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Possible impacts of climatic warming scenarios on water resources in the Saskatchewan River Sub-basin, Canada

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Abstract

Regional scale studies of the impacts of global warming scenarios provide a useful mechanism for identifying potential regional sensitivities, data gaps and research needs, and for raising awareness of the global warming issue at the regional level. Thus, a pilot study of water resources in the Saskatchewan River Sub-basin was undertaken in order to provide first-cut estimates of impacts in this region, and to identify future research needs. Thirty scenarios were constructed, using two hypothetical growth rates for irrigation, five scenarios based on outputs from General Circulation Models (GCMs), and ten hypothetical warming scenarios. During the course of this study, a number of methodological questions were raised, including the representativeness of data points, interpolation of observed and scenario data, and the quantification of uncertainty.

Results indicated decreases in summer soil moisture and increases in irrigation demand, but no consensus on changes in runoff or annual net basin supply, primarily due to differences in the GCM-based scenario output at the Rocky Mountains, the major source region for runoff. There were a number of recommendations for follow-up research and monitoring.

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  1. Canadian Climate Centre, Atmospheric Environment Service, M3H 5T4, Downsview, Ontario, Canada

    Stewart J. Cohen

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Cohen, S.J. Possible impacts of climatic warming scenarios on water resources in the Saskatchewan River Sub-basin, Canada. Climatic Change 19, 291–317 (1991). https://doi.org/10.1007/BF00140168

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  • DOI: https://doi.org/10.1007/BF00140168

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