Provincial officials are hoping to reel in threats facing fish in the Bow and other southern Alberta rivers by imposing angling restrictions that start Saturday yyc
As of 2 p.m. and extending to midnight daily, angling will be forbidden in the Bow and other rivers in south and southwestern parts of the province to give a break to fish stressed by low water levels that have led to elevated temperatures.
The decision was made after recent hot weather drove the temperature of the Bow River to 20 C for five consecutive days. The threshold needed to make such a decision is reached when water temperatures exceed 20 C for three or more consecutive days, and when the flows in the Bow are below the 25th water flow percentile for four or more days.Article content
“We’re seeing more frequent dry and warm conditions . . . over the last decade or so, we’re seeing these conditions more,” said Christensen, who noted the Bow River was completely closed to angling for two weeks in 2015 due to similar conditions.Article content The rapid retreat of Rocky Mountain glaciers upstream from Calgary, which are particularly vital in bolstering late summer and autumn water supplies, is expected to continue or quicken as the impacts of human-induced climate change mount, say scientists.
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