Water Supply Outlook for Alberta
March 2002
| Table 3 - Water Supply Forecast as of March 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) | Recorded March-September 2001 Volume as a % of Average |
| St. Mary River | 611,000 | 80 | 55-104 | 44 | 19/84 | 53 |
| Belly River | 201,000 | 82 | 56-107 | 47 | 20/84 | 70 |
| Waterton River | 524,000 | 79 | 46-99 | 37 | 20/84 | 60 |
| Oldman River near Brocket | 724,000 | 66 | 43-90 | 36 | 15/84 | 47 |
| Oldman River at Lethbridge | 2,111,000 | 71 | 45-94 | 37 | 17/84 | 49 |
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Note: Click on the site Location to see the Water Supply Forecast graphically 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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