Water Supply Outlook for Alberta

May 2007

North Saskatchewan River Basin - Water Supply Forecasts

As of May 1, 2007, natural runoff volumes for the March to September 2007 period are forecast to be above average into the Bighorn and Brazeau Reservoirs, and at Edmonton, ranging from 106 to 109% of average (Table 7a). This represents a 3 to 7% increase since the April 1 forecasts. Current forecasted values for the March to September period for the North Saskatchewan River at Edmonton would rank 60th lowest in 91-years of record (1912-2001).

The first two months of the forecast period have been completed, with March-April 2007 recorded natural runoff volumes being above to much above average at Edmonton and the Bighorn Reservoir, and near average at the Brazeau Reservoir. Recorded volume data is preliminary, and is subject to change. The remaining volume forecast, which is the March to September 2007 forecast minus the recorded volume to date, is available in Table 7b. Natural runoff volumes for the May to September period are forecast to be above average.

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