Water Supply Outlook for Alberta

June 2015

Water Supply Forecast as of June 1, 2015 - Bow River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2015
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 2014 Volume as a % of Average
Bow River at Banff 905,000 90 86-94 83 15/99 101
Lake Minnewanka Inflow 144,000 81 73-93 65 17/99 110
Spray River near Banff 318,000 88 83-94 77 26/99 88
Kananaskis River 342,000 89 84-95 79 25/99 116
Bow River at Calgary 2,027,000 88 84-91 81 23/99 144
Elbow River 175,000 87 77-104 69 35/99 144
Highwood River 485,000 87 70-113 55 35/99 156


Average is calculated for the March 1 to September 30 period from 1981 to 2009

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