Latest Tweets

Follow us on twitter

Make a Donation

$

Route Description

NAO News Feed

NAO main Feed

Water Quality of Lake Winnipeg: Paddling Through Pea Soup

Print PDF

Student Response  Worksheet (Lower)

Student Response Worksheet (Upper)

In last week's Cast YOUR Vote, students have voted for us to investigate the water quality of Lake Winnipeg. I have done some basic research. If you are curious about this topic, I encourage you to check out the additional resources at the end of this article in order to learn more!

P9070685

Dave and I just spent the past two weeks paddling on a very sick lake. Basically, Lake Winnipeg has too much phosphorous and nitrogen in it. The phosphorous and nitrogen come from farm fields and towns. Water running off farm fields contains fertilizers and manure from livestock (cows, chickens, or pigs). The water flowing past towns ends up with detergents and sewage in it. The Red River flows past many farms in the United States before it flows into Lake Winnipeg. The Winnipeg and Saskatchewan Rivers also flow past towns and farms. According to the Lake Winnipeg Foundation about 8,000 tonnes of phosphorous enter the lake, but only 2,500 tonnes flow out of the lake each year. That means a lot of phosphorous stays in the lake.P9070682

What happens to all that phosphorous? Algae need phosphorous and nitrogen to grow. So algae thrives in this lake full of excess phosphorous and nitrogen. This is why Dave and I spent most of our time paddling through water the color of pea soup. We witnessed a huge bloom of blue-green algae (also called cyanobacteria). This algae coating the surface of the water is more than smelly and unpleasant.

It can affect fish and plants in the lake in several ways. It can block the sunlight, preventing other plants from growing. When the algae dies and decays, it can reduce the amount of oxygen in the water. The algae can also produce toxins that are harmful to animals and humans. Dave and I did not want to drink the water in Lake Winnipeg because we learned that one of the toxins made by the algae can actually harm your liver. This toxin has been found in water samples taken throughout the lake.P9070662

The good news is that progress is being made to make Lake Winnipeg healthy again. It will probably take a very long time. The first step has been to study the lake and learn about its past and current state. Sources of the excess phosphorous and nitrogen have been found. Now, many people need to work together to reduce the amount of phosphorous and nitrogen that get washed into the lake.

Dave and I are wondering what we can do to help keep the lakes and rivers near you healthy. Do you have any ideas?

 

Additional Resources

 

June 2011 issue of Canadian Geographic:

http://www.canadiangeographic.ca/magazine/jun11/lake_winnipeg_algae.asp

 

Challenges facing Lake Winnipeg: http://www.lakewinnipegfoundation.org/lake-winnipeg/challenges/

 

Quick facts about Lake Winnipeg: http://www.gov.mb.ca/waterstewardship/water_quality/lake_winnipeg/facts.html

 

Lake Winnipeg Teacher Resources: http://www.edu.gov.mb.ca/k12/esd/resources.html

 

Happy Trails!

Amy

 

 

Fennel's Field Notes

I have spent the past few weeks enjoying my time, lying in the bottom of the canoe. We had a great routine. I would get in the canoe in the morning and nap. We would stop for lunch. I would run around for a couple minutes and then nap. Then I would get back in the canoe and nap until Dave and Amy found the spot to camp for the night.

Well, that routine has changed. Now that we are on the Winnipeg River, I have to work again! Dave and Amy paddle for a while and then we come to a dam. They strap my pack on my back and make me carry my dog food from the bottom of the dam to the top. Sometimes we have to portage around multiple dams in one day. I thought I was all done with the portaging thing weeks ago! Guess I was wrong. At least the day ends with my favorite part of the old routine – eating dinner!

 

Daily Data

Date, miles traveled, and animal sightings

9/9 - 27 miles 16 pelicans, 3 otter, 2 eagles

9/10 -18 miles 23 pelicans, 3 eagles, 1 beaver

9/11- 58 miles 18 pelicans, 2 moose, 2 otter, 1 eagle

9/12 - 6 miles 4 pelicans

9/13 - 0 miles We spent the day resting and didn’t see any animals.

9/14 - 15 miles 1 otter, 1 beaver, 3 eagles

9/15 - 16 miles 2 otter, 2 eagles, 1 pelican

blog comments powered by Disqus