Record Display for the EPA National Library Catalog


Main Title Modeling Short-Term Behavior of Dredged Material Disposed in Very Shallow and Very Deep Coastal Waters.
Author Dettmann, E. H. ; Abdelrhman, M. A. ;
CORP Author National Health and Environmental Effects Research Lab., Narragansett, RI. Atlantic Ecology Div.
Publisher 1996
Year Published 1996
Report Number EPA/600/A-96/001 ;NHEERL-NAR-1723;
Stock Number PB96-143524
Additional Subjects Dredged materials ; Environmental transport ; Deep water ; Shallow water ; Particulates ; Particle size ; Bulk density ; Marine disposal ; Sediment transport ; Sedimentation ; Sediment-water interfaces ; Water pollution ; Benthos ; Mathematical models ; Reprints ; DIFID model ; Water column
Library Call Number Additional Info Location Last
NTIS  PB96-143524 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
Modifications have been made to the model for Disposal From an Instantaneous Dump (DIFID), commonly used to simulated transport and fate of dredged material rapidly disposal from a dredge or barge into aquatic systems. Changes include simulation of particulate and contaminant detachment from the descending cloud into the water column, and detailed representation and simulation of discharge dynamics. The latter include effects of vertical density gradients within the 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. These 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. The model gives reasonable agreement with water-column and benthic results obtained in a field study of disposal into a 12-meter water column.