Water Supply Outlook for Alberta

June 2017

Water Supply Forecast as of June 1, 2017 - Bow River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2017
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 2016 Volume as a % of Average
Bow River at Banff 1,237,000 123 118-127 114 85/99 88
Lake Minnewanka Inflow 212,000 120 111-131 104 73/99 74
Spray River near Banff 381,000 106 100-112 95 54/99 78
Kananaskis River 409,000 107 101-116 96 54/99 81
Bow River at Calgary 2,632,000 114 111-118 108 72/99 80
Elbow River 209,000 103 94-121 86 56/99 72
Highwood River 667,000 120 103-146 88 64/99 55


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