Water Supply Outlook for Alberta

August 2017

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

Volume Forecast for August 1 to September 30, 2017 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-July 2017 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 277,000* 108 99-116 90 56/99 124** 87/99
Lake Minnewanka Inflow 36,000* 91 76-108 63 39/99 113** 63/99
Spray River near Banff 76,000* 95 81-109 68 38/99 100** 47/99
Kananaskis River 85,000* 91 81-103 72 18/99 103** 49/99
Bow River at Calgary 573,000* 96 91-102 86 44/99 113** 66/99
Elbow River 38,000* 83 74-107 65 33/99 86** 34/99
Highwood River 51,000* 64 24-106 0 30/99 90** 38/99

*NOTE: The forecast shown is the March to September 2017 forecast minus the recorded volume to date

** - Recorded 2017 natural volumes are preliminary and subject to change

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

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 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