Modelling flood events with a cumulant CO lattice Boltzmann shallow water model

In this work the development of a semiautomatic procedure based on the coupled use of a GIS subroutine and a two-dimensional hydraulic lattice Boltzmann model solving the shallow water equations is presented. A C code implementing the cumulant collision operator and a limiter velocity strategy to model the wave front on a wet–dry bed is discussed and validated against literature test cases. Finally an application to a real test case, the Malpasset dam break, is shown, highlighting the good performances of the model through a comparison with results from surveys and data from literature.