water column

Canada's lakes are becoming less blue — but that could be good for fish

Canada's lakes are becoming less blue — but that could be good for fish

If you drive the Icefields Parkway through the Canadian Rockies, you'll pass multiple turquoise-coloured lakes that are popular with tourists for taking photos. The lakes get their iconic colour from rock flour, which is similar in appearance to baker's flour used for making bread. Rock flour is made from glaciers grinding rocks into powder, which can take thousands of years. 

Mount Polley tailings pond breach still affecting aquatic life in Quesnel River

Mount Polley tailings pond breach still affecting aquatic life in Quesnel River

Every winter since the tailings pond breach at the Mount Polley mine in 2014, copper-laden sediment from the bottom of Quesnel Lake has been re-suspended in the water column and has flowed into the Quesnel River affecting aquatic life in the watershed, according to a new paper by UNBC researchers Phil Owens and Ellen Petticrew. The tailings facility at the Mount Polley copper and gold mine failed on Aug. 4, 2014, sending 25 million cubic metres of solids and water from the mine site into the local environment and researchers have spent the past eight years monitoring the environment after the breach.