Water Supply Outlook for Alberta

May 2008

Table 6a - Water Supply Forecast as of May 1, 2008 - North Saskatchewan River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2008
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 2007 Volume as a % of Average
Lake Abraham Inflow 2,013,000 94 88-102 86 10/30* n/a***
Brazeau Reservoir Inflow 1,283,000 90 72-103 62 16/41** n/a***
North Saskatchewan River at Edmonton 5,003,000 85 73-101 67 28/91 n/a***

Note: Click on the site Location to see the Water Supply Forecast graphically


* Lake Abraham is compared to 30 years of data
** Brazeau Reservoir is compared to 41 years of data
*** The recorded March-September 2007 volumes will be published in the next Water Supply Outlook Report.

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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