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Lakes of Southern Manitoba, Canada

53.2N 97.9W

December 10th, 2009 Category: Lakes

Canada - November 18th, 2009

Canada - November 18th, 2009

Large lakes colored golden brown and green by sediments are visible in southern Manitoba, Canada. The largest visible here is Lake Winnipeg, with an area of 24,514 km² (9,465 sq mi). Three smaller lakes lie parallel to its western shores (from top to bottom): Cedar Lake, Lake Winnipegosis and Lake Manitoba.

The Canada-USA border lies south of these lakes, running approximately through the center of this image in a horizontal line. To the south is the US state of North Dakota. Lake Sakakawea, near the bottom edge, stands out amidst the golden brown terrain of the state. It is a reservoir in the Missouri River basin.

Averaging between 2 and 3 miles (3–5 km) in width and 14 miles (21 km) wide at its widest point, the Van Hook Arm, it is the third largest man-made lake in the United States, after Lake Mead and Lake Powell.

Lake Sakakawea, North Dakota

April 25th, 2009 Category: Lakes

USA - April 13th, 2009

USA - April 13th, 2009

Lake Sakakawea, upper left, is a reservoir in the Missouri River basin in central North Dakota. It is the third largest man-made lake in the United States, after Lake Mead and Lake Powell. Here it is covered with snow and ice, thus appearing white.

It is located about 80 km (50 mi) from Bismarck, North Dakota; the distance by the river is about 120 km (75 mi). The lake averages between 2 and 3 miles (3–5 km) in width and is 14 miles (21 km) wide at its widest point (Van Hook arm). Lake Sakakawea marks the maximum southwest extent of glaciation during the ice age.

The reservoir was created with the completion of Garrison Dam in 1956, the second (and largest) of six main-stem dams on the Missouri River built and managed by the U.S. Army Corps of Engineers for flood control, hydroelectric power, navigation and irrigation.

The creation of the lake displaced members of the Fort Berthold Indian Reservation from the cities of Van Hook and (Old) Sanish, forcing the creation of New Town. A third reservation town, Elbowoods was also lost to the lake.

Meanderings of the Missouri River through North Dakota – April 3rd, 2009

April 3rd, 2009 Category: Image of the day, Rivers

Missouri River, North Dakota, USA - March 28th, 2009

Missouri River, North Dakota, USA - March 28th, 2009

While the eastern part of North Dakota, USA, suffers from the flooding of the Red River, here, the Missouri River meanders across the state’s central farmlands of central. It is covered with snow and ice to the North, where temperatures are lower and a snow storm had recently blanketed the area with white powder.

To the South-east, with the exception of some ice on one bend, its waters are laden with brownish-green sediments. The wider section towards the middle is actually the Lake Oahe, the 4th largest man-made reservoir in the country.

The Missouri River is a tributary of the Mississippi River, and the longest river in the United States of America. The Missouri begins at the confluence of the Madison, Jefferson, and Gallatin rivers in Montana, and flows through its valley south and east into the Mississippi north of St. Louis, Missouri.

At 2,540 miles (4,090 km) in length, it drains about one-sixth of the North American continent. The Missouri in its original natural meandering state was the longest river in North America. Nearly 72 miles (116 km) of the river have been cut off in channeling and so it is now comparable in length to the Mississippi River.

Red River: North Dakota Sees Record Flood Levels

April 1st, 2009 Category: Floods

North Dakota and Minnesota, USA - March 29th, 2009

North Dakota and Minnesota, USA - March 29th, 2009

The states of North Dakota (center left), South Dakota (bottom left) and Minnesota (right) in the USA as well as the southern part of Canada’s Manitoba (top left) and Ontario (top right) provinces are all visible here. Lake Superior shows its southwestern tip in the upper right corner.

Recently, North Dakota, Minnesota and Manitoba have all been affected by high water levels in the Red River. The Fargo-Moorhead area in North Dakota saw record flood levels.

The flood is a result of saturated and frozen ground, Spring snowmelt exacerbated by additional rain and snow storms, and virtually flat terrain.

Unlike the vast majority of rivers in the United States, the Red River flows northward, which means melting snow and river ice, as well as runoff from its tributaries, often create ice dams, which cause the river to overflow. The valley is essentially flat, leading to overland flooding, with no high ground on which to take refuge.

The river crest was originally predicted to reach a level of near 43 feet (13 m) at Fargo by March 29, although the river in fact crested at 40.82 feet (12.44 m) at 12:15 a.m. March 28, and started a slow decline. The river continued to rise to the north as the crest moved downstream.

Other climate-related factors also influenced the flooding: ground which was already saturated when it froze at the onset of winter, melting snow which could not be absorbed by the frozen ground, and additional precipitation from a rain storm on March 22 and a later snowstorm.

A low-pressure area caused the rain storm on March 22 and by March 25 a total of 15 to 25 cm (6 to 10 inches) fell in the Winnipeg area, and 20 to 30 cm (8 to 12 inches) in southern Manitoba. In northeastern North Dakota and northwestern Minnesota, around 8 inches of snow accumulated from the same storm.

Lake Oahe and Missouri River, South Dakota, USA

January 6th, 2009 Category: Fires, Rivers

Lake Oahe and Missouri River, South Dakota, USA - November 27th, 2008

Lake Oahe and Missouri River, South Dakota, USA - November 27th, 2008

The river snaking its way across this image of part of South Dakota, USA is the Missouri River. The lower segments reveal some sediments, while the wider navy blue parts actually constitute Lake Oahe.

The rest of the area seems primarily used for agriculture. To the left, we can see a white patch of snow covering some fields.

Lake Oahe is the 4th largest man-made reservoir in the United States. It stretches 231 miles (372 km) up the course of the Missouri to Bismarck, North Dakota.

Lake Oahe was created by the Oahe Dam, a large man-made dam along the Missouri River, just north of Pierre, South Dakota in the United States.

The dam’s powerplant provides electricity for much of the north-central United States. The project provides flood control, electric power, irrigation, and navigation benefits, estimated by the Corps of Engineers at $150,000,000 per year.

However, the construment of the dam also caused much displacement of the American Indian population, as the Cheyenne River Indian Reservation and Standing Rock Reservation lost huge parcels of land, including much of their prime agricultural acreage.

source Wikipedia

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