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MODELING SHORT-TERM BEHAVIOR OF DREDGED MATERIAL DISPOSED IN VERY SHALLOW AND VERY DEEP COASTAL WATERS
Citation:
Dettman, E. AND M.A. Abdelrhman. MODELING SHORT-TERM BEHAVIOR OF DREDGED MATERIAL DISPOSED IN VERY SHALLOW AND VERY DEEP COASTAL WATERS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-96/001 (NTIS PB96143524).
Description:
Modifications have been made to the model for Disposal From an Instantaneous Dump (DIFID), commonly used to simulate transport and fate of dredged material rapidly disposed from a dredge or barge into aquatic systems. hanges include simulation of particulate and contaminant detachment from the descending cloud into the water column, and detailed representation and simulation of discharge dynamics. he latter include effects of vertical density gradients within die dredge hopper on discharge rates, dynamic simulation of exit speed and mass discharge rate from the hopper, and representation of the release as a line source. hese revisions increase the range of physical processes incorporated in the model, permit more realistic calculation of particulate and contaminant concentrations in the water column, and extend its applicability to a broader range of depths. he model gives reasonable agreement with water-column and benthic results obtained in a field study of disposal into a 12-meter water column. ata for model calibration and verification in deep water are not available.