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Risks of stability of transport systems in the Western sector of the cryolithozone of Russia with the development of dangerous cryogenic processesтезисы доклада
- Автор: Iurov F.D.
- Сборник: American Geophysical Union (AGU) 2021 Fall Meeting
- Тезисы
- Год издания: 2021
- Издательство: AGU Publications
- Местоположение издательства: Вашингтон
- Номер статьи: GC55E-0479
- Аннотация: The western sector of the Russian Arctic is a promising and quite actively developing region, which is due to its importance for the fuel and energy complex of Russia and Western Europe. For the stable functioning of the region, it is necessary to create and ensure the stability of an extensive network of transport infrastructure.In permafrost-geological terms, the studied region has an extremely heterogeneous structure. The permafrost thickness and its distribution (from isolated patches to continuous), the depth of seasonal thawing, ice content and other parameters vary a lot. Beyond that, the region is heterogeneous in terms of terrain, there are parts of mountain and lowland permafrost.The most dangerous groups of cryogenic processes for the linear infrastructure were selected: frost cracking, icing, frost heaving, slope processes, thermal erosion and thermal abrasion of the shores, thermokarst. The risk assessment was carried out according to three main indicators: the degree of affection by the cryogenic process of the territory of the laying of transport routes, the duration of exposure and the probability of their activisation. The product of these indicators allowed us to obtain a relative degree of risk from the effects of cryogenic processes.Studies have shown that the complex of cryogenic processes that are dangerous for the transport infrastructure is directly related to the landscape-permafrost and engineering-geological conditions of the territory. For example, thermokarst is the most dangerous for linear objects in the northern part of the Yamal Peninsula, where highly ice rich soils are common. There, the risk level is estimated at 0.08 (high risk), while in foothill areas where rocks lie close to the surface (for example, in the area of the village of Harp), this indicator is only 0.0006. In turn, in the area of the Polar Ural, the danger to the linear infrastructure is extremely high with the activisation of slope processes (0.003 for the settlements of Harp and Yeletsky), while in the flat territories (Tarko-Sale, Labytnangi, Novy Urengoy, etc.), the risk index for the activation of cryogenic landslides and kurums is actually 0.
- Добавил в систему: Юров Федор Дмитриевич