St-JacquesAndreichukSauchynEtAl2018

Référence

St-Jacques, J.-M., Andreichuk, Y., Sauchyn, D.J., Barrow, E. (2018) Projecting Canadian Prairie Runoff for 2041–2070 with North American Regional Climate Change Assessment Program (NARCCAP) Data. Journal of the American Water Resources Association, 54(3):660-675. (URL )

Résumé

Abstract The South Saskatchewan River Basin (SSRB) of Alberta, Canada, is semiarid and under severe water stress due to increasing human demands. We present the first examination of projected changes in SSRB runoff from a large set of North American Regional Climate Change Assessment Program regional climate models (RCMs) plus one Coordinated Regional Climate Downscaling Experiment RCM. We used six different runoff estimation methods: total surface and subsurface runoff (total runoff), surface runoff, and four estimations based on Budyko functions. Most RCM estimations showed substantial biases and distribution differences when compared to observed data; thus bias correction was necessary. Total runoff was the best of the six variables in modeling observed runoff for each of the four SSRB subbasins. Projected total runoff for 2041–2070 shows a geographic gradient in the SSRB, with possible drying in the southern Oldman River subbasin and possible increased runoff in the northernmost Red Deer River subbasin. A shift to an earlier spring peak in runoff and drier late summer, with a need for increased irrigation, should be expected. In a first examination of the important question of projected changes in interannual variability, we show increasing magnitude. This result further adds to adaptation challenges over the course of this century in this basin, which is already largely closed to further allocation.

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@ARTICLE { St-JacquesAndreichukSauchynEtAl2018,
    AUTHOR = { St-Jacques, J.-M. and Andreichuk, Y. and Sauchyn, D.J. and Barrow, E. },
    TITLE = { Projecting Canadian Prairie Runoff for 2041–2070 with North American Regional Climate Change Assessment Program (NARCCAP) Data },
    JOURNAL = { Journal of the American Water Resources Association },
    YEAR = { 2018 },
    VOLUME = { 54 },
    NUMBER = { 3 },
    PAGES = { 660-675 },
    ABSTRACT = { Abstract The South Saskatchewan River Basin (SSRB) of Alberta, Canada, is semiarid and under severe water stress due to increasing human demands. We present the first examination of projected changes in SSRB runoff from a large set of North American Regional Climate Change Assessment Program regional climate models (RCMs) plus one Coordinated Regional Climate Downscaling Experiment RCM. We used six different runoff estimation methods: total surface and subsurface runoff (total runoff), surface runoff, and four estimations based on Budyko functions. Most RCM estimations showed substantial biases and distribution differences when compared to observed data; thus bias correction was necessary. Total runoff was the best of the six variables in modeling observed runoff for each of the four SSRB subbasins. Projected total runoff for 2041–2070 shows a geographic gradient in the SSRB, with possible drying in the southern Oldman River subbasin and possible increased runoff in the northernmost Red Deer River subbasin. A shift to an earlier spring peak in runoff and drier late summer, with a need for increased irrigation, should be expected. In a first examination of the important question of projected changes in interannual variability, we show increasing magnitude. This result further adds to adaptation challenges over the course of this century in this basin, which is already largely closed to further allocation. },
    DOI = { 10.1111/1752-1688.12642 },
    EPRINT = { https://onlinelibrary.wiley.com/doi/pdf/10.1111/1752-1688.12642 },
    KEYWORDS = { aridity index, climate change, Coordinated Regional Climate Downscaling Experiment (CORDEX), North American Regional Climate Change Assessment Program (NARCCAP), runoff, South Saskatchewan River Basin },
    URL = { https://onlinelibrary.wiley.com/doi/abs/10.1111/1752-1688.12642 },
}

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