Levee Breaching: A New Extension to the LISFLOOD-FP Model

摘要: Levee failures due to floods often cause considerable economic damage and life losses in inundated dike-protected areas, significantly change flood hazard upstream downstream the breach location during event. We present a new extension for LISFLOOD-FP hydrodynamic model which allows levee breaching along embankments fully two-dimensional (2D) mode. Our simulations 2D structured grid models at different scales hydraulic loads computationally efficient manner. A series of tests performed on synthetic historic events scale magnitude show that module is numerically stable reliable. simulated breaches terrain using unsteady flow as an boundary condition compared outcomes with identical setup full-momentum solver. The showed differences maximum through between two were less than 1%, while small-scale event Secchia River (Italy), it was underestimated by 7% reference study. large extreme simulation Po (Italy) resulted 83% accuracy (critical success index).