Rainfall flood disaster process evaluation device and method based on similarity theory

The invention discloses a rainfall flood disaster process evaluation method based on a similarity theory. A rainfall facility and a runoff platform are included. The method comprises the steps of rainfall facility manufacturing and test terrain laying. The rainfall facility is used for simulating artificial rainfall, the rainfall intensity of each rainfall plate is controlled by manually adjustingand controlling the opening degree of a ball valve, 3D printing modeling is adopted for the experimental terrain, and the scale elevation experimental environment required by the test is guaranteed;different roughness rates and infiltration rates of different land utilization types of the test terrain are ensured by adjusting the smoothness degree and porosity of the surface of the underlying surface platform; according to the rainfall flood disaster process simulation method based on the similarity theory, the actual rainfall process (spatial inconsistent non-uniform rainfall) can be automatically controlled, the ex