Water Supply Outlook for Alberta
February 2002
| Table 3 Water Supply Forecast as of February 1, 2002 - Oldman River Basin (Natural Flows) |
| Volume Forecast for March 1 to September 30 | ||||||
| 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) | Actual March-September 2001 Volume as a % of Average |
| St. Mary River | 586,000 | 77 | 55-99 | 40 | 16/84 | 53 |
| Belly River | 194,000 | 79 | 54-99 | 45 | 17/84 | 70 |
| Waterton River | 495,000 | 75 | 43-97 | 34 | 17/84 | 60 |
| Oldman River near Brocket | 698,000 | 63 | 42-94 | 32 | 13/84 | 47 |
| Oldman River at Lethbridge | 2,042,000 | 69 | 43-93 | 33 | 17/84 | 49 |
|
Average is calculated for the March 1 to September 30 period from 1912 to 1995 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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