Water Supply Outlook for Alberta
August 2002
Table 3a - Water Supply Forecast as of August 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 | 1,182,000* | 157 | 153-163 | 151 | 83/84 | 53 |
Belly River | 384,000 | 157 | 153-162 | 148 | 83/84 | 70 |
Waterton River | 977,000 | 148 | 144-152 | 141 | 81/84 | 60 |
Oldman River near Brocket | 1,622,000 | 147 | 143-151 | 142 | 75/84 | 47 |
Oldman River at Lethbridge | 4,311,000 | 145 | 141-155 | 139 | 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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