What is a river and it's tributaries is call?
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together they are called the catchment.  The (name of river/lake) catchment
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Here are some long rivers\n\n1  Nile River (6,690 km) \n2  Amazon (6,452km) \n3  Yangtze (Chang Jiang) (6,380 km) \n5  Mississippi-Missouri (6,270 km) \n5  Ob-Irtysh (5,570 km) \n6  Yenisey-Angara (5,550 km) \n7  Huang He (Yellow) (5,464 km) \n8  Amur (4,410 km) \n9  Congo (4,380 km or 4,670 km). (The source of this river is disputed.) \n10 Lena (4,260 km)
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Impossible to answer. No one has ever counted them all and how do you define a river? Here what we define as a river may de called a creek over there.\n\nGod is the only one I know who truely knows the answer to this question.\n\nThe answer would be in the 100,000's though.
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http://en.wikipedia.org/wiki/Jordan_River
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Rivers empty into major bodies of water...tributaries empty into rivers
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Lengths of the major rivers\nTake a look at a map of the United States or of any country in the world. Notice how towns and cities tend to be located next to rivers? This is no coincidence. Rivers provide water for the essential needs of both tiny towns and huge cities. There's a good chance that you live near one of our nation's large rivers. Ever wonder what rivers are the longest? Look at the graphic below to see our short list of long rivers.\n\n(It's not so easy to define how long a river is. If a number of tributaries merge to form a larger river, how would you define where the river actually begins? Here, we define river length as the distance to the outflow point from the original headwaters where the name defines the complete length. (Source: Statistical Abstract of the U.S., 1986))\n\nWORLD\n\n Nile: 4,132 miles\n Amazon: 4,000 miles\n Yangtze: 3,915 miles\n\nUNITED STATES\n\n Missouri: 2,540 miles\n Mississippi: 2,340 miles\n Yukon: 1,980 miles\n Rio Grande: 1,900 miles\n St. Lawrence: 1,900 miles\n Arkansas: 1,460 miles\n Colorado: 1,450 miles\n Atchafalaya: 1,420 miles\n Ohio: 1,310 miles\n Red: 1,290 miles\n Brazos: 1,280 miles\n Columbia: 1,240 miles\n Snake: 1,040 miles\n Platte: 990 miles\n Pecos: 926 miles\n Canadian: 906 miles\n Tennessee: 886 miles\n Colorado (of Texas): 862 miles\n North Canadian: 800 miles\n Mobile: 774 miles\n Kansas: 743 miles\n Kuskokwim: 724 miles\n Yellowstone: 692 miles\n Tanana: 659 miles\n Milk: 625 miles\n Quachita: 605 miles\n Hamilton: 600 miles\n Cimarron: 600 miles\n\nThe Yellowstone River is the longest free flowing river in the lower 48 states. Unshackled by dams, the 680-mile river begins its journey in the mountains of northwest Wyoming and extends to meet with the Missouri River in northeastern Montana. Fish, float or simply appreciate this national treasure.\n\nThe Yellowstone River, the longest free-flowing river in The United States, is a world-class blue ribbon trout stream, teaming with trophy-size Cutthroats, Browns and Rainbows. It flows North through Paradise Valley from its source, Yellowstone Lake, in famed Yellowstone National Park
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Here's a data base of world rivers.........maybe more than you wanted to know, monthly data for many years along with average monthly and yearly discharges\n\nhttp://www.sage.wisc.edu/riverdata/
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Rivers & streams are parts of drainage basins (aka watersheds). This means that they drain most of the surface water from an area.\n\nWhen it rains very heavily, it runs off & goes into the rivers & streams b/c they are lower in elevation. This is called surface runoff.\n\nRivers are only capable of handling a certain amount of water at a time. When it reaches flood stage it will overflow it's banks.\n\nAlthough it is possible for a lake to flood, more than likely it will not. It is less likely to get all the surface runoff from the surrounding area.\n\nOceans are not going to flood unless sea level rises. There is no real "normal" flood stage for oceans. Over time they transgress & regress in response to climate change. Water is constantly being evaporated from the oceans as well.\n\nMost of our precipitation comes from water vapor that was evaporated from the oceans. This is simply b/c oceans cover the majority of the planet.\n\nHope this helps.
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They are meanders.   They can develop into oxbow lakes if, for example, the meander is like a C so that the ends of the C are close together.   Then, if there is a flood, the water may join the ends together, forming a D shape (can't turn the D round!), the water rushes down the straight edge, depositing silt where the C shape meets the straight edge.   Then you end up with an oxbow lake.   \n\nThen I thought I would find a little bit of information for you about meanders that would not confuse you as much as my oxbow explanation!\n\nA meander is a bend in a river, also known as an oxbow loop. A stream or river flowing through a wide valley or flat plain will tend to form a meandering stream course as it alternatively erodes and deposits sediments along its course. The result is a snaking pattern as the stream meanders back and forth across its floodplain. When a meander gets cut off from the main stream body, an oxbow lake is formed.\n\nA meander is formed because the river flows faster on the outside edge of any small curve and slower along the inside edge. Deposition of sediment occurs on the inner edge because the river, moving slowly, cannot carry its sediment load, creating a slip-off slope. The faster moving current on the outside bend has more erosive ability and the meander tends to grow in the direction of the outside bend, forming a river cliff. This can be seen in areas where willows grow on the banks of rivers; on the inside of meanders, willows are often far from the bank, whilst on the outside of the bend, the roots of the willows are often exposed and undercut, eventually leading the trees to fall into the river. This demonstrates the river's movement.\n\nOrigin of term\nThe term derives from the Maeander River river in Turkey, characterised by a very convoluted path. As such, early usage of the term, from the late 1500s, referred to convoluted and windy speech and ideas, as well as the geomorphological feature. The river in Turkey is called Menderes River, south of Izmir, near the town of ancient Greek town of Miletos.\n\nMeander ratio\nMeander ratio is a means of quantifying how much a river or stream meanders (how much its course deviates from the shortest possible path). It is calculated as the length of the stream divided by the length of the valley. A perfectly straight river would have a meander ratio of 1 (it would be the same length as its valley), while the higher this ratio is above 1, the more the river meanders.
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river\n\nn : a large natural stream of water (larger than a creek); \n\nIf it didn't have water, I don't think it would be called a river.
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What river in England?\n\nTry the following Yahoo Searches:\nmap england\nmap thames river england
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Eons ago there were rivers\n\nTh
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because it has river banks
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No. Rivers have a number of characteristics common at different stages of their development. These are seen from their source down to the river mouth and are recognisable landforms and topographic features of the river valley, channel and adjacent flood plain. Such characteristics are divided into the stages of: young, mature and old. Meanders are characteristics of the old stage.
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A river is more narrow and it usually flows. A lake is a body of water like the ocean is but much smaller, & it usually doesn't flow toward one direction like a river does.
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Hobart, Tasmania, Australia: Main river = River Derwent\n\nCamberra, Australia:  Main River = Molonglo River\n\nFYI: KAMBERRA (from which the name Canberra is derived) - this Aboriginal word, spoken by tribes on the Limestone Plains, meant 'a meeting place' either of rivers
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Missouri River\n\nArkansas River (in Kansas it's pronounced "ar-KAN-sus," not "AR-kun-saw")\n\nNeosho River\n\nRepublican River\n\nand others:\nhttp://en.wikipedia.org/wiki/Category:Rivers_of_Kansas