by U.S. Dept. of the Interior, U.S. Geological Survey in [Reston, Va .
Written in English
|Other titles||Predicting the long term fate of sediments and contaminants in Massachusetts Bay.|
|Series||USGS fact sheet -- 172-97., Fact sheet (Geological Survey (U.S.)) -- FS-97-172.|
|Contributions||Geological Survey (U.S.)|
|The Physical Object|
|Pagination||1 folded sheet (6 p.) :|
Predicting the long-term fate of sediments and contaminants in Massachusetts Bay. [Bradford Butman; Geological Survey (U.S.);] -- Where and why contaminants accumulate, and how to make informed management decisions about uses of these coastal areas and for the development of sound strategies for monitoring environmental. Contaminants have accumulated in the sediments of Massachusetts Bay, typical of many coastal areas near major metropolitan centers that have been used for waste disposal since colonial times. Developing an understanding of where and why contaminants accumulate is essential for making informed management decisions about uses of these coastal areas and for developing sound . Yet, for long-term predictions, second order decreasing functions (with an arbitrary assumption of achieving zero concentrations in 30 years) were derived based on SFEI water column concentrations measured in the lower South Bay area. FTHP model parameters and inputs related to congeners and sediment are tabulated in Table CAuthor: Filiz Karakas, Aysegul Aksoy, Ipek Imamoglu. Recent studies have shown that the active layer is one of the most influential, yet least understood, factors that affect the long-term fate of contaminants in the Bay (Davis, ; Greenfield and Davis, ). The depth of the active layer can vary from as little as 3 cm to more than 50 cm (Leahy et al., ). For this study, the model used.
This variability is sig nificant and must be considered in any long-term predictions. The transport and fate of PCBs were investigated with the emphasis on the effects of (a) large flow events, (b) incoming upstream PCB loads, and (c) burial of contaminated sediments by clean sedi ments with subsequent erosion of sediments by a large 1, m 3. effectiveness of the cap over the long term and may also increase consolidation of the underlying sediment bed. Sediment Characteristics The project manager should determine the physical, chemical, and biological characteristics of the contaminated sediment pursuant to using the data quality objective (DQO) process during the. Coastal and estuarine waters receive contaminants via local anthropogenic activities and through riverine inputs. Within these systems, contaminants partition between aqueous (pore water, overlying water) and solid phases (sediment, suspended particulate matter and biota) (Luoma, ).The partitioning behaviour (expressed as a sediment-specific sorption constant: K d) and . Model Prediction of Long-Term Reactive Core Mat Efficacy for Capping Contaminated Aquatic Sediments The Neponset River case study evaluates the long-term effect of sediment RCM capping on reducing the water column PCB concentration. PCB, Hydrologic models, Pollution, Massachusetts, United States Journal of Environmental Engineering. Vol.
1. Introduction Plastics as sediment particles. Plastic pollution in the oceans has attained levels that have captured the attention of the global community (UNEP and GRID-Arendal, ; Borrelle et al., ).Plastic has been found in all parts of the marine ecosystem (Geyer et al., ) from seafood to the most remote environments on Earth including the bottom of the deepest ocean. Processes Influencing the Transport and Fate of Contaminated Sediments in the Coastal Ocean Boston Harbor and Massachusetts Bay Bothner, M.H., and B. Butman (eds.) U.S. Geological Survey Circular , 89 pp, For this reason, models using the "fugacity" concept (uses the partitioning characteristics [Chapter 4] of chemicals as a basis for determining the environmental compartment - air, sediment, water, biota - in which the chemical is primarily found) has proven effective in predicting the environmental pathways and fate of contaminants (Mackay and. Contamination of the environment with plastic debris has received increasing attention from the public, environmentalists, scientists, and policy makers since the s [1, 2].Model predictions suggest that currently over 5 trillion plastic particles float on the ocean surface  and that in alone between and million metric tons of plastic entered the ocean .