The Geosystems of the Tunkinskaya Depression
Yu. M. Semenov, A. V. Silaev
The paper considers the results of medium-scale landscape mapping of the Tunkinskaya depression, a map of geosystems is given therewith. The works were carried out using the methods of geoinformation mapping and modeling, processing and analysis of space images in combination with field studies. The mapping technique was based on the theory of geosystems by V. B. Sochava and his followers. The mapped unit was a group of facies. The association of facies groups into higher landscape taxons was performed according to the hierarchical classification of geosystems. The differentiation of the geosystems of the depression is determined by microclimatic and lithodynamic features of the territory, by the nature of soil and vegetation cover. The patterns of the landscape structure formation are determined by the asymmetry of the concentric altitudinal zonality and the topological features of the manifestation of relief formation processes. The differences between the classes of facies within a geom depend on the moistening degree of geosystems. Groups of facies were united into facies classes in accordance with the steepness of slopes, the relief subdivision degree and the soil moistening degree. The boundaries of geosystems units of the mountain framing of depression determine the height indices above the sea level and surface slopes, and the boundaries of the depression geosystems determine the levels of groundwater occurrence or river pressure water. The landscape structure of the territory is represented by geosystems of 51 groups of facies. In the map legend they are grouped into 13 classes of facies, 4 geomes and 2 groups of geomes.
geosystems, Tunkinskaya depression, mapping, landscape structure, groups of facies, geoms
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