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,,
Nikora, V.
Engineering Department, University of Aberdeen, King’s College, Scotland, UK,,
Majewski, W.
Institute of Meteorology and Water Management, ul. Podleśna 61, 01-673 Warszawa, Poland,,
Aberle, J.
Leichtweiss-Institute for Hydraulic Engineering, Technical University of Braunschweig, Beethovenstr. 51, 38106 Braunschweig, Germany,,
Dittrich, A.
Leichtweiss-Institut of Hydraulic Engineering (LWI), Department of Hydraulic Engineering, Beethovenstrasse 51a, 38106 Braunschweig, Germany,,
Brovchenko, I.
Ukrainian Center of Environmental and Water Projects Glushkova Prospect 42, 03187, Kiev, Ukraine,,
Demchenko, N.
Atlantic Branch of P.P. Shirshov Institute of Oceanology Russian Academy of Sciences Prospect Mira 1, 236000 Kaliningrad, Russia,,
Néelz, S.
Heriot-Watt University, Riccarton, Edinburgh, EH14 4AS, 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

: Bates, P.D., and A.P.J. De Roo, 2000, A simple raster-based model for flood inundation simulation, J. Hydrol. 236, 54-77.
Cobby, D.M., D.C. Mason, M.S. Horritt and P.D. Bates, 2003, Two-dimensional hydraulic flood modelling using a finite-element mesh decomposed according to vegetation and topographic features derived from airborne scanning laser altimetry, Hydrological Processes 17, 10, 1979-2000.
Gomes Pereira, L.M., and R.J. Wicherson, 1999, Suitability of laser data for deriving geographical information. A case study in the context of management of fluvial zones, ISPRS Journal of Photogrammetry and Remote Sensing 54, 105-114.
Stelling, G.S., 1984, On the construction of computational methods for shallow water flow problems, Rijkswaterstaat Communications 35, The Hague, Netherlands.
Wicks, J., B. Syme, M. Hassan, B. Lin and O. Tarrant, 2004, 2D modelling of floodplains – is it worth the effort? River and Coastal Flooding Conference, DEFRA, UK.
Yu, D., and S. Lane, 2006, Urban fluvial flood modelling using a two-dimensional diffusionwave treatment, part 2: development of a sub-grid-scale treatment, Hydrological Processes 20, 1567-1583.
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