citationKyte, E. (2018). Evaluation of nitrate in groundwater under long-term manure application (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/32867en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/32867
dc.identifier.urihttp://hdl.handle.net/1880/107689
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultyScience
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectNitrate
dc.subjectGroundwater
dc.subjectManure application
dc.subjectLong-term study
dc.subjectHydrogeology
dc.subjectStable isotopes
dc.subjectRecharge
dc.subjectDenitrification
dc.subject.classificationGeologyen_US
dc.subject.classificationHydrologyen_US
dc.titleEvaluation of nitrate in groundwater under long-term manure application
dc.typemaster thesis
thesis.degree.disciplineGeoscience
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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