18O and 2H in streamflow across Canada

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dc.contributor.authorGibson, J. J.
dc.contributor.authorHolmes, T.
dc.contributor.authorStadnyk, T. A.
dc.contributor.authorBirks, S. J.
dc.contributor.authorEby, P.
dc.contributor.authorPietroniro, A.
dc.date.accessioned2020-12-21T20:12:24Z
dc.date.available2020-12-21T20:12:24Z
dc.date.copyright2020en_US
dc.date.issued2020
dc.description.abstractStudy region Water samples for isotopic analysis were collected during 2013–2019 at 331 gauging stations across Canada in representative watersheds ranging from the Atlantic to the Pacific to the Arctic Oceans. Drainage area coverage of the network included 56 % of Canada’s landmass (9,984,670 km2) and was representative of 91 % of Canada’s annual water yield. Study focus Baseline data, including 4603 18O and 2H analyses, are described to assess potential for process studies and predictive model calibration. New hydrological insights for the region While similar patterns are noted between isotopes in streamflow and precipitation across Canada, systematic evaporative enrichment in streamflow occurs in lake- and wetland-rich areas, and systematic depletion occurs in some mountainous and/or cold-regions watersheds. The latter are attributed to uncertainty in precipitation isotope records, glacial melt and/or permafrost thaw. In δ18O-δ2H space, streamflow characteristically plotted on or below the Canadian Meteoric Water Line (CMWL) (δ2H = 8∙δ18O+8.5) along imbricated Regional River Lines (RRL) displaying a range of regression slopes (4.34–9.31) and intercepts (-54 to +24), reflecting regional variations in isotopic composition of input sources, evaporative enrichment, and tributary mixing. We define the Canadian Rivers Line (CRL) based on the linear regression of flow-weighted mean values of station data (δ2H = 7.89∙δ18O+0.45, r2 = 0.962; n = 161).en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipFunding and in-kind support for analytical costs and logistics was provided by Environment and Climate Change Canada via a Grants and Contributions Agreement and by InnoTech Alberta via an Internal Investment Grant.en_US
dc.identifier.citationGibson, J. J., Holmes, T., Stadnyk, T. A., Birks, S. J., Eby, P., & Pietroniro, A. (2020). 18O and 2H in streamflow across Canada. Journal of Hydrology: Regional Studies, 32, 1-22. https://doi.org/10.1016/j.ejrh.2020.100754.en_US
dc.identifier.urihttps://doi.org/10.1016/j.ejrh.2020.100754
dc.identifier.urihttp://hdl.handle.net/1828/12472
dc.language.isoenen_US
dc.publisherJournal of Hydrology: Regional Studiesen_US
dc.subjectStable isotopesen_US
dc.subjectStreamflowen_US
dc.subjectHydrologyen_US
dc.subjectWater sourcesen_US
dc.subjectWater balanceen_US
dc.subjectEvaporationen_US
dc.subjectTranspirationen_US
dc.title18O and 2H in streamflow across Canadaen_US
dc.typeArticleen_US

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