They have a house on the river. River definition, a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. It cuts through the land and picks up soil and gravel. Sadly, many animals who live in rivers are endangered. A watershed boundary, also called a drainage divide, marks the outer-most limit of a watershed. A river is freshwater flowing across the surface of the land, usually to the sea. The raft is too small to use on this part of the river. This process is known as deposition. Accessed 11 Nov. 2020. Rivers flow in channels. Already registered? Arroyo and (dry) wash connote ephemeral streams or their resultant channels. They are also classified as a flowing body of water, meaning that the water moves as opposed to a lake, where the water stays still. Dams are also used to control the flow of rivers. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins The moving water and the material it carries wear away even more rock and soil. Which two crops were popular along the Tiber River? To learn more, visit our Earning Credit Page. For example, there are many rivers in rainforest environments where you might find piranhas, anacondas, and electric eels. The discharge of rivers to the oceans delivers to these systems the equivalent of the water vapour that is blown overland and then consequently precipitated as rain or snow—i.e., some 7 percent of mean annual precipitation on the globe and 30 percent of precipitation on land areas. Log in or sign up to add this lesson to a Custom Course. Get exclusive access to content from our 1768 First Edition with your subscription. But you know, I had only one other hero in my life acting and that was River [Phoenix]. Rivers provide us with food, energy, recreation, transportation routes, and of course water for irrigation and for drinking. Our latest podcast episode features popular TED speaker Mara Mintzer. Rivers are freshwater bodies of water, meaning that they have a very low concentration of salt or no salt at all. Articles from Britannica Encyclopedias for elementary and high school students. Aerial view of the Amazon River in Brazil. the Mississippi River. In its upper course the river flows rapidly. Water that has from something. flashcard set{{course.flashcardSetCoun > 1 ? An error occurred trying to load this video. Find out more about the different sources of rivers. This article concentrates on the distribution, drainage patterns, and geometry of river systems; its coverage of the latter includes a discussion of channel patterns and such related features as waterfalls. The water may come from rainfall, from melting snow or ice, or from underground through a spring. A river is a moving body of water that flows from its source on high ground, across land, and then into another body of water, which could be a lake, the sea, an ocean or even another river. Study.com has thousands of articles about every Rivers begin at their source in higher ground such as mountains or hills, where rain water or melting snow collects and forms tiny streams. Today, the train chugs north out of Kanchanaburi over the famous bridge before it hits a spectacular bend in the river. [=on land next to the river] Large boats came up/down the river. For information concerning the plant and animal forms that inhabit the riverine environment, see inland water ecosystem. Learn a new word every day. Extraordinarily high rates have been recorded for some lesser rivers: for instance, 1,060 tons per square kilometre per year on the Jing and 1,080 tons per square kilometre per year on the Luo, both of which are Loess Plateau tributaries of the Huang He. Not sure what college you want to attend yet? {{courseNav.course.topics.length}} chapters | Most valleys are formed by rivers that erode , or wear down, soil and rocks. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. See the full definition for river in the English Language Learners Dictionary, Thesaurus: All synonyms and antonyms for river, Nglish: Translation of river for Spanish Speakers, Britannica English: Translation of river for Arabic Speakers, Britannica.com: Encyclopedia article about river. To unlock this lesson you must be a Study.com Member. Learner's definition of RIVER [count] 1 : a large natural flow of water that crosses an area of land and goes into an ocean, a lake, etc. The snow and ice from the mountaintop melts and trickles down the side of the mountain. They use these almadias for catching fish, and for transporting themselves up or down the river. When people eat fish taken from polluted streams, the pollution passes into their bodies and can cause cancer or other health problems. The Nile, Amazon, Yangtze, Mississippi, Lena, Yellow, and Congo Rivers. History Biography Geography Science Games. Crossing the river Lykus into the plain, Mithridates offered the Romans battle. River water losses result from seepage and percolation into shallow or deep aquifers (permeable rock layers that readily transmit water) and particularly from evaporation. These streams are called tributaries. to be sent up the river for a bank robbery. They also shape the land by carving out valleys and canyons. Please note: Text within images is not translated, some features may not work properly after translation, and the translation may not accurately convey the intended meaning. Pollution does not just affect the creatures that live in the water. The direction that the river is flowing is known as downstream and this movement of a river is known as its current. A watershed is a tract of land drained by a river and its tributaries. What made you want to look up river? Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers. A wide, natural stream of fresh water that flows into an ocean or other large body of water and is usually fed by smaller streams, called tributaries, that enter it along its course. This saying means that they feel like they are working really hard and not getting anywhere. Earn Transferable Credit & Get your Degree, How are Mountains Formed? How many counties border the Delaware River? Where was the Chowan River Basin in the Triassic Period? Thirty years up the river had made him a stranger to society. Can you spell these 10 commonly misspelled words? the raising or rising of a body in air by supernatural means. River, (ultimately from Latin ripa, “bank”), any natural stream of water that flows in a channel with defined banks . Improved homework resources designed to support a variety of curriculum subjects and standards. Their rate of sediment delivery is equivalent to an average lowering of the lands by 30 centimetres (12 inches) in 9,000 years, a rate that is sufficient to remove all the existing continental relief in 25,000,000 years. What Is The Difference Between “It’s” And “Its”? It takes many tributary streams to form a river. Large riverboats called barges still carry grain, coal, and minerals. just create an account. credit by exam that is accepted by over 1,500 colleges and universities. Rivers can vary in size and there is no hard definition or rule on how big a flow of water must be to be categorized as a river. Updates? Why Do “Left” And “Right” Mean Liberal And Conservative? As the river flows downstream, it gains more water from other streams, rivers, springs, added rainfall, and other water sources. Dictionary.com Unabridged ©Copyright Mandy Barrow 2013 Through deposition, rivers pick up materials along the way and dump them at their ends to create deltas. Generally speaking, except in high latitudes and on steep coasts, little or no coarse bed load ever reaches the sea. A river is a large natural stream of water that flows over land. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. Even though rivers hold only a tiny fraction of Earth’s total water, they have always been essential to human civilization. A river and its tributaries make up a river system. Well over half of suspended load is deposited at river mouths as deltaic and estuarine sediment. We’ve been busy, working hard to bring you new features and an updated design. and career path that can help you find the school that's right for you. I wouldn't go swimming in a rainforest river if I were you! Our editors will review what you’ve submitted and determine whether to revise the article. Suspended sediment transport on the Huang He equals a denudation rate of about 3,090 tons per square kilometre (8,000 tons per square mile) per year; the corresponding rate for the Ganges-Brahmaputra is almost half as great. The American Heritage® Science Dictionary The fertile area where a river meets the sea is called a delta. People still depend on rivers for much of their water supply. Soil, gravel and sand begin to sink to the bottom. Floodplains provided fertile soil for crops, and the system called irrigation allowed people to use rivers to water their fields. In one sense, such geomorphic features belong to the same series as deltas, estuary fills, and the terrestrial sediments of many inland basins. Kids learn about world rivers. Most settlements were built along major rivers. Lakes hold less than 0.5 percent of all fresh water, soil moisture accounts for about 0.05 percent, and water in river channels for roughly half as much, 0.025 percent, which represents only about one four-thousandth of the Earth’s total fresh water. This means that the number of the species is quickly decreasing and they are on their way to being extinct. This material may build up to form a piece of land called a delta. The Amazon River, for example, is the widest river in the world and is about 25 miles wide at its widest point during the rainy season. We hope you and your family enjoy the NEW Britannica Kids. power or ability to act or to influence people, events, decisions, etc. Log in here for access. While there are millions, possibly even billions, of rivers in the world, there are a few that stand out. The longest river in the world is the Nile River in Africa, and it is about 4,300 miles long. “River.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/river. River, (ultimately from Latin ripa, “bank”), any natural stream of water that flows in a channel with defined banks . A valley is a long depression, or ditch, in Earth’s surface. No one has determined how many rivers there are in the world yet, so get counting! All rights reserved. a large natural stream of fresh water flowing along a definite course, usually into the sea, being fed by tributary streams, the fifth and final community card to be dealt in a round of Texas hold 'em.