Water Supply Outlook for Alberta

April 2009

Water Supply Forecast as of April 1, 2009 - Bow River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2009
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-September 2008 Volume as a % of Average
Bow River at Banff 973,000 91 83-98 78 27/91 85
Lake Minnewanka Inflow 158,000 85 71-104 63 30/91 125
Spray River near Banff 335,000 91 80-105 72 32/91 107
Kananaskis River 375,000 92 81-104 72 33/91 107
Bow River at Calgary 2,158,000 89 78-101 72 28/91 105
Elbow River 175,000 80 66-100 59 33/91 139
Highwood River 469,000 75 51-100 42 31/91 128


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 potential 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