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Articles

ESTIMATING THE POTENTIAL IMPACT OF CLIMATE CHANGE ON STREAMFLOW IN THE OLDMAN RIVER BASIN, ALBERTA: AN ANALOGUE APPROACH

Pages 141-155 | Published online: 23 Jan 2013
 

Abstract

Historical records of temperature and precipitation at three stations in the Upper Oldman drainage basis in southwestern Alberta were searched for values which match those forecast for the basin by three General Circulation models, the Goddard Institute of Space Science (GISS), the Geophysical Fluid Dynamics Laboratory (GFDL) and Oregon State University (OSU). An increase of 1 °C in mean annual temperature over a five year period combined with normal precipitation reduced streamflow by 15% annually. A 1% increase in precipitation combined with normal temperature increased streamflow by 1%.

Des records historiques conçernants la température et la précipitation à trois postes dans la région supérieure du bassin Oldman au sud-oust d’Albert ont été révisés afin de trouver des valeurs qui correspondent à ceux qui sont predits par trois modelés de circulation générale : Goddard Institute of Space Science (GISS), Geophysical Fluid Dynamics Laboratory (GDKL), et Oregon State University (OSU). Une augmentation de 1 °C dans la température moyenne annuelle pendant une période de cinq ans accompagnée par des précipitations normales a réduit le coulée de l’eau par 15% chaque année. Une augmentation de 1% dans la précipitation accompagnée par des température normales a augmenté le coulee de l’eau par 1%.

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