The knowledge base contains a database of facts and a series of IF - THEN rule statements that include all of the questions a typical user may ask. The rules can incorporate and process judgment, experience, empirical rules of thumb, intuition, and other expertise as well as proven functional relationships and experimental evidence. A KBES such as DREDGABL uses expertly derived rules for its solutions. Download BRAMS ( includes BEST, TT, and FR tools)Ī knowledge-based expert system (KBES) that provides an expert evaluation of the dredgeability characteristics of specific sediments whose geotechnical properties are described in the dredging contract documents.Dredged Material Management Guide (PDF).The FR model is an experimental tool for exploring probabilistic exposure and bioaccumulation for migratory and wide-ranging species. The TT model estimates expected concentrations in fish using a sediment-based food-web model for organic compounds, via trophic transfer factors from invertebrates to fish for certain metals, and via bioconcentration factors from water to fish for the remaining metals and hydrophilic organic compounds. The BEST tool estimates expected risks to human receptors by (1) calculating the edible tissue concentration in human diet species including invertebrate test organisms and their predators based on results of 28-day bioaccumulation testing, (2) calculating an average daily dose to humans that consume these species, and (3) using standard USEPA risk equations to determine potential carcinogenic and non-carcinogenic risks. The BRAMS is an executable program that contains three separate tools, the Bioaccumulation Evaluation Screening Tool (BEST), Trophic Trace (TT) and FishRand (FR). Contact Information for D2M2īioaccumulation Risk Assessment Modeling System (BRAMS) The three modules, the Geographical Information System (GIS), Linear Programming System (LPS), and Decision Support System (DSS), allow managers to create sites and routes in GIS, enter system properties and preferences and calculate optimal dredging networks, and explore and rank dredging options using a multi-criteria decision analysis, respectively. The D2M2 software package includes a suite of three modules meant to identify optimal dredged material management solutions given user-specified inputs about the sites, links, equipment and decision-making criteria such as cost and environmental benefit. It optimizes management value under multiple considerations, including sediment type, dredging equipment, transportation paths, storage needs, material use, environmental concerns and other factors. It effectively analyzes up to millions of combinations of dredging and placement sites to find optimal allocations of specific volumes of dredged material between sites. The D2M2 model is a management tool that identifies optimal networks of dredging, transfer, and disposal sites to inform dredged material management plans.
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