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«IZVESTIYA IRKUTSKOGO GOSUDARSTVENNOGO UNIVERSITETA». SERIYA «NAUKI O ZEMLE»
«THE BULLETIN OF IRKUTSK STATE UNIVERSITY». SERIES «EARTH SCIENCES»
ISSN 2073-3402 (Print)

List of issues > Series «Earth Sciences». 2024. Vol 50

Geomorphometric Analysis of Digital Elevation Model of the Verkhneangarskaya Basin for Identifying and Assessing Dangerous Gravitational Processes

Author(s)
T. A. Borisova, A. N. Beshentsev, S. A. Petrov
Abstract
The article presents the results of a comprehensive geomorphological analysis of the relief types of the Verkhneangarskaya depression (Lake Baikal basin) for geoinformation diagnostics of dangerous gravitational processes. The physical and geographical characteristics of the study area are given, tectonic and geological features of relief formation are designated. For metric assessment and subsequent mapping of the relief in the ArcGIS software environment, a digital elevation model (DEM) of the study area and raster coverages of morphometric parameters of slope and aspect were created on the basis of isolines and elevation marks of the topographic base at a scale of 1:100 000. For geomorphometric analysis of the relief model, five representative polygons were selected that characterize similar relief types of arched-block mountains and have the same physical and geographical conditions for the formation and development of gravitational processes. To visualize each polygon, slope and aspect mapping was performed, and a space image was presented. In the process of analysis and geomorphological interpretation of representative polygons, the planned-altitude metric parameters of relief types with similar morphometric characteristics were established, contributing to the formation and development of dangerous gravitational processes and determining the conditions and risks of economic activity in mountainous areas: high-mountain erosion-exaration, high-mountain denudation-erosion, mid-mountain erosion-denudation, mid-mountain denudationerosion, low-mountain denudation.
About the Authors

Borisova Tatyana Anatolyevna, Candidate of Sciences (Geography), Senior Research Scientist, Baikal Institute of Nature Management SB RAS, 8, Sakhyanova st., Ulan-Ude, 670042, Russian Federation, e-mail: tabor@binm.ru

Beshentsev Andrew Nikolaevich, Doctor of Sciences (Geography), Head of Laboratory, Baikal Institute of Nature Management SB RAS, 8, Sakhyanova st., Ulan-Ude, 670042, Russian Federation, e-mail: abesh@binm.ru

Petrov Sergey Alekseevich, Engineer, Baikal Institute of Nature Management SB RAS, 8, Sakhyanova st., Ulan-Ude, 670042, Russian Federation, e-mail: sergei_petrov13@mail.ru

For citation

Borisova T.A., Beshentsev A.N., Petrov S.A. Geomorphometric Analysis of Digital Elevation Model of the Verkhneangarskaya Basin for Identifying and Assessing Dangerous Gravitational Processes. The Bulletin of Irkutsk State University. Series Earth Sciences, 2024, vol. 50, pp. 3-16. https://doi.org/10.26516/2073-3402.2024.50.3 (in Russian)

Keywords
digital elevation model, relief types, dangerous gravitational processes, geomorphometric analysis.
UDC
911:551.4:528.92.23(282.256.341.1)
DOI
https://doi.org/10.26516/2073-3402.2024.50.3
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