Water Supply Outlook for Alberta
July 2002
Table 3a - Water Supply Forecast as of July 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 | 1,117,000* | 149 | 137-160 | 127 | 80/84 | 53 |
Belly River | 360,000 | 147 | 140-166 | 130 | 83/84 | 70 |
Waterton River | 966,000 | 146 | 134-170 | 124 | 80/84 | 60 |
Oldman River near Brocket | 1,688,000 | 153 | 143-160 | 134 | 76/84 | 47 |
Oldman River at Lethbridge | 4,276,000 | 144 | 129-162 | 120 | 77/84 | 49 |
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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