Sub-grid scale parameterisation of 2D hydrodynamic models of inundation in the urban area

• Autorzy: Néelz S. , Pender G.
• Języki publikacji: EN

Abstrakty

EN

This paper presents preliminary results from a study considering the parameterisation of coarse-grid 2D flood models to take into account sub-grid scale flow patterns occurring in the urban area. A simulation of a severe flood in an urbanized coastal floodplain is first run using a fine grid that can resolve the flow around and between buildings. Next, the same model is run again using the same underlying topography, although stripped from any buildings, and a set of 7 values of the roughness parameter (Manning’s n), all larger than (or equal to) the value used in the original run. A further set of simulations is carried out using a five-fold in-creased grid cell size. It is found that while it may be possible to model the overall effects of the buildings using strongly increased roughness parameter values, using a coarse grid otherwise has implications related to the loss of information about the site topography that results in flood flow routes being incorrectly modelled.

Słowa kluczowe

EN

urban flood modelling; roughness parameterisation; 2D hydrodynamic models

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2007
• Tom: Vol. 55, no. 1
• Strony: 65--72

Twórcy

autor

Néelz S.

autor

Pender G.

• Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK,

Bibliografia

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