Water Supply Outlook for Alberta
August 2009
Water Supply Forecast as of August 1, 2009 - Bow River Basin
(Natural Flows) |
Volume Forecast for March 1 to September 30, 2009 | ||||||
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 2008 Volume as a % of Average |
Bow River at Banff | 787,000 | 73 | 71-77 | 71 | 3/91 | 85 |
Lake Minnewanka Inflow | 153,000 | 82 | 80-86 | 78 | 23/91 | 125 |
Spray River near Banff | 309,000 | 84 | 83-86 | 79 | 19/91 | 107 |
Kananaskis River | 312,000 | 76 | 75-79 | 73 | 11/91 | 107 |
Bow River at Calgary | 1,835,000 | 76 | 73-79 | 71 | 10/91 | 105 |
Elbow River | 180,000 | 82 | 80-86 | 79 | 36/91 | 139 |
Highwood River | 390,000 | 62 | 61-67 | 59 | 19/91 | 128 |
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 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