Archive for Water Quality

Reducing how much nitrogen enters a lake has little impact on algal blooms.

WINNIPEG, Dec. 18, 2017-Lakes suffering from harmful algal blooms may not respond to reduced, or even discontinued, artificial nitrogen loading. Many blue-green algae responsible for algal blooms can fix atmospheric nitrogen dissolved in the water, and therefore water stewards should focus their efforts on removing phosphorus from lakes to combat algal blooms.

This is according to a recently published article in Springer’s Ecosystems journal, Biological Nitrogen Fixation Prevents the Response of a Eutrophic Lake to Reduced Loading of Nitrogen: Evidence from a 46-Year Whole-Lake Experiment.

 

Lake, campground in Riding Mountain National Park closed after discovery of zebra mussel DNA

CBC News, Dec. 12, 2017 – Parks Canada has closed a lake and campground in Riding Mountain National Park to the public after DNA evidence of zebra mussels was found in water samples taken this summer and fall.

In a news release, Parks Canada said Whirlpool Lake, on the eastern side of the southwestern Manitoba park, and its campground area are closed until further notice as a precaution.

Cost for North End sewage upgrades now pegged at $1.4B

CBC News, Dec 1, 2017 – Winnipeg’s most expensive construction project is now even more expensive.

Upgrades to the North End water-pollution control centre, the largest of the city’s three sewage treatment plants, are now expected to cost $1.4 billion, a rise of $600 million from the last estimate.

A report to city council’s finance committee said the higher cost is a result of a new conceptual design. While officials hinted in September the new estimate would be “more than $1 billion,” the report published Friday is the first to formalize the new project cost.

Neurotoxin found in some Lake Winnipeg algae

CBC News, November 29, 2017 – A new study found a neurotoxin linked to diseases including ALS and Alzheimer’s in blue-green algal blooms in Lake Winnipeg.