In recent decades, climate change and human activities increasingly impact rivers, which could provoke or enhance the dangerous riverbed processes, e.g. riverbank erosion. The availability of satellite images with global coverage provides ample opportunities for the study of horizontal channel deformations and their quantitative assessment. This became the basis for an active development of remote sensing methods that could be widely used for all the variety of river sizes and their channel types. The article deals with the general analysis of dangerous fluvial processes (ri verbank erosion) on the lowland rivers of Western Siberia using modern methods of their investigation. Satellite images of CORONA, Landsat and Sentinel were used for the analysis, which make it possible to detail changes in banks with high accuracy by applying both traditional (manual) and semi-automated GIS tools-based methods of image interpretation and digitizing. The results showed that the rate of stream-bank erosion varies depending on the natural conditions of riverbed formation, the hydrological conditions and the river size. The rate of stream-bank erosion on the Ob and Irtysh rivers varies primarily due to the local factors, such as the dispersion of runoff in the branches, the influence of indigenous banks, the spread of channel types and morphologically homogeneous areas, the parameters of their shapes, etc. The highest erosion rates (2-3 m/year or more) among the large and medium-size rivers were recorded for the Tom and Chulym rivers. But in general, the rivers of Western Siberia are characterized by relatively low stream-bank erosion rates, which is due to the natural features of the region.
Куракова et al. (Wed,) studied this question.