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In hydrology, a debouch (or debouche) is a place where
In hydrology, a debouch (or debouche) is a place where runoff
Runoff, run-off or RUNOFF may refer to:
* RUNOFF, the first computer text-formatting program
* Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed
* Runoff or run-off, a stock market ...
from a small, confined space discharges into a larger, broader body of water. The word is derived from the French verb ''déboucher'' (), which means "to unblock, to clear". The term also has a military usage.
Geology
In 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.Geography
Influvial
In geography and geology, fluvial processes are associated with rivers and streams and the deposits and landforms created by them. When the stream or rivers are associated with glaciers, ice sheets, or ice caps, the term glaciofluvial or fluviog ...
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
A stream is a continuous body of water, body of surface water Current (stream), flowing within the stream bed, bed and bank (geography), banks of a channel (geography), channel. Depending on its location or certain characteristics, a stream ...
emerges from a narrow constraining landform
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, ...
, such as a defile, into open country or a wider space; a creek
A creek in North America and elsewhere, such as Australia, is a stream that is usually smaller than a river. In the British Isles it is a small tidal inlet.
Creek may also refer to:
People
* Creek people, also known as Muscogee, Native Americans
...
joins a river; or a stream flows into a lake.
Military
In 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".See also
* Fluvial landforms of streams * Region of freshwater influenceReferences
External links
* {{Coastal geography Fluvial landforms Rivers Water streams Military terminology