Water Supply Outlook for Alberta

June 2006

Table 5a - Water Supply Forecast as of June 1, 2006 - Bow River Basin (Natural Flows)

Volume Forecast for March 1 to September 30, 2006
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-September 2005 Volume as a % of Average
Bow River at Banff 1,009,000 94 89-104 86 33/91 90
Lake Minnewanka Inflow 173,000 93 86-113 82 39/91 129
Spray River near Banff 373,000 102 95-116 90 47/91 107
Kananaskis River 391,000 96 90-110 86 40/91 113
Bow River at Calgary 2,323,000 96 85-108 81 41/91 111
Elbow River 190,000 87 77-110 69 39/91 143
Highwood River 494,000 79 67-106 55 34/91 197

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

Click here to see the table containing the remaining forecast for the season along with the recorded volume to date

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