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A long-term water quality management model for a lignite mining affected river catchment area.

The paper presents a program system which is used for long-term planning and control of water management of an open-cast mining affected river catchment area. This contribution gives insight into the development of a coupled stochastic water management - water quality model. Simplified algorithms to describe water quality are presented. Finally, applicability of the model is verified by some results which are interpreted with regard to the special water quality situation in the Lusatian mining district.