Water Supply Outlook for Alberta
August 2008
Bow River Basin - Water Supply Forecasts |
As of August 1, 2008, natural runoff volumes forecast for the March to
September 2008 period are much above average into the Cascade
Reservoir and for the Highwood and Elbow Rivers, below to much below average
for the Bow River at Banff, and slightly above average for the Spray Lakes
Reservoir and for the Kananaskis River and the Bow
River at Calgary (Table 4a).
Current natural runoff volume forecasts range from 86 to 139% of average in
the basin. The current forecasted volume for the Bow River
at Calgary would rank 60th lowest in 91-years of record (1912-2001).
The first five months of the forecast period have been completed, with
March-July 2008 recorded natural runoff volumes ranging from 84 to 147% of
average. The Cascade Reservoir and the Elbow and Highwood
Rivers have so far recorded the thirteenth,
eleventh and eighteenth highest natural runoff volumes respectively in 91 years
of record. Other areas have recorded above average runoff except at Banff where it was
below to much below average, sixteenth lowest on record. Recorded volume data is preliminary and is
subject to change. The remaining volume forecast, for August to September 2008
and available in
Table 4b,
is above average for the Spray and Cascade Reservoirs and the Elbow
River, average for the Highwood and
Kananaskis Rivers and the Bow River at Calgary, and below average for the Bow River at Banff.
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