Model and Assessment of the Contribution of Dredged Material Disposal to Sea-Surface Contamination in Puget Sound
BATTELLE PACIFIC NORTHWEST LABS RICHLAND WA
Pagination or Media Count:
Hydrophobic or floatable materials released to the water column during dredge disposal operations may accumulate in high concentrations on the water surface. If such surface accumulations occur, they could impact the reproduction of fish and shellfish with neustonic floating eggs or larvae. Also, floatable surface contaminants could deposit on nearby beaches. In order to examine the potential impacts of such processes, an interactive computer IBM PC model was developed. The FORTRAN model, allows input of contaminant concentrations on the dredge material, the surface area of the disposal site, the floatable fraction of the contaminated material, and the baseline concentrations of contaminants present in the sea-surface microlayer. The model then computes the resultant concentrations of each contaminant in the microlayer and the potential impact on floating fish eggs. The utility of the model would be greatly improved by empirical data, not yet available, on the vertical upward and lateral movement of contaminants during dredge material disposal.
- Water Pollution and Control