Water Supply Outlook for Alberta

April 2008

Table 4b Water Supply Forecast as of April 1, 2008 - Bow River Basin (Natural Flows)

Volume Forecast for April 1 to September 30, 2008 Year to date
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 2008 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 949,000* 90 83-102 75 26/91 93** 26/91
Lake Minnewanka Inflow 161,000* 90 76-111 66 35/91 74** 20/91
Spray River near Banff 340,000* 95 84-115 76 37/91 80** 13/91
Kananaskis River 389,000* 98 87-117 78 38/91 95** 36/91
Bow River at Calgary 2,155,000* 92 81-109 73 31/91 88** 25/91
Elbow River 197,000* 94 74-131 62 50/91 94** 43/91
Highwood River 527,000* 87 69-127 54 39/91 67** 41/91

*NOTE: The forecast shown is the March to September 2006 forecast minus the recorded volume to date

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

** - Recorded 2006 natural volumes are preliminary and subject to change

Average is calculated for the period 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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