Water Supply Outlook for Alberta

May 2007

Table 7a - Water Supply Forecast as of May 1, 2007 - North Saskatchewan River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2007
Locations Volume in dam3 Volume as a % of Average Probable Range as a % of Average Reasonable Minimum
as % of
Forecast Ranking (lowest to highest) Actual March-September 2006 Volume as a % of Average
Lake Abraham Inflow 2,355,000 109 105-114 100 25/30* 101
Brazeau Reservoir Inflow 1,525,000 106 86-129 79 24/41** 63
North Saskatchewan River at Edmonton 6,324,000 108 94-119 85 60/91 76
Note: Click on the site Location to see the Water Supply Forecast graphically


Click here to see the table containing the remaining forecast for the season along with the recorded volume to date

* Lake Abraham is compared to 30 years of data
** Brazeau Reservoir is compared to 41 years of data

Average is calculated for the March 1 to September 30 period from 1912 to 2001

NOTE: There is: a 50% chance that the actual natural flow will fall within the probable range given; a 25% chance that the actual flow will be less than the lower bound of the probable range given; and a 10% chance that the actual natural flow will be less than the reasonable minimum. Actual day to day streamflow conditions may vary throughout the season as a result of the effects of streamflow diversion and reservoir storage.

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