Water Supply Outlook for Alberta
June 2006
| Table 4a - Water Supply Forecast as of June 1, 2006 - Oldman 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 |
| St. Mary River | 691,000* | 93 | 82-112 | 77 | 36/91 | 77 |
| Belly River | 231,000 | 94 | 89-112 | 83 | 36/91 | 90 |
| Waterton River | 600,000 | 99 | 88-116 | 84 | 47/91 | 85 |
| Oldman River near Brocket | 1,048,000 | 96 | 83-117 | 78 | 46/91 | 132 |
| Oldman River at Lethbridge | 2,756,000 | 92 | 76-111 | 72 | 44/91 | 106 |
|
Note: Click on the site Location to see the Water Supply Forecast graphically * - This value is the natural volume and includes the U.S. share 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 Jun vary throughout the season as a result of the effects of streamflow diversion and reservoir storage. |
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