Water Supply Outlook for Alberta

June 2004

Table 4b Water Supply Forecast as of June 1, 2004 - Bow River Basin (Natural Flows)

Volume Forecast for June 1 to September 30, 2004 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-May 2004 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 783,000* 88 82-104 73 25/91 70** 16/91
Lake Minnewanka Inflow 121,000* 83 72-116 67 31/91 72** 16/91
Spray River near Banff 240,000* 83 71-102 70 21/91 85** 33/91
Kananaskis River 290,000* 88 73-114 68 30/91 77** 25/91
Bow River at Calgary 1,691,000* 87 72-107 64 27/91 76** 14/91
Elbow River 126,000* 80 61-119 54 35/91 70** 21/91
Highwood River 318,000* 76 47-131 41 33/91 56** 17/91

*NOTE: The forecast shown is the March to September 2004 forecast minus the recorded volume to date

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


** - Recorded 2004 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.

For technical enquires about this web page please contact Alberta Environment - Environmental Management Water Management Operations Branch at AENV-WebWS@gov.ab.ca