| 词条 | Debouch |
| 释义 |
In the geography of rivers, streams, and glaciers, a debouch, or debouche, is a place where runoff from a small, confined space emerges into a larger, broader space. The term is of French origin and means to cause to emerge. The term also has a military usage.[1] GeologyIn fluvial geomorphology, a debouch is a place where runoff from a small, confined space emerges into a larger, broader space. Common examples are when a stream runs into a river or when a river runs into an ocean. Debouching can generate massive amounts of sediment transport. When a narrow stream travels down a mountain pass into a basin, an alluvial fan will form from the mass deposit of the sediment. The four largest rivers (the Amazon, the Ganges-Brahmaputra, the Yangtze and the Yellow) are responsible for 20% of the global discharge of sediment in to the oceans by debouches.[2] GeographyIn fluvial geography, a debouch is a place where a body of water pours forth from a narrow opening. Some examples are: where a river or stream emerges from a narrow constraining landform, such as a defile, into open country or a wider space; a creek joins a river; or a stream flows into a lake.[3] MilitaryIn military usage of debouch: as a noun, a fortification at the end of a defile is sometimes known as a debouch; and as a verb, soldiers emerging from a narrow space and spreading out are also said to "debouch". [4] See also
References1. ^{{citebook | date = 2009 |title = Continental Shelf Sediment Transport and Depositional Processes on an Energetic, Active Margin: the Waiapu River Shelf, New Zealand |first = Yanxia | last = Ma |pages = 2,19}} 2. ^{{citeweb| url= http://www.oed.com/view/Entry/47918?rskey=Lfbkiz&result=1&isAdvanced=false#eid |title= debouch as a noun| website = Oxford English Dictionary |accessdate = October 10, 2012}} 3. ^{{citebook | date = |title = River Rules: The Nature of Streams |first = Martha S| last = Mitchell|page = 5}} 4. ^{{citeweb| url= http://www.oed.com/view/Entry/47919#eid7298094 |title= debouch as a verb | website = Oxford English Dictionary |accessdate = October 10, 2012}} External links{{Sister project links|1= |collapsible= |display=Debouch |position= |style= |wikt= debouch|c= Debouch |commonscat= |n= no |q= no |s= no |author=no |b=no |v=no |voy= no |d= Q4156318|m=no |mw= no |species= no |species_author=no }}
4 : Fluvial landforms|Rivers|Water streams|Military terminology |
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