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Unformatted text preview: Delta switching occurs in response to build up of sediments at the river mouth and the subsidence elsewhere.-New wetlands are formed by delta switching-Existing wetlands are built up by sediments deposited during floods.-These processes have been stopped by human intervention in the sedimentation process. Land subsidence and land loss increases flooding risk-Hurricane Katrina Parts of New Orleans that lie below the level of the Mississippi River and Lake Pontchartrain are at very high risk of flooding in spite of reconstructed levees. Glaciers are large bodies of ice that flow in response to their weight-Glaciers cause significant amounts of physical erosion and contain massive amounts of water...
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- Fall '08