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Two erosion systems in the river basins on plains and their mutual transformation part 1

, : Two erosion systems in the river basins on plains and their mutual transformation part 1. Geomorfologiya

The investigations of erosion in various landscape zones of the Earth's plains prove the existence of two basic systems of erosion: channel and basin. The principal distinctions of these systems show themselves in the structure of erosion processes and accumulation of their products, in the hydrological regime of rivers, in the character of the dependence of a specific suspended sediment yield on the river basin area, in the structure and thickness of alluvium, in the relation between alluvium and slope sediments, in the dynamics of river channels, in some features of river valleys morphology, in the degree of preservation of relic landforms in the river basin, in the general tendency of relief development (valley partition or planation), and in the intensity of sediment accumulation within the river channels and the flood-plains, ponds, and reservoir, etc. The present river channel system of erosion is divided into two subsystems: one of humid and semi-humid moderate latitudes and one of humid and semi-humid tropical and equatorial latitudes. The present basin system of erosion is also divided into two subsystems: anthropogenic and natural (semi-desert, savanna, and sub-arctic zones).


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