title: BIOCHEM-ORCHESTRA: a tool for evaluating chemical speciation and ecotoxicological impacts of heavy metals on river flood plain systems.
abstract: The chemical speciation model BIOCHEM was extended with ecotoxicological transfer functions for uptake of metals (As, Cd, Cu, Ni, Pb, and Zn) by plants and soil invertebrates. It was coupled to the object-oriented framework ORCHESTRA to achieve a flexible and dynamic decision support system (DSS) to analyse natural or anthropogenic changes that occur in river systems. The DSS uses the chemical characteristics of soils and sediments as input, and calculates speciation and subsequent uptake by biota at various scenarios. Biotic transfer functions were field-validated, and actual hydrological conditions were derived from long-term monitoring data. The DSS was tested for several scenarios that occur in the Meuse catchment areas, such as flooding and sedimentation of riverine sediments on flood plains. Risks are expressed in terms of changes in chemical mobility, and uptake by flood plain key species (flora and fauna).
authors: Institute for Inland Water Management and Waste Water Treatment RIZA, Department of Chemistry & Ecotoxicology, PO Box 17, 8200 AA Lelystad, The Netherlands. jos.vink@rws.nl
authors: J P M
authors: JP
authors: Vink
authors: J C L
authors: JC
authors: Meeussen
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D003661:Decision Support Techniques; D019015:Geologic Sediments; D007448:Invertebrates / Q000378:metabolism; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D010944:Plants / Q000378:metabolism; D018570:Risk Assessment; D045483:Rivers; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D014867:Water / Q000032:analysis
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; D014867:Water; D001151:Arsenic