Soils of the Dezhnevka creek pool of the Chulman trough and its transformation after coal mining

Soil cover studies were conducted in the basin of the Dezhnevka stream, a right tributary of the Chulman river, administratively in the Neryungrinsky district of the Republic of Sakha (Yakutia). Since the 1990s, coal mining has been carried out here by open-pit mining, and since 2003 by mine mining. Man-made landscapes have been formed within the mining branch of the Denisovsky GOK of LLC UK KOLMAR. The research area is located in a zone of continuous permafrost distribution, the climate is characterized as sharply continental with long winters and moderately warm short summers. The following types of zonal soils are distinguished in the basin of the Dezhnevka stream of the Chulman depression: permafrost podzolic illuvial-humus, permafrost podzolic illuvial-ferruginous and permafrost-pale-brown and intrazonal: permafrost alluvial sod. These soils are characterized by a light granulometric composition and washing water regime. Data on the process of soil cover restoration in post-technogenic landscapes formed during coal mining in the Chulman depression (South Yakutia) were obtained. The research was carried out on overburden dumps formed in the early 90's. According to the profile-genetic soil classification of technogenic landscapes according to the morphological characteristics selected lumiosity initial class lithogenic undeveloped soils, the initial embryonic soils and organo-accumulative class of biogenic-undeveloped soils and determined their physicochemical properties. These young soils have a high content of organogenic substances that are inherited from the original rocks containing coal. In embryos, after 25-30 years, there is a projective vegetation cover of 60-100% and the accumulation of organic matter on the surface, which indicates an organo-accumulative stage of soil cover restoration, which is reduced to the accumulation of undecomposed plant residues. The application of the grading system according to the degree of transformation and the ability to restore the soil cover revealed that the "Modified" group includes 1.25 ha or less than 1% of technogenic disturbed territories, and the "Highly modified" group includes 168 ha of technogenic disturbed territories.

transformation of soil cover, permafrost soil, embryozems, eluviozems, recovering of soil cover, technogenic landscape, soil formation, Dezhnevka stream, Chulman cavity, southern Yakutia

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