Water Supply Outlook for Alberta
August 2003
Table 3a - Water Supply Forecast as of August 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 | 575,000* | 77 | 76-81 | 74 | 15/85 | 152 |
Belly River | 206,000 | 84 | 83.5-88 | 83 | 20/85 | 150 |
Waterton River | 435,000 | 66 | 65-69 | 64 | 12/85 | 143 |
Oldman River near Brocket | 826,000 | 75 | 74.5-79 | 73.5 | 21/85 | 145 |
Oldman River at Lethbridge | 2,128,000 | 72 | 69-78 | 68 | 18/85 | 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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