AI Article Synopsis
- Drilling discharges are complex mixtures of fluids, chemicals, and particulates that can harm benthic communities in the marine environment.
- A numerical model has been developed to assess the fate of these discharges and the environmental risks associated with them, focusing on stressors like oxygen depletion and toxicity.
- The model incorporates processes like natural burial and biodegradation, and uses diagenetic equations to quantify risks, implemented within the DREAM and OSCAR models at SINTEF in Norway.
Article Abstract
Drilling discharges are complex mixtures of base-fluids, chemicals and particulates, and may, after discharge to the marine environment, result in adverse effects on benthic communities. A numerical model was developed to estimate the fate of drilling discharges in the marine environment, and associated environmental risks. Environmental risk from deposited drilling waste in marine sediments is generally caused by four types of stressors: oxygen depletion, toxicity, burial and change of grain size. In order to properly model these stressors, natural burial, biodegradation and bioturbation processes were also included. Diagenetic equations provide the basis for quantifying environmental risk. These equations are solved numerically by an implicit-central differencing scheme. The sediment model described here is, together with a fate and risk model focusing on the water column, implemented in the DREAM and OSCAR models, both available within the Marine Environmental Modeling Workbench (MEMW) at SINTEF in Trondheim, Norway.
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| http://dx.doi.org/10.1016/j.marpolbul.2015.07.019 | DOI Listing |
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