Water Supply Outlook for Alberta
April 2005
Table 3b - Water Supply Forecast as of April 1, 2005 - Oldman River Basin
(Natural Flows) |
Volume Forecast for April 1 to September 30, 2005 | 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 2005 Volume as a % of Average | Ranking (lowest to highest) | |
St. Mary River | 518,000** | 71 | 59-101 | 51 | 17/91 | 55*** | 22/91 | |
Belly River | 188,000* | 79 | 61-102 | 54 | 18/91 | 107*** | 66/91 | |
Waterton River | 434,000* | 74 | 60-100 | 50 | 18/91 | 86*** | 44/91 | |
Oldman River near Brocket | 752,000* | 71 | 55-103 | 50 | 21/91 | 111*** | 67/91 | |
Oldman River at Lethbridge | 1,958,000* | 68 | 53-99 | 46 | 18/91 | 69*** | 36/91 |
*NOTE: The forecast shown is the March to September 2005 forecast minus the recorded volume to date Click on the site Location to see the Water Supply Forecast graphically ** - This value is the natural volume and includes the U.S. share 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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