Authors: Ray, G.L.
Reference: Ray, G.L. (2007) Thin Layer Placement of Dredged Material on Coastal Wetlands: A Review of the Technical and Scientific Literature. ERDC/EL Technical Notes Collection (ERDC/EL TN-07-1), Vicksburg, MS: U.S. Army Engineer Research and Development Center
Summary: Thin-layer placement of sediment appears to be generally beneficial for combating sediment depletion, subsidence, and sea-level rise. When hydraulically dredged, liquified, and pumped through a high-pressure spray nozzle, well mixed slurries of uniform layers can be easily placed up to 100 meters from the dredging site. If tranportation costs are not an issue, sediment can be shipped by barge or pumped longer distances. Recovery of different plant species following placement varies. It is often a function of the desired elevation and substrate of the particular species. Placement depth does seem to effect individual plant species on a site specific basis. Water from a sediment slurry has been found to drain rapidly without high levels of turbidity. Oyster larvae can be prevented from settling by just 1mm layers of sediment.
What You Will Find Here: Background p. 1, Discussion p. 5