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ANALYSIS OF EROSION PROCESSES IN SETTLEMENTS OF THE MIDDLE OB REGION
Abstract
The study of erosion processes in settlements is a pressing issue since they develop rapidly sometimes. The purpose of this study is, however, to identify the dynamics of erosion activity in settlements of the Middle Ob region. The study objectives are focused on identification of hazardous areas, which is necessary for making informed decisions related to well-minded bank protection. The targets of the study were settlements of the Middle Ob region (Pasol, Vata, Vysoky Mys villages) within the latitudinal stream course of the Ob river between 60° and 62° N and between 69° and 78° E, where erosion processes become apparent. Research methods are based on field surveys with the use of satellite-based land surveying and remote sensing. The data obtained in the course of the study show that within the key area of Pasol village, 137.73 m is exposed to erosion . According to the survey results in 2019, the area washout grew up at the beginning of the village by 2.95 m with an average annual value of 0.51 m/year. This indicates an increase in annual rates, since in 2018, the maximum value was 0.97 m, and the average annual rate was 0.33 m/year. For Vata village, there is a change in the bank line near the cemetery (Point 5) and in Point 2. According to the satellite-based land surveying data for the period from 2016 to 2019, 11,958 m2 was washed out. In Vysoky Mys village, the bank retreats and gullying processes run with an average annual rate of 0.29 m/year. They try to defy this erosion process by soil filling, which usually leads to an increase in linear and sheet wash.
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References5
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