18O and 2H in streamflow across Canada

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dc.contributor.author Gibson, J. J.
dc.contributor.author Holmes, T.
dc.contributor.author Stadnyk, T. A.
dc.contributor.author Birks, S. J.
dc.contributor.author Eby, P.
dc.contributor.author Pietroniro, A.
dc.date.accessioned 2020-12-21T20:12:24Z
dc.date.available 2020-12-21T20:12:24Z
dc.date.copyright 2020 en_US
dc.date.issued 2020
dc.identifier.citation Gibson, 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.uri https://doi.org/10.1016/j.ejrh.2020.100754
dc.identifier.uri http://hdl.handle.net/1828/12472
dc.description.abstract Study 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.sponsorship Funding 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.language.iso en en_US
dc.publisher Journal of Hydrology: Regional Studies en_US
dc.subject Stable isotopes en_US
dc.subject Streamflow en_US
dc.subject Hydrology en_US
dc.subject Water sources en_US
dc.subject Water balance en_US
dc.subject Evaporation en_US
dc.subject Transpiration en_US
dc.title 18O and 2H in streamflow across Canada en_US
dc.type Article en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US

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