Water Supply Outlook for Alberta

May 2007

Table 5b Water Supply Forecast as of May 1, 2007 - Bow River Basin (Natural Flows)

Volume Forecast for May 1 to September 30, 2007 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-April 2007 Volume as a % of Average Ranking (lowest to highest)
Bow River at Banff 1,110,000* 108 102-126 94 67/91 114** 73/91
Lake Minnewanka Inflow 196,000* 115 94-141 86 69/91 102** 62/91
Spray River near Banff 371,000* 108 96-120 87 59/91 122** 79/91
Kananaskis River 411,000* 107 94-124 86 56/91 118** 75/91
Bow River at Calgary 2,458,000* 109 93-126 85 63/91 110** 68/91
Elbow River 192,000* 98 80-119 67 54/91 87** 35/91
Highwood River 548,000* 97 77-125 60 51/91 107** 64/91

*NOTE: The forecast shown is the March to September 2007 forecast minus the recorded volume to date

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


** - Recorded 2007 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