Water Supply Outlook for Alberta

April 2010

Water Supply Forecast as of April 1, 2010 - Bow River Basin (Natural Flows)

Volume Forecast for April 1 to September 30, 2010 Year to date
Locations Volume in dam3 Volume as a
% of Average 		Probable Range as a % of Average Potential Minimum
as % of Average 		Forecast Ranking (lowest to highest) Recorded March 2010 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 861,000* 82 73-91 67 11/91 95** 32/91
Lake Minnewanka Inflow 149,000* 83 70-93 61 26/91 62** 22/91
Spray River near Banff 310,000* 87 73-100 68 28/91 86** 21/91
Kananaskis River 357,000* 90 83-101 73 30/91 73** 11/91
Bow River at Calgary 1,932,000* 82 72-95 65 19/91 84** 19/91
Elbow River 169,000* 81 66-94 57 33/91 107** 69/91
Highwood River 431,000* 71 49-101 44 29/91 111** 68/91

*NOTE: The forecast shown is the March to September 2010 forecast minus the recorded volume to date

** - Recorded 2010 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