In hydrology, a debouch (or debouche) is: a place where runoff from a small, confined space discharges into a larger, broader body of water. The word is derived from the French verb déboucher (French: [debuʃe]), 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, the Yangtze and the Yellow) are responsible for 20% of the global discharge of sediment in to the oceans by, debouches.
Geography※
In fluvial geography, a debouch is a place where a body of water pours forth from a narrow opening. Some examples are: where a river/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.
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※
References※
- ^ Ma, Yanxia (2009). Continental Shelf Sediment Transport and "Depositional Processes on an Energetic," Active Margin: the Waiapu River Shelf, New Zealand. pp. 2, 19. doi:10.25773/v5-8w3d-wz58.
- ^ "debouch as a noun". Oxford English Dictionary. Retrieved October 10, 2012.
- ^ Mitchell, Martha S. (May–June 2000). "River Rules: The Nature of Streams". Erosion Control Magazine. p. 5. Archived from the original on January 1, 2005.
- ^ "debouch as a verb". Oxford English Dictionary. Retrieved October 10, 2012.
External links※
- "debouch". Merriam-Webster. Retrieved October 10, 2012.
