Water Supply Outlook for Alberta
May 2010
Water Supply Forecast as of May 1, 2010 - Bow River Basin
(Natural Flows) |
Volume Forecast for March 1 to September 30, 2010 | ||||||
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 2009 Volume as a % of Average |
Bow River at Banff | 880,000 | 82 | 74-89 | 69 | 10/91 | 72 |
Lake Minnewanka Inflow | 150,000 | 81 | 70-91 | 64 | 22/91 | 84 |
Spray River near Banff | 324,000 | 89 | 77-101 | 73 | 29/91 | 84 |
Kananaskis River | 366,000 | 90 | 84-100 | 76 | 30/91 | 83 |
Bow River at Calgary | 1,981,000 | 82 | 73-93 | 66 | 18/91 | 80 |
Elbow River | 177,000 | 81 | 70-94 | 62 | 33/91 | 86 |
Highwood River | 467,000 | 75 | 54-98 | 46 | 31/91 | 67 |
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