The Irkutsk reservoir is part of a system of hydropower Angara-Yenisei cascade, is located in the valley of the Angara river from its source (Lake Baikal) to Irkutsk (Irkutsk HPPs). The construction of hydroelectric power stations on the river and the filling of reservoirs led to a sharp change in the hydrogeological conditions of the territory. In the coastal zone, there is an active development of erosion processes, which depend on both the geological features, hydro-climatic conditions of the territory, and anthropogenic impact. Erosion processes in the coastal zone of the Irkutsk reservoir lead to coastal erosion and land loss. Localities, agricultural lands, and woodlands fall into the zone of erosion of the reservoir's coast. At the same time, the coastal zone of the reservoir continues to be intensively developed. Not only is the area of existing settlements in the coastal zone expanding, but also the number of dacha and horticultural plots, camp sites, and hotels is increasing. In the circumstancesit is necessary to identify areas with the most pronounced erosion processes and relatively stable, safe for use. During the study of the coastal territory, it was found that the maximum destruction of the coast occurs in the area of the pos. Patroni, where the value of the Bank's brow retreat over 11 years (from 2006 to 2017) was 59.6 m. The lowest values are observed in the area of the SNT Polytechnic, where the value of the Bank edge retreat over the considered period was 31.8 meters. In recent years, there has been a decrease in the rate of coastal erosion associated with a decrease in the water level in the reservoir. The study used historical, comparative geographical, field, remote, cartographic methods, data from the archive of the Federal State Institution Vostsibregionvodkhoz, remote sensing (satellite imagery from DigitalGlobe), field materials. The article considers the factors of erosion processes on the banks of the Irkutsk reservoir and provides both quantitative and cartographic assessment of their effect on the selected three sites using remote sensing data.

Solpina Nina Gavrilovna, Candidate of Sciences (Geography), Associate Professor, Department of Geography, Cartography and Geosystem Technology, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: ninacolpina@yandex.ru 

Cherkashina Anastasia Aleksandrovna, Master, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: ferrero94@mail.ru

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