Water Supply Outlook for Alberta
July 2009
Water Supply Forecast as of July 1, 2009 - North Saskatchewan River Basin
(Natural Flows) |
Volume Forecast for July 1 to September 30, 2009 | Year to date | |||||||
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-June 2009 Volume as a % of Average | Ranking (lowest to highest) | |
Lake Abraham Inflow | 1,234,000* | 88 | 86-93 | 80 | 13/43** | 77**** | 2/30 | |
Brazeau Reservoir Inflow | 513,000* | 62 | 56-80 | 51 | 5/44*** | 57**** | 1/41 | |
North Saskatchewan River at Edmonton | 2,600,000* | 81 | 72-93 | 67 | 25/91 | 57**** | 5/91 |
*NOTE: The forecast shown is the March to September 2009 forecast minus the recorded volume to date  
**** Recorded 2009 natural flows 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. |
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