Le Sueur River
The Le Sueur River is a tributary of the Blue Earth River, 111 miles long, in southern Minnesota in the United States. Via the Blue Earth and Minnesota Rivers, it is part of the watershed of the Mississippi River, draining an area of 1,089 square miles, it is the largest tributary of the Blue Earth River, draining 31% of its watershed. Le Sueur River was named for a French explorer of North America; the Le Sueur River rises in Hartland Township in northwestern Freeborn County and flows northwardly, through the southwestern extremity of Steele County into Waseca County westwardly in a winding course into Blue Earth County, passing through St. Clair, it flows into the Blue Earth River southwest of Mankato three miles upstream of the Blue Earth's mouth at the Minnesota River. Its largest tributaries are the Cobb and Maple Rivers, which it collects from the south six and eight miles upstream of its mouth, respectively. A minor tributary of the Le Sueur River in Waseca and Steele Counties is known as the Little Le Sueur River.
The Le Sueur River flows in most of its course on till plains and on the plain of a former glacial lake, through incised ravines in its lower course. Extensions of the Big Woods, a tract of hardwoods that has since been converted to agricultural use followed the river's riparian corridor southward. According to the Minnesota Pollution Control Agency 84% of the larger watershed of the Blue Earth River is used for agricultural cultivation that of corn and soybeans. At the United States Geological Survey's stream gauge near the community of Rapidan, two miles upstream from the river's mouth, the annual mean flow of the river between 1940 and 2005 was 549 cubic feet per second; the highest recorded flow during the period was 24,700 ft³/s on April 8, 1965. The lowest recorded flow was 1.6 ft³/s on February 9, 1959. List of rivers in Minnesota
River Lethe is located 18 km west of Mount Katmai, Alaska Peninsula, is the middle branch of the Ukak River. It flows through the Valley of Ten Thousand Smokes and meets the Ukak at 58°23′44″N 155°24′00″W; the river was named in 1917 by National Geographic Society. A dry channel on Mars is named Lethe Vallis after this river. List of Alaska rivers
A river is a natural flowing watercourse freshwater, flowing towards an ocean, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, brook and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the hydrological cycle. Potamology is the scientific study of rivers, while limnology is the study of inland waters in general. Most of the major cities of the world are situated on the banks of rivers, as they are, or were, used as a source of water, for obtaining food, for transport, as borders, as a defensive measure, as a source of hydropower to drive machinery, for bathing, as a means of disposing of waste.
A river begins at a source, follows a path called a course, ends at a mouth or mouths. The water in a river is confined to a channel, made up of a stream bed between banks. In larger rivers there is also a wider floodplain shaped by flood-waters over-topping the channel. Floodplains may be wide in relation to the size of the river channel; this distinction between river channel and floodplain can be blurred in urban areas where the floodplain of a river channel can become developed by housing and industry. Rivers can flow down mountains, through valleys or along plains, can create canyons or gorges; the term upriver refers to the direction towards the source of the river, i.e. against the direction of flow. The term downriver describes the direction towards the mouth of the river, in which the current flows; the term left bank refers to the left bank in the direction of right bank to the right. The river channel contains a single stream of water, but some rivers flow as several interconnecting streams of water, producing a braided river.
Extensive braided rivers are now found in only a few regions worldwide, such as the South Island of New Zealand. They occur on peneplains and some of the larger river deltas. Anastamosing rivers are quite rare, they have multiple sinuous channels carrying large volumes of sediment. There are rare cases of river bifurcation in which a river divides and the resultant flows ending in different seas. An example is the bifurcation of Nerodime River in Kosovo. A river flowing in its channel is a source of energy which acts on the river channel to change its shape and form. In 1757, the German hydrologist Albert Brahms empirically observed that the submerged weight of objects that may be carried away by a river is proportional to the sixth power of the river flow speed; this formulation is sometimes called Airy's law. Thus, if the speed of flow is doubled, the flow would dislodge objects with 64 times as much submerged weight. In mountainous torrential zones this can be seen as erosion channels through hard rocks and the creation of sands and gravels from the destruction of larger rocks.
A river valley, created from a U-shaped glaciated valley, can easily be identified by the V-shaped channel that it has carved. In the middle reaches where a river flows over flatter land, meanders may form through erosion of the river banks and deposition on the inside of bends. Sometimes the river will cut off a loop, shortening the channel and forming an oxbow lake or billabong. Rivers that carry large amounts of sediment may develop conspicuous deltas at their mouths. Rivers whose mouths are in saline tidal waters may form estuaries. Throughout the course of the river, the total volume of water transported downstream will be a combination of the free water flow together with a substantial volume flowing through sub-surface rocks and gravels that underlie the river and its floodplain. For many rivers in large valleys, this unseen component of flow may exceed the visible flow. Most but not all rivers flow on the surface. Subterranean rivers flow underground in caverns; such rivers are found in regions with limestone geologic formations.
Subglacial streams are the braided rivers that flow at the beds of glaciers and ice sheets, permitting meltwater to be discharged at the front of the glacier. Because of the gradient in pressure due to the overlying weight of the glacier, such streams can flow uphill. An intermittent river only flows and can be dry for several years at a time; these rivers are found in regions with limited or variable rainfall, or can occur because of geologic conditions such as a permeable river bed. Some ephemeral rivers flow during the summer months but not in the winter; such rivers are fed from chalk aquifers which recharge from winter rainfall. In England these rivers are called bournes and give their name to places such as Bournemouth and Eastbourne. In humid regions, the location where flow begins in the smallest tributary streams moves upstream in response to precipitation and downstream in its absence or when active summer vegetation diverts water for evapotrans
Leaf River (Minnesota)
The Leaf River is a 43.6-mile-long tributary of the Crow Wing River in west-central Minnesota in the United States. Via the Crow Wing, it is part of the Mississippi River watershed; the Leaf rises from the Leaf Lakes chain in northeastern Otter Tail County and flows east past the town of Bluffton into southern Wadena County. It joins the Crow Wing River from the west in Thomastown Township, about 10 miles north-northwest of the town of Staples and about 1 mile upstream of the mouth of the Partridge River. On the Crow between the Leaf and Partridge rivers are sites of pre-settlement fur trading posts; the Leaf's largest tributaries are the Wing River and the Redeye River, both of which join it in Wadena County. Leaf River serves as land-cession boundary for the 1847 Treaty of Washington, signed between the Pillager Chippewas and the United States, for the land-cession boundaries for the 1855 Treaty of Washington, signed between the Mississippi Chippewas, Pillager Chippewas and the United States.
The land ceded to the United States by the Pillagers in 1847 was sold to the Menomini, but the Menomini refused removal out of Wisconsin and subsequently sold the land to the United States in 1854. List of rivers of Minnesota
The Lester River, is a 19.3-mile-long tributary of Lake Superior, in northeastern Minnesota in the United States. It drains an area of 58 square miles; the Lester River flows for its entire length in southern Saint Louis County. It rises in Gnesen Township and flows southeastwardly through the city of Rice Lake and Lakewood Township, turning southward as it nears Lake Superior, it flows into the lake in eastern Duluth. Lester River is known as Basaabikaa-ziibi in Ojibwe, meaning "Rocky Canyon River", though Joseph Gilfillan translated its name as "River that comes through a worn hollow place in the rock," as the river passes through a canyon between Lester Park, where Amity Creek joins the Lester River, the mouth of the river. Lester River bears the name of an early settler. Along the Lester River are two properties listed on the National Register of Historic Places, they are: Duluth. Built in 1882, the complex is located at the mouth of the Lester River, it is owned by the University of Minnesota Duluth and temporarily housed the Great Lakes Aquarium administrative offices at the beginning of the aquarium's operations.
The complex consists of the Hatchery/Bunk-room Building, Boat House, Pump House, Supervisor's Cabin on the south side of Congdon Boulevard, a Superintendent's House on the north side of Congdon Boulevard. Between 2011 and 2013, it was given an extensive renovation. List of rivers of Minnesota Upham, Warren. Minnesota place names: a geographical encyclopedia. St. Paul: Minnesota Historical Society Press. ISBN 0-87351-396-7. Waters, Thomas F.. The Streams and Rivers of Minnesota. Minneapolis: University of Minnesota Press. ISBN 0-8166-0960-8
The Lackawaxen River is a 31.3-mile-long tributary of the Delaware River in northeastern Pennsylvania in the United States. The river flows through a rural area in the northern Pocono Mountains, draining an area of 598 square miles, its source is in the borough of Prompton in western Wayne County, at the confluence of the West Branch and Van Auken Creek. It flows past Hawley, where it is joined from the southwest by Wallenpaupack Creek. Water discharged from the Lake Wallenpaupack hydroelectric facility enters the river downstream from Hawley; the river joins the Delaware at Lackawaxen. East of Honesdale, it was deepened as part of the Hudson Canal project; the river is a popular destination for canoeing and recreational fly fishing for trout. It was where the American author Zane Grey first learned to fly fish. Lackawaxen is Lenape for "swift waters"; the West Branch 21.5 miles long, rises from a confluence of several small streams in the villages of Orson and Poyntelle in northern Wayne County, flows south-southeast through Belmont Lake in Belmont Corners.
After a second confluence, with Johnson Creek, it flows southeast through Prompton Lake reservoir, to a third confluence, with Van Auken Creek, to form the main stem. List of Pennsylvania rivers Lackawaxen River Conservancy Pike County Conservation: Lackawaxen watershed Lackawaxen Aqueduct U. S. Geological Survey: PA stream gaging stations
The Lemhi River is a 60-mile-long river in Idaho in the United States. It is a tributary of the Salmon River, which in turn is tributary to the Snake River and Columbia River. From its source near Leadore and the confluence of several headwater streams, the Lemhi River flows northwest, through the Lemhi Valley, between the Lemhi Range to the west, the Bitterroot Range and Beaverhead Mountains to the east; the Lemhi River flows into the Salmon River at the city of Salmon. The water of the Lemhi River and its tributaries is used for irrigation agriculture. Of the river's mainstem tributaries, only 7% are not disconnected year round due to diversion for irrigation. In August 1805 Lewis and Clark crossed the continental divide at the Lemhi Pass 10 miles to the east of the Lemhi River. There, the group encountered a tribe of Shoshone Indians, one of whom turned out to be Cameahwait, brother of Sacagawea; the expedition sent a reconnaissance party, guided by Swooping Eagle, North along the Lemhi to the Salmon River attempting to find a navigable path, but turned back when they found that the Salmon was not passable by boat or on land.
Lemhi List of rivers in Idaho List of longest streams of Idaho Media related to Lemhi River at Wikimedia Commons