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• n  the phenomenon of sediment or gravel accumulating

• Historically, that subsidence has been counteracted by sedimentation: new silt, sand and clay that are deposited when the river floods.
• Threatened reefs As much as 86% of Indonesia's coral reefs, home to thousands of marine species, are severely damaged by overfishing, sedimentation and pollution.
• Adding land through sedimentation is one of the best ways of restoring wetlands.

• deposit
• alluviation

News & Articles

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• Officials: Water plant probe focuses on secondary testing
  GLENS FALLS -- The investigation into activities at the Glens Falls water filtration plant centers around secondary testing for sedimentation in drinking water, said Mayor John “Jack” Diamond.
  June 20, 2013 - The Post-Star

Quotes

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• Peg Lautenschlager in Democratic Party of Wisconsin (press release)
  The traditional threats -- sedimentation, pollution and algae growth -- endure and require ongoing, sustained attention. And new challenges -- in the form of global warming and catastrophic fire -- have emerged as major threats. If we stop now, the... Dianne Feinstein http://www.google.com/url?q=http://en.wikipedia.org/wiki/Dianne_Feinstein&source=dictionary&usg=AFQjCNFl9GDVMy9rRgYyanHYDe6hddMtiQ Reno Gazette Journal http://www.google.com/url?q=http://www.rgj.com/apps/pbcs.dll/article%3FAID%3D/20080817/NEWS/808170342/1321&source=dictionary&usg=AFQjCNFYEpuzZxP_oYWCdVE60xgb6EO3BQ Aug 17, 2008 87442 116907 sedimentation The kind of sedimentation that occurred here as the result of these violations can destroy important features of wetlands and lakes," Lautenschlager said.