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Posts tagged St. Lawrence River

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.

Lake Champlain South of the St. Lawrence River, Canada and USA

44.5N 73.3W

April 7th, 2010 Category: Lakes, Rivers

Canada - March 5th, 2010

Canada - March 5th, 2010

Lake Champlain (center) is a natural, freshwater lake in North America, located mainly within the borders of the United States (states of Vermont and New York) but partially situated across the Canada-US border in the Canadian province of Quebec. Here, part of it is frozen, causing the southern half to appear dark blue while the upper half appears bluish-grey.

Although it is smaller than the nearby Great Lakes, Lake Champlain is a large body of fresh water. Approximately 1,130 km2 (440 sq mi) in area, the lake is roughly 180 km (110 mi) long, and 19 km (12 mi) across at its widest point. The maximum depth is approximately 400 feet (120 m). The lake varies seasonally from about 95 to 100 ft (29 to 30 m) above mean sea level.

Lake Champlain is situated in the Lake Champlain Valley between the Green Mountains of Vermont and the Adirondack Mountains of New York, drained northward by the 106 miles (171 km) long Richelieu River into the St. Lawrence River (seen flowing across the upper portion of the image) at Sorel-Tracy, Quebec, northeast and downstream of Montreal.

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