ИСТИНА

Changes in planned figure of river channels - channel deformation, can be dangerous to humans. The danger occurs due to banks destruction and alluvial ridges movement on the bottom of the river. Buildings, which were located on the shores, roads, which were held along the banks, supports of bridges, power lines, pipelines can be destroyed. Sometimes whole streets of villages and towns are washed away by the river. Hazard assessment of river-bed processes is carried out as a high, medium or low, and quantitatively as an average speed of bank erosion, offset of alluvial ridges or integrated in points. For the assessment of the geographical distribution of river-bed processes danger in Russia we used mapping method to show the danger of river-bed processes on the whole territory of the country and in separate river basins. These maps show the regions with increased risk of river-bed processes, average on scale of danger and areas, safe in regard to the erosion of shores and alluvial ridges offset. Detailed characteristics of the hazard, the magnitude of its manifestations and consequences for coastal and fluvial constructions are given in the legend of these maps. The combination of the potential dangers of channel processes at various scales with a real or planned exploration of coastal areas, gives the opportunity to estimate the risk of exploration of rivers and their banks, which are different in river-bed processes hazard potential.