Journal : Acta Geophysica
Article : Sub-grid scale parameterisation of 2D hydrodynamic models of inundation in the urban area

Authors :
Rowiński, P.
Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01-452 Warszawa, Poland, pawelr@igf.edu.pl,
Nikora, V.
Engineering Department, University of Aberdeen, King’s College, Scotland, UK, v.nikora@abdn.ac.uk,
Majewski, W.
Institute of Meteorology and Water Management, ul. Podleśna 61, 01-673 Warszawa, Poland, Wojciech_Majewski@imgw.pl,
Aberle, J.
Leichtweiss-Institute for Hydraulic Engineering, Technical University of Braunschweig, Beethovenstr. 51, 38106 Braunschweig, Germany, j.aberle@tu-bs.de,
Dittrich, A.
Leichtweiss-Institut of Hydraulic Engineering (LWI), Department of Hydraulic Engineering, Beethovenstrasse 51a, 38106 Braunschweig, Germany, a.dittrich@tu-bs.de,
Brovchenko, I.
Ukrainian Center of Environmental and Water Projects Glushkova Prospect 42, 03187, Kiev, Ukraine, brovchik@env.kiev.ua,
Demchenko, N.
Atlantic Branch of P.P. Shirshov Institute of Oceanology Russian Academy of Sciences Prospect Mira 1, 236000 Kaliningrad, Russia, ndemchenko@mail.ru,
Néelz, S.
Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, UK, s.p.f.neelz@hw.ac.uk,
Abstract : 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.

Keywords : urban flood modelling, roughness parameterisation, 2D hydrodynamic models,
Publishing house : Instytut Geofizyki PAN
Publication date : 2007
Number : Vol. 55, no. 1
Page : 65 – 72

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DOI :
Qute : Rowiński, P. ,Nikora, V. ,Majewski, W. ,Aberle, J. ,Dittrich, A. ,Brovchenko, I. ,Demchenko, N. ,Néelz, S. ,Néelz, S. , Sub-grid scale parameterisation of 2D hydrodynamic models of inundation in the urban area. Acta Geophysica Vol. 55, no. 1/2007
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