Abstract: Provided is a laboratory experiment system including an upstream reservoir. A main river channel is connected to a water outlet of the upstream reservoir. A barrier dam is built up in the main river channel. Uneroded dam bodies are constructed on two side surfaces of the barrier dam. A branch river channel extends on a surface of the barrier dam. A material hopper is connected to a feed inlet of the branch river channel. River banks are constructed on outer sides of the uneroded dam bodies. The feed inlet is docked with a descending conveyor belt. A feeding end of the descending conveyor belt is docked with an ascending conveyor belt. A discharge end of the material hopper defines a bottom hole. The bottom hole is connected to a material pipe. A discharge end of the material pipe corresponds to an inner side of the ascending conveyor belt.

Abstract: The invention provides a calculation method for dike breach development process, which relates to the field of flood disaster prevention. In this method, the influence of hydrodynamic on the development rate of the breach is considered, and the unit discharge of the breach is taken as the main parameter. The parameter expression between the hydrodynamic factors and the development process of the breach is established for both lateral widening and vertical downcutting. According to the invention, the whole development process of dike breach can be calculated with only a few parameters, and the main parameter unit discharge can be directly obtained by the discharge formula of broad crested weir. As the calculation incorporating as much physical mechanism as possible and simple calculation procedure, the method has high practicability, good repeatability and scientificity.