Plain flooding: near field and far field simulations

by G. Braschi, Univ of Pavia, Pavia, Italy,
F. Dadone, Univ of Pavia, Pavia, Italy,
M. Gallati, Univ of Pavia, Pavia, Italy,

Document Type: Proceeding Paper

Part of: Modelling of Flood Propagation Over Initially Dry Areas


The paper deals with the problems met in the attempt of simulating the plain submersion produced by a levee breaking in the inertia dominated region (near field), scaling with the typical breach dimension, and in the far field, scaling with the typical plain length, where the flow is essentially controlled by the bottom topography. A fractional step algorithm based on a 1D decomposition strategy and just designed to deal with transcritical flows is presented. It is employed to get the near field simulation of the plain flooding due to a sudden wall gate opening; the results are compared to laboratory data. Some far field real world simulations are finally presented.

Subject Headings: Flood plains | Algorithms | Levees and dikes | Flow simulation | Dam failures | Topography | Simulation models

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