Water Supply Outlook for Alberta
April 2002
Table 3a - Water Supply Forecast as of April 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 | 662,000* | 88 | 59-108 | 52 | 29/84 | 53 |
Belly River | 216,000 | 88 | 56-110 | 51 | 26/84 | 70 |
Waterton River | 559,000 | 85 | 50-99 | 43 | 24/84 | 60 |
Oldman River near Brocket | 816,000 | 74 | 50-110 | 40 | 21/84 | 47 |
Oldman River at Lethbridge | 2,332,000 | 78 | 49-106 | 42 | 22/84 | 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. |
For technical enquires about this web page please contact Alberta Environment - Environmental Management Water Management Operations Branch at AENV-WebWS@gov.ab.ca