Numerical Simulation of Levee Breaching Due to Overtopping Flows Considering Transition From Bedload to Suspension

Key Points

• This research aims to analyze the erosion process of levees during overtopping and improve prediction models.
• Developed a 3D fluid analysis model that predicts surface and seepage flows.
• Combined sediment transport models considering bedload and suspended load.
• Used simplified models to illustrate the transition from bedload to suspension.
• Conducted hydraulic experiments with sandy soil and large models of cohesive soil.
• The new model accurately reproduces erosion at the toe of the levee compared to traditional models.
• Demonstrated the effectiveness of predicting levee breaching under specific flood conditions.