Facts about River
The majority of the erosion of river channels and the erosion and deposition on the associated floodplains occur during flood stage.
A river may have its source in a spring, lake, from damp, boggy places where the soil is waterlogged, from glacial meltwater, or simply from rain flowing off impermeable rock or man-made surfaces.
Water may also be recruited to a river from groundwater sources.
Many early feminists fought for their repeal, either on the grounds that prostitution should be illegal and therefore not government regulated or because it forced degrading medical examinations upon women.
From their source, all rivers flow downhill, typically terminating in the sea or in a lake.
Excessive abstraction of water for use in industry, irrigation etc can also cause a river to dry before reaching a lake or the sea.
The area drained by a river and its tributaries is called catchment, catchment basin, drainage basin or watershed.
A river's water is generally confined to a channel, made up of a stream bed between banks.
Most commonly, rivers flow on the surface of the land, but there are also many examples of underground rivers, where the flow is contained within chambers, caves, or caverns.
Human activity, however, has upset the natural way flooding occurs by walling off rivers, straightening their courses and by draining of natural wetlands.
River management is an ongoing activity, as rivers tend to 'undo' the modifications made by man.
Braided rivers can still be commonly seen in South Island New Zealand and on some of the larger river deltas.
The flora and fauna of rivers have developed to utilize the very wide range of aquatic habitats available, from torrential waterfalls to lowland mires.
The Orange River forms the boundary between various provinces and countries along its route in Africa.
A river flowing in its channel is a source of considerable energy which acts on the river channel to change its shape and form.
Rivers are often managed or controlled to make them more useful and less disruptive to human activity.
The benefits sought through managing rivers may often be offset by the social and economic costs of mitigating the effects of such management.
A river is a natural waterway that conveys water derived from precipitation from higher ground to lower levels.
Floodplains may be very wide in relation to the size of the river channel.
The river channel itself may contain a single stream of water but many rivers, if left unconstrained by human activity, will create several streams of water within a channel producing a braided river.
Sometimes the river will cut off a loop, shortening the channel and forming an oxbow lake.
River flow may also be lost by percolation into dry, porous material such as sand, soil, or into pervious rock.
Almost all rivers are joined by other rivers and streams termed tributaries, the highest of which are known as headwaters.
A misconception, particularly amongst schoolchildren and college students in North America, is that most—or even all—rivers flow from north to south.
Rivers in fact flow downhill irrespective of direction and is often a complex meandering path involving all directions of the compass.
Human activity, however, has upset the natural way flooding occurs by walling off rivers, straightening their courses and by draining of natural wetlands.
The mouth, or lower end, of a river is known by hydrologists as its base level.
Rivers with beaver dams in their head waters have lower high-water and higher low-water levels.
The majority of the erosion of river channels and the erosion and deposition on the associated floodplains occur during flood stage.
The word "Nile" comes from Greek Neilos (ὁ Νεῖλος). Neilos came from the word "river valley". In the ancient Egyptian language, the Nile is called Ḥ'pī or iteru, meaning "great river", represented by the hieroglyphs shown above (literally itrw, and 'waters' determinative).
When the floods went down it left thick rich mud (black silt) which was excellent soil to plant seeds in after it had been ploughed. The ancient Egyptians could grow crops only in the mud left behind when the Nile flooded. So they all had fields all along the River Nile.
Animals Living In and Around the River Nile. There are a vast number of animals that live in and around the River Nile, attracted by its fertile waters. ... Reptiles. The most well-known and common reptile to be found in the River Nile area is the famous Nile crocodile. ... Hippopotamus and Rhino. ... Fish.
They live throughout sub-Saharan Africa, the Nile Basin, and Madagascar in rivers, freshwater marshes, and mangrove swamps. The diet of the Nile crocodile is mainly fish, but it will attack almost anything unfortunate enough to cross its path, including zebras, small hippos, porcupines, birds, and other crocodiles.
The Blue Nile, however, is the source of most of the water and silt. The White Nile is longer and rises in the Great Lakes region of central Africa, with the most distant source still undetermined but located in either Rwanda or Burundi. It flows north through Tanzania, Lake Victoria, Uganda and South Sudan.
John Hanning Speke
The world's longest river, located in Egypt, the Nile flows 4,132 miles (6,650 kilometres) northward to the Mediterranean Sea (a very unusual direction for a river to take). It was considered the source of life by the ancient Egyptians and has played a vital role in the country's history.
Nile river
A river begins life high in the hills or mountains. In a cold region, a river may be created by melting snow or a glacier. In warmer places, rivers typically form when water drains from a whole series of upland slopes known as a basin. ... The brooks, streams, and creeks that form a river are called its tributaries.Aug 17, 2017
Most rivers begin life as a tiny stream running down a mountain slope. They are fed by melting snow and ice, or by rainwater running off the land. The water follows cracks and folds in the land as it flows downhill. Small streams meet and join together, growing larger and larger until the flow can be called a river.
Some rivers begin where a natural spring releases water from underground. The source of the River Thames is a spring. Some rivers begin in mountains or hills, where rain water or snowmelt collects and forms small channels, . At first, the channels are small and are called rills.Feb 12, 2018
Rivers carry water and nutrients to areas all around the earth. They play a very important part in the water cycle, acting as drainage channels for surface water. Rivers drain nearly 75% of the earth's land surface. Rivers provide excellent habitat and food for many of the earth's organisms.
A river grows larger as it collects water from more tributaries along its course. The great majority of rivers eventually flow into a larger body of water, like an ocean, sea, or large lake. The end of the river is called the mouth.
Freshwater rivers are often home a wide variety of species from insects, to amphibians, reptiles, fish, birds and even mammals. Turtles, ducks, otters, crocodiles, catfish, dragonfly and crabs can be found in rivers all around the world, and the Amazon river is even home to the rare and pink, freshwater dolphin.
The bed (also called the river bed) is the bottom of the river (or other body of water). brackish. Beackish water is water that is saltier than river water but less salty than sea water. channel. A channel is an area that contains flowing water confined by banks.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, 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.
A river usually ends by flowing into an ocean, a lake or a bigger river. The place where the river flows out into a bigger body of water is called the 'mouth' of the river.
Amazon River Is 11 Million Years Old, Drilling Study Finds. Date: July 8, 2009 Source: Universiteit van Amsterdam (UVA) Summary: The Amazon River originated as a transcontinental river around 11 million years ago and took its present shape approximately 2.4 million years ago.Jul 8, 2009
De Soto
The 29 lock and dams on the Upper Mississippi make that shipping possible, allowing for navigation from St. Louis, Missouri, to Saint Paul, Minnesota, a total distance of 854 miles. There are records of human habitation along the Mississippi river that date back more than five thousand years.
The formation of the Mississippi River Delta can be traced back to the late Cretaceous Period, approximately 100 million years ago, with the creation of the Mississippi embayment. The embayment began focusing sediment into the Gulf of Mexico, which facilitated the deltaic land-building processes for the future.
The state of Mississippi is named after the Mississippi River. Though the river was called by many different names, the name Mississippi given to it by the Indians was the name that was used on Robert Cavelier Sieur de La Salle's map of the area in 1695. Mississippi means "large river" to the Chippewa Indians.Jul 28, 2017
Congo River
At Lake Itasca, the river is between 20 and 30 feet wide, the narrowest stretch for its entire length. The widest part of the Mississippi can be found at Lake Winnibigoshish near Bena, MN, where it is wider than 11 miles.Nov 14, 2017
10 states
The Amazon River is a heck of a big tributary. Besides being one of the LONGEST rivers in the world, it also happens to be the WIDEST. While its estimated length of 4,000 miles (6,400 kilometers) puts it under the Nile River, that statistic could be amended as some believe it's even longer than that.Feb 5, 2015
It measures 6,695 kilometres from its source in Burundi, along the White Nile, to its delta on the Mediterranean Sea. Officially, the shortesr river is the D River, Oregan, USA, which is just 37 metres long. The biggest river in the world, measured by the amount of water that flows down it, is the Amazon.
Ganges River BasinMap of the Ganges (orange), Brahmaputra (violet), and Meghna (green) drainage basins.Yamuna River drainage basin map.Godavari, Andhra Pradesh, one of the widest rivers in India.Hogenakkal Falls, on the Kaveri River.