Prone to flooding
Four factors make the Red River Valley prone to flooding (the factors are related to physical geography):
Synchrony of Discharge with Spring Thaw: The Red River flows northward. The spring thaw also proceeds gradually northward. As a result, runoff from the southern portion of the valley gradually joins the fresh melt-off waters from northerly areas along the Red River. In the northern part of the Valley, this can result in devastating floods if the effects occur at the same time.
Ice Jams: These are also produced because of the northward-flowing river system. Ice is moving from the southern Valley and freshly-broken ice is moving from the central and northern Valley. These two meet steadily; as a result, ice concentration in this system builds and causes delay of water flow.
Glacial Lake Plain: The floor of Glacial Lake Agassiz is one of the flattest expanses of land in the world. Here, the Red River has cut a shallow, winding valley. As a result of this, when the river floods on this plain, a devastating event can occur. The areal coverage of the waters can become dramatic. Being approximately 9,300 years old, the Red River has not yet carved a large valley-floodplain systems on the surrounding geography. Thus, the large lake plain becomes the floodplain to the Red River. The Lake Agassiz glacial lake plain extends around 100 miles from east to west, end to end, between northeastern North Dakota and northwestern Minnesota.
Decrease in Gradient Downstream: The gradient, or slope, of the Red River averages 5 inches per mile of length. In the region of Drayton-Pembina, the gradient is only 1.5 inches per mile. The water tends to pool in this area during flood season. The region can become a massive, shallow lake. [6]
Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the dominant vegetation type. Temperate grassland regions include the Pampas of Argentina, Brazil and Uruguay, and the steppe of Ukraine, Russia, and Kazakhstan. Lands typically referred to as "prairie" tend to be in North America. The term encompasses the lower and mid-latitude of the area referred to as the Interior Plains of Canada, the United States, and Mexico. It includes all of the Great Plains as well as the wetter, hillier land to the east. From west to east, generally the drier expanse of shortgrass prairie gives way to mixed grass prairie and ultimately the richer soils of the tallgrass prairie.
Pembina County is a county in the U.S. state of North Dakota. At the 2020 census its population was 6,844. The county seat is Cavalier.
Kittson County is a county in the northwestern corner of the U.S. state of Minnesota along the Canada–US border, south of the Canadian province of Manitoba. As of the 2020 census, the population was 4,207. Its county seat is Hallock.
Badger Township is a township in Polk County, Minnesota, United States. It is part of the Grand Forks-ND-MN Metropolitan Statistical Area. Under the United States Public Land Survey System it is a survey township identified as Township 149 North, Range 42 West, Fifth Principal Meridian. The population was 166 at the 2000 census.
Pembina is a city in Pembina County, North Dakota, United States. The population was 512 at the 2020 census. Pembina is located 2 miles (3.2 km) south of the Canada–US border. Interstate 29 passes on the western side of Pembina, leading north to the Canada–US border at Emerson, Manitoba and south to the cities of Grand Forks and Fargo. The Pembina–Emerson Border Crossing is the busiest between Surrey–Blaine, and Windsor–Detroit, and the fifth busiest along the Canada-United States border. It is one of three 24-hour ports of entry in North Dakota, the others being Portal and Dunseith. The Noyes–Emerson East Border Crossing, located 2 miles (3.2 km) to the east on the Minnesota side of the Red River, also processed cross-border traffic until its closure in 2006.
Lake Agassiz was a large proglacial lake that existed in central North America during the late Pleistocene, fed by meltwater from the retreating Laurentide Ice Sheet at the end of the last glacial period. At its peak, the lake's area was larger than all of the modern Great Lakes combined. It eventually drained into what is now Hudson Bay, leaving behind Lake Winnipeg, Lake Winnipegosis, Lake Manitoba, and Lake of the Woods.
The Red River, also called the Red River of the North to differentiate it from the Red River in the south of the continent, is a river in the north-central United States and central Canada. Originating at the confluence of the Bois de Sioux and Otter Tail rivers between the U.S. states of Minnesota and North Dakota, it flows northward through the Red River Valley, forming most of the border of Minnesota and North Dakota and continuing into Manitoba. It empties into Lake Winnipeg, whose waters join the Nelson River and ultimately flow into Hudson Bay.
The Pembina Region, also referred to as the Pembina District and Pembina Department, is the historic name of an unorganized territory of land that was ceded to the United States in 1818. The area included the portions of what became the States of Minnesota, North Dakota, and South Dakota lying within the Hudson Bay drainage basin. The area included settlements in the Pembina River area. The region was formerly part of British Rupert's Land, granted by British royal charter to the Hudson's Bay Company. After the Selkirk Concession and establishment of the agricultural Red River Colony in 1812, the area was governed as the District of Assiniboia. The Treaty of 1818 de jure transferred the region south of the 49th parallel to the United States from the British. Settlements south of the boundary continued to be de facto administered as part of Assiniboia until at least 1823.
The Geography of North Dakota consists of three major geographic regions: in the east is the Red River Valley, west of this, the Missouri Plateau. The southwestern part of North Dakota is covered by the Great Plains, accentuated by the Badlands. There is also much in the way of geology and hydrology.
The geology of Minnesota comprises the rock, minerals, and soils of the U.S. state of Minnesota, including their formation, development, distribution, and condition.
The geography of Manitoba addresses the easternmost of the three prairie Canadian provinces, located in the longitudinal centre of Canada. Manitoba borders on Saskatchewan to the west, Ontario to the east, Nunavut to the north, and the American states of North Dakota and Minnesota to the south. Although the border with Saskatchewan appears straight on large-scale maps, it actually has many right-angle corners that give the appearance of a slanted line. In elevation, Manitoba ranges from sea level on Hudson Bay to 2727 ft (831 m) on top of Baldy Mountain. The northern sixty percent of the province is on the Canadian Shield. The northernmost regions of Manitoba lie permafrost, and a section of tundra bordering Hudson Bay.
The U.S. State of Minnesota is the northernmost state outside Alaska; its isolated Northwest Angle in Lake of the Woods is the only part of the 48 contiguous states lying north of the 49th parallel north. Minnesota is in the U.S. region known as the Upper Midwest in interior North America. The state shares a Lake Superior water border with Michigan and Wisconsin on the northeast; the remainder of the eastern border is with Wisconsin. Iowa is to the south, South Dakota and North Dakota are to the west, and the Canadian provinces of Manitoba and Ontario are to the north. With 87,014 square miles (225,370 km2), or approximately 2.26% of the United States, Minnesota is the 12th largest state.
The Pembina Escarpment is a scarp that runs from South Dakota to Manitoba, and forms the western wall of the Red River Valley. The height of the escarpment above the river valley is 300–400 feet (91–122 m).
The Manitoba Escarpment, or the Western Manitoba Uplands, are a range of hills along the Saskatchewan–Manitoba border. The eastern slopes of the range are considered to be a scarp. They were created by glacial scouring and formed the western shore of prehistoric Lake Agassiz.
The Red River Trails were a network of ox cart routes connecting the Red River Colony and Fort Garry in British North America with the head of navigation on the Mississippi River in the United States. These trade routes ran from the location of present-day Winnipeg in the Canadian province of Manitoba across the Canada–United States border, and thence by a variety of routes through what is now the eastern part of the Dakotas and across western and central Minnesota to Mendota and Saint Paul, Minnesota on the Mississippi.
The Traverse Gap is an ancient river channel occupied by Lake Traverse, Big Stone Lake, and the valley connecting them at Browns Valley, Minnesota. It is on the border of the U.S. states of Minnesota and South Dakota. Traverse Gap has an unusual distinction for a valley: it is transected by a continental divide, and in some floods, water has flowed across that divide from one drainage basin to the other. Before the Anglo-American Convention of 1818, it marked the border between British territory in the north and U.S.—or, earlier, French—territory in the south.
Herman Beach is one of several beaches delimiting the shorelines of the prehistoric glacial Lake Agassiz. Of note is that the beaches of Lake Agassiz are presently not adjacent to bodies of water, and consequently, are no longer really beaches at all. Named for its proximity to Herman, Minnesota, Herman Beach was formed 11,700 years ago and runs for hundreds of miles through Minnesota and North Dakota. It has been described as a smoothly-rounded beach ridge made of gravel and sand.
The Glacial Lake Souris occupied the basin of the Souris River from the most southern portion of this river's loop in North Dakota to its elbow in Manitoba, where it turned sharply northward and passed through the Tiger Hills. The length of Lake Souris was about 170 miles, from latitude 48° to latitude 50°35', and its maximum width, north of Turtle Mountain, was nearly 70 miles. It was situated near the far southeast corner of the large glacial Lake Agassiz, separated from it by another small glacial body, Glacial Lake Hind.
The Pembina and Red Lake bands of Chippewa ceded to the United States the Red River Valley of the north in two treaties. Both were named for the treaty site, "Old Crossing" and the year, Treaty of Old Crossing (1863) and the Treaty of Old Crossing (1864). In Minnesota, the ceded territory included all land west of a line running generally southwest from the Lake of the Woods to Thief Lake, about 30 miles (48 km) west of Red Lake, and then angling southeast to the headwaters of the Wild Rice River near the divide separating the watersheds of the Red River of the North and the Mississippi River. In North Dakota, the ceded territory was all of the Red River Valley north of the Sheyenne River. In size, the area was roughly 127 miles (204 km) east-west and 188 miles (303 km) north-south, making it nearly 11,000,000 acres (45,000 km2) of prairie and forest.
St. Laurent is a community on the eastern shore of Lake Manitoba. It lies within the boundaries of the Rural Municipality of St. Laurent, 70 km (43 mi) from Winnipeg. A historically-Métis settlement, St. Laurent is one of the few remaining places in which the Michif French language is still spoken.
