Water Supply Outlook for Alberta
June 2017
| Water Supply Forecast as of June 1, 2017 - Oldman River Basin
(Natural Flows) |
| Volume Forecast for June 1 to September 30, 2017 | Year to date | |||||||
| 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-May 2017 Volume as a % of Average | Ranking (lowest to highest) | |
| St. Mary River | 506,000** | 116 | 103-129 | 92 | 57/99 | 166*** | 94/99 | |
| Belly River | 175,000* | 116 | 106-125 | 98 | 67/99 | 130*** | 86/99 | |
| Waterton River | 379,000* | 110 | 99-121 | 89 | 53/99 | 107*** | 53/99 | |
| Oldman River near Brocket | 664,000* | 114 | 102-126 | 91 | 63/99 | 148*** | 84/99 | |
| Oldman River at Lethbridge | 2,108,000* | 117 | 103-130 | 91 | 69/99 | 133*** | 76/99 | |
|
*NOTE: The forecast shown is the March to September 2017 forecast minus the recorded volume to date ** - This value is the natural volume and includes the U.S. share*** - Recorded 2017 natural volumes are preliminary and subject to change Average is calculated for the March 1 to September 30 period 1981 to 2009 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
