Water Supply Outlook for Alberta
February 2003
Table 3 - Water Supply Forecast as of February 1, 2003 - 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 2002 Volume as a % of Average |
St. Mary River | 567,000* | 75 | 56-116 | 46 | 15/84 | 155 |
Belly River | 182,000 | 75 | 55-112 | 45 | 12/84 | 150 |
Waterton River | 456,000 | 69 | 52-104 | 41 | 14/84 | 143 |
Oldman River near Brocket | 693,000 | 63 | 41-102 | 36 | 13/84 | 147 |
Oldman River at Lethbridge | 1,964,000 | 66 | 45-106 | 38 | 16/84 | 151 |
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 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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