Aggradation

Aggradation

Aggradation in geology is the accumulation of sediment in rivers and nearby landforms. Aggradation occurs when sediment supply exceeds the ability of a river to transport the sediment. As an example, the quantity of sediment entering a river channel may increase when climate becomes drier. The increase in sediment is caused by a decrease in soil binding that results from plant growth being suppressed. The drier conditions cause river flow to decrease at the same time as sediment is being supplied in greater quantities. Hence, the river becomes choked with sediment.

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References

* [http://www.glossary.oilfield.slb.com/Display.cfm?Term=aggradation Schlumberger Oilfield Glossary]
* [http://www.uwsp.edu/geo/faculty/ritter/glossary/a_d/aggradation.html "The Physical Environment" Glossary definition]


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  • Aggradation — En géologie, l aggradation ou exhaussement est l accumulation de sédiments dans le lit d un cours d eau et ses environs directs. L aggradation survient lorsque l apport de sédiments excède les capacités de transport du cours d eau. Par exemple la …   Wikipédia en Français

  • Aggradation — Anlandung oder auch Aggradation bezeichnet im Gegensatz zur Verlandung eine Ablagerung von Bodenmaterial, das von außen antransportiert (z. B. Kies, Sand, Lehm) und an Küsten und Ufern abgelagert wird. Die Anlandung kann der Beginn einer… …   Deutsch Wikipedia

  • aggradation — noun Etymology: ad + gradation Date: 1898 a modification of the earth s surface in the direction of uniformity of grade by deposition • aggradational adjective …   New Collegiate Dictionary

  • aggradation — See aggrade. * * * …   Universalium

  • aggradation — noun accretion or deposition …   Wiktionary

  • aggradation —   deposition of load within river channels …   Geography glossary

  • Aggradation — Anlandung …   Universal-Lexikon

  • aggradation —    Land addition through sediment deposition [16] …   Lexicon of Cave and Karst Terminology

  • aggradation —    The building up of the Earth s surface by deposition; specifically, the accumulation of material by any process in order to establish or maintain uniformity of grade or slope; also called accretion.    Compare: degradation.    GG …   Glossary of landform and geologic terms

  • aggradation — ag·gra·da·tion …   English syllables

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