Water Supply Outlook for Alberta
August 2013
| Water Supply Forecast as of August 1, 2013 - Oldman River Basin
(Natural Flows) |
| Volume Forecast for August 1 to September 30, 2013 | 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-July 2013 Volume as a % of Average | Ranking (lowest to highest) | |
| St. Mary River | 64,000** | 79 | 60-106 | 43 | 18/99 | 69*** | 9/99 | |
| Belly River | 31,000* | 93 | 79-113 | 67 | 38/99 | 107*** | 57/99 | |
| Waterton River | 50,000* | 91 | 76-121 | 62 | 45/99 | 93*** | 29/99 | |
| Oldman River near Brocket | 118,000* | 117 | 90-144 | 65 | 69/99 | 143*** | 80/99 | |
| Oldman River at Lethbridge | 328,000* | 104 | 89-119 | 75 | 59/99 | 118*** | 66/99 | |
|
*NOTE: The forecast shown is the March to September 2013 forecast minus the recorded volume to date ** - This value is the natural volume and includes the U.S. share*** - Recorded 2013 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
