Abstract
Summary The migration of the heavy metals Cd, Zn, Cu, Cr and As from harbour sludge dumps into an underlying soil‐groundwater system can be calculated with the chemical model CHARON. This model is described briefly. The processes with respect to heavy metals are treated with some more detail. The results of two case studies show, that the behaviour of the metals may vary to a large extent from one case to another, mainly dependent on the hydrological, geological and geochemical characteristics of the soil‐groundwater system. Despite inevitable inaccuracies in model inputs CHARON has proved to be a useful tool for the assessment of groundwater pollution.
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