Abstract: Firstly, processing geometric rectification and image matching of two images, then using Two-color Multiview method to extract the characteristics of the images, and comparatively analyzing the change rate of water size on the images, water size change rate of non-subsidence area, and water size change rate of sinking area, the existence of sinking area can be interpreted. After analyzing the former three change rates and the most optimized water size, the conclusion can be made, there is possible of water accumulation in sinking area when it goes down by two meters during flood season.