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Frozen, Wintry View of Circular Manicouagan Reservoir, Canada

January 28th, 2013 Category: Lakes

Canada – January 26th, 2013

The Manicouagan Reservoir is located north of the St. Lawrence River in Quebec. The reservoir was created by damming the arched Manicouagan and Mouchalagan Lakes with their associated rivers. The circular shape of the reservoir, highlighted by the white, frozen surface, and the surrounding landscape’s characteristics are a consequence of a meteoritic impact. A large island, ile Rene-Levasseur, fills the middle of the reservoir.

The Mouchalagane, Seignelay, and Themines rivers as well as the Petite Riviere Manicouagan and Hart Jaune River are the major inlets to this body of water. The Manicouagan River drains the reservoir. The water is oligotrophic, slightly acidic and very clear. This reservoir is monomictic and the thermocline develops during the summer at an average depth of 8 meters. According to the Biodiversity Institute of Ontario, mercury has been detected in whitefish, the main commercial fish species from the lake. This, however, is normal for reservoirs located in this region. The enhanced siltation that occurred when the reservoir was first dammed in the late 1960’s has settled and the water quality is generally considered to be pristine.

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