The limitation of previous research method is the lack of systematic study in
dynamic monitoring of changes of geomorphic
characteristics(including land use patterns).
Dynamic monitoring of the changes of geomorphic
characteristics and land use patterns plays the role that the water and sediment monitoring cannot be a proxy for it to the even more comprehensive understanding of the surface erosion processes and impact of human activities by the relevant departments, and is also one of the key research topics.With the constant improvement in remote sensing and computer software techniques,the combination of 3D dynamic landforms and land use patterns with soil erosion process serves as an important interdisciplinary research direction.According to five-phase large-scale airphotos of small catchment of Wangjiagou in west Shanxi(from 1959 to 1999),based on the preparation of digital elevation model (DEM) and digital orthophoto map (DOM),the dynamic monitoring targeted at geomorphic characteristics in combination with water-sediment changes has been conducted in the past 40 years so as to provide basic information for geomorphic evolution and ground surface erosion process.