Water Supply Outlook for Alberta

July 2002

Table 4a Water Supply Forecast as of July 1, 2002 - Bow River Basin (Natural Flows)

Volume Forecast for March 1 to September 30
Locations Volume in dam3 Volume as a % of Average Probable Range as a % of Average Reasonable Minimum
as % of Average
Forecast Ranking (lowest to highest) Recorded March-September 2001 Volume as a % of Average
Bow River at Banff 994,000 93 86-100 82 28/84 72
Lake Minnewanka Inflow 193,000 102 96-121 90 47/84 67
Spray River near Banff 353,000 96 89-111 85 37/84 55
Kananaskis River 458,000 111 98-123 95 64/84 66
Bow River at Calgary 2,387,000 98 85-108 79 42/84 66
Elbow River 268,000 121 116-134 111 65/84 64
Highwood River 722,000 114 104-128 97 58/84 49

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

Average is calculated for the March 1 to September 30 period from 1912 to 1995

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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