Ripples occur when a drop of water falls on the surface of water.It is a kind of wave diffusion. The density of water and the distance between banks are all factors that affect the speed of ripple diffusion. However, the depth of water below the water level is the most important factor that affects the speed of ripple diffusion. “continuous plane” shows the change in the time axis of the ripples caused by the water drop. The number marked in the title is the size and depth of the water area generated by the preset ripples in the calculation model. Under different conditions, the diffusion speed is completely different, and the three-dimensional model on the time axis is also completely different.