Sediment Penetration in Lakes as a Result of Dredged Material Disposal and River Sediment Loads

by Alaa El Zawahary, McMaster Univ, Hamilton, Ont, Canada,
William James, McMaster Univ, Hamilton, Ont, Canada,

Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution


Pollutant transport within the coastal boundary layer is highly sensitive to the vertical current structure and to the magnitude of the vertical current, especially during upwelling and downwelling episodes. To generate coastal currents, a rigid-lid channel-type model was modified to include the non-linear acceleration terms, and two different forms of the vertical eddy viscosity were added. A computer program called SEDTRAN was developed to predict the sediment concentration distribution within the coastal boundary layer. The model was partially validated using the limited suspended sediment measurements collected by the Heidelberg College water quality laboratory in Lake Erie. To investigate the effect of coastal currents on the suspended sediment plume and patch, and the extent of suspended sediment in both coastal and offshore waters, several types of sediment-related activities were studied: continuous dredging using side-caster dredge; dumping of sediment spoils; and river sediment loads. Refs.

Subject Headings: Sediment | Suspended sediment | Ocean currents | Sediment transport | Water pollution | Lakes | Dredged materials

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