Water Supply Outlook for Alberta

July 2006

Table 4b Water Supply Forecast as of July 1, 2006 - Bow River Basin (Natural Flows)

Volume Forecast for July 1 to September 30, 2006 Year to date
Locations Volume in dam3 Volume as a
% of Average 		Probable Range as a % of Average Reasonable Minimum
as % of Average 		Forecast Ranking (lowest to highest) Recorded March-June 2006 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 524,000* 93 82-108 74 36/91 94** 39/91
Lake Minnewanka Inflow 78,100* 89 79-122 71 38/91 90** 40/91
Spray River near Banff 179,000* 102 93-129 81 56/91 122** 80/91
Kananaskis River 196,000* 96 89-120 78 41 97** 44/91
Bow River at Calgary 1,167,000* 95 81-115 71 45/91 99** 44/91
Elbow River 77,800* 86 73-118 65 41/91 86** 41/91
Highwood River 142,000* 72 54-113 45 38/91 78** 32/91

*NOTE: The forecast shown is the March to September 2006 forecast minus the recorded volume to date

Note: Click on the site Location to see the Water Supply Forecast graphically

** - Recorded 2004 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