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Two-dimensional hydrodynamic surface model

A hydrodynamic surface model can be coupled with a 2D surface model to provide a more accurate image of the dynamics of surface runoff in extreme rainfall events. A 2D surface model can describe surface runoff more precisely than a 1D model, but it is also considerably more calculation-intensive. The most common input data for the surface models are elevation models based on aerial surveys or other detailed elevation models with grid sizes between 1 and 4m. The surface model is adjusted using polygons for houses, roads, etc., included at their physically correct location in the model.


Senest redigeret: 05-02-2014