In recent years, with the development of LiDAR, 3D laser scanners and mobile measurement systems have also been tried to be applied to river surveying. It can scan objects in 3D, so as to quickly obtain high-density 3D coordinates of the target. It is also a data acquisition means of real-time, initiative, non-contact, surface measurement.

With the continuous development of economy and society, the development and construction projects throughout the country are gradually increasing, and the phenomenon of man-made soil erosion has become increasingly prominent. In the quantitative study of soil erosion in development and construction projects, some measurement methods are difficult to meet the relevant requirements at this stage. With the development and popularization of high technology, 3D laser scanning technology can quickly obtain 3D point cloud data on the surface of scanned objects, generate high-precision and high-resolution digital terrain models, etc., providing new technical means for monitoring of soil and water conservation.