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A novel model approach to bridge the gap between box models and classic 3D models in estuarine systems

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  • Larsen, Janus
  • Mohn, Christian
  • Timmermann, Karen

Abstract

The multiple hydrodynamic and ecological processes characterizing estuarine systems make ecological modelling an essential tool for ecosystem-based management by increasing the understanding of the complex interactions and by quantifying the effects of various natural and anthropogenic pressures. The modelling technique used is dominated by computational simple box model approaches with a low spatial resolution and coupled 3D hydrodynamic-ecological models with high computational requirements. In this paper we present a novel concept (Flexsem) which combines the computational simplicity and condensed hydrodynamics from box models with a high spatial resolution characterizing coupled 3D models. The modelling framework Flexsem is a fast, flexible and user-friendly tool specifically targeted towards scientific and management challenges of the complex biogeochemical processes in coastal zone ecosystems. We use Flexsem to simulate the physical conditions in a typical Danish estuary, Horsens Fjord utilizing unstructured computational meshes to vary the complexity of grid geometry and resolution. The results showed that the model was able to reproduce the physical conditions in the estuary and provide reliable estimates for the tracer residence time.

Suggested Citation

  • Larsen, Janus & Mohn, Christian & Timmermann, Karen, 2013. "A novel model approach to bridge the gap between box models and classic 3D models in estuarine systems," Ecological Modelling, Elsevier, vol. 266(C), pages 19-29.
    • Handle: RePEc:eee:ecomod:v:266:y:2013:i:c:p:19-29
    DOI: 10.1016/j.ecolmodel.2013.06.030
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