Abstract
This article describes the idea of coupling three site-specific large scale finite element groundwater models. Each independent groundwater model represents one geological unit containing adjacent boundaries. In order to preserve consistency of the simulation results, the exchange rates at the shared borders used to be calculated independently, set up as boundary condition for the adjacent model unit and adjusted in an iterative process. To overcome this time- consuming procedure of generating consistent boundary condition values for the exchange rates, the adjacent boundary nodes of the three models are linked to form a unified model. As a first result it is shown, how the quality of simulation results in the vicinity of shared boundaries increase by the proposed solution.
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