Water Supply Outlook for Alberta
June 2003
Table 3a - Water Supply Forecast as of June 1, 2003 - Oldman River Basin
(Natural Flows) |
Volume Forecast for March 1 to September 30, 2003 | ||||||
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 | 573,000* | 76 | 65-95 | 63 | 15/85 | 152 |
Belly River | 197,000 | 80 | 68-105 | 65 | 18/85 | 150 |
Waterton River | 497,000 | 75 | 67-102 | 63 | 16/85 | 143 |
Oldman River near Brocket | 891,000 | 81 | 70-100 | 62 | 26/85 | 145 |
Oldman River at Lethbridge | 2,233,000 | 75 | 62-103 | 57 | 20/85 | 149 |
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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