Numerical simulation method for predicting a flood hydrograph due to progressive failure of a landslide dam

Abstract Reducing the damage due to landslide dam failures requires prediction of flood hydrographs. Although progressive failure is one main modes dams, no method available. This study develops a for predicting failure. The proposed consists model and overtopping erosion model. can reproduce collapse progression from toe predict longitudinal shape reservoir water level when overflows. uses these predicted values as new initial conditions reproduces processes an flow in order hydrograph after includes physical models representing intermittent slope, seepage dam, surface on slope. characterizes It considers stabilization effect whereby deposits support steep decreases are transported downstream. Such consideration allows express intermittent, not continuous, occurrences collapses. Field experiments were conducted validate method. successfully reproduced experimental results toe. Using value by model, started overflow.