Groundwater recharge in the Canadian Prairies: mechanisms, constraints, and rates

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dc.contributor.advisorHayashi, Masaki
dc.contributor.authorPavlovskii, Igor
dc.contributor.committeememberBentley, Laurence R.
dc.contributor.committeememberSjogren, Darren Boyd
dc.contributor.committeememberCey, Edwin E.
dc.contributor.committeememberIreson, Andrew M.
dc.date2019-06
dc.date.accessioned2019-01-15T16:05:45Z
dc.date.available2019-01-15T16:05:45Z
dc.date.issued2019-01-08
dc.description.abstractA combination of dry climate and extensive cover of low-permeability sediments reduces groundwater recharge in the Canadian Prairies to just a few percent of annual precipitation. Such recharge scarcity increases the importance of knowing recharge rates for adequate management of water resources and, simultaneously, complicates recharge rate evaluation. The present study addresses this problem by using a combination of surface conditions monitoring, geochemical methods, and remote sensing to identify recharge mechanisms and physiographic constraints on recharge, and to quantify recharge rates. The analysis of stable-isotopic data shows that groundwater recharge in the Canadian Prairies is dominated by the snow-melt-driven depression-focussed recharge pathway. The potential recharge through this pathway is limited by the volume of snow-melt that is retained within topographic depressions and, thus, is mostly constrained by just two factors: runoff generation and the available depression storage capacity. The latter is shown to be generally comparable in magnitude with typical runoff values and, thus, serves as a hard upper limit on recharge rates. The identified link between depression storage capacity values and specific types of surficial sediments allows to estimate limit on groundwater recharge rate based on the surficial geology maps. Unlike depression storage capacity, the limit on recharge rate associated with runoff volume varies over time and is sensitive to the atmospheric forcing with mid-winter melts, which are shown to be an important factor affecting both volume of snow-melt runoff and timing of groundwater recharge. The regional recharge rates are consistent with identified limiting factors and are estimated to be 8─14 mm per year in the parkland ecoregion and 3.5─6 mm per year in the grassland ecoregion.en_US
dc.identifier.citationPavlovskii, I. (2019). Groundwater recharge in the Canadian Prairies: mechanisms, constraints, and rates (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/35723
dc.identifier.urihttp://hdl.handle.net/1880/109460
dc.language.isoenen_US
dc.publisher.facultyScienceen_US
dc.publisher.institutionUniversity of Calgaryen
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.en_US
dc.subjectgroundwater rechargeen_US
dc.subjectDEMen_US
dc.subjectstable isotopes of wateren_US
dc.subjectrunoffen_US
dc.subjectsnowen_US
dc.subject.classificationGeologyen_US
dc.subject.classificationHydrologyen_US
dc.titleGroundwater recharge in the Canadian Prairies: mechanisms, constraints, and ratesen_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineGeoscienceen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrue
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