Geographia Polonica (2009) vol. 82, iss. 1
Two Dimensional Modelling of the Flood Zones in the Vistula River Valley in Warsaw
Geographia Polonica (2009) vol. 82, iss. 1, pp. 79-88
When estimating the reach of the fl ood zones, a mathematical model that describesthe fl ood wave propagation, as well as the digital elevation models can be used. In this study,a two step approach has been applied. In the fi rst step, in order to fi nd the most relevantfl ooding areas, a one dimensional hydraulic model HEC-RAS has been used, which assumessteady state fl ow conditions and a discharge of Qp1% = 7210 m3/s and Q p 0.1%= 9960 m3/s.The segment of the Vistula Valley analysed is 47.05 km long. In the second step, a smallerarea has been analysed using the 2D hydraulic model of shallow water fl ow which is based onthe Roe scheme of fi nite volume method.
, University of Warsaw, Hydrology Department, Krakowskie Przedmieście 30, 00-927 Warszawa, Poland
, Faculty of Geography and Regional Studies, University of Warsaw Krakowskie Przedmieście 30, 00-927 Warszawa, Poland
, Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, Narutowicza 11/12, 80-952 Gdańsk, Poland