QUANTITATIVE LAWS OF A MORPOLOGICAL PATTERN FOR ABRASION SLOPES WITN A LANDSLIDE PROCESS WITHIN THE CRYOLITHOZONE (THE COASTS OF THE KANIN AND YAMAL PENINSULAS AS EXAMPLES)  1

A. S. Victorov; Викторов А. С.; T. V. Orlov; Орлов Т. В.; M. V. Arkhipova; Архипова М. В.; V. N. Kapralova; Капралова В. Н.; V. V. Bondar; Бондарь В. В.

doi:10.31857/S294917892303012X

QUANTITATIVE LAWS OF A MORPOLOGICAL PATTERN FOR ABRASION SLOPES WITN A LANDSLIDE PROCESS WITHIN THE CRYOLITHOZONE (THE COASTS OF THE KANIN AND YAMAL PENINSULAS AS EXAMPLES)¹

Authors: Victorov A.S.¹, Orlov T.V.¹, Arkhipova M.V.¹, Kapralova V.N.¹, Bondar V.V.¹
Affiliations:
1. Sergeev Institute of Environmental Geoscience RAS
Issue: Vol 54, No 3 (2023)
Pages: 124-137
Section: RESEARCH METHODS
URL: https://journals.rcsi.science/2949-1789/article/view/140587
DOI: https://doi.org/10.31857/S294917892303012X
EDN: https://elibrary.ru/WETHFU
ID: 140587

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Abstract
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Abstract

Coast landslide processes take a special place in the study and monitoring of processes in permafrost under the climate change, however, not much attention has been paid to the morphology and quantitative characteristics of the landslides. The aim of the work is to reveal quantitative relationships between the abrasion slopes and a landslide process for coasts within the cryolithozone, mainly in contact with the adjacent interfluves. The research is based on the interpretation of high-resolution space imagery at five costal sites of the Kanin and Yamal peninsulas. The study was focused on the morphological features of the upper part of the landslides at the border with the adjacent interfluve. This border is a combination of arc elements. Besides, there are arcuate residual sections of the interfluve surface, corresponding to different stages of landslide process, in some places on the slope. Analysis of the coastline from images gave us such characteristics of landslides as the length of the arcs forming the boundary, the length of the chords of the arcs, the arrows of the arcs, the average radii of curvature, the central angles of the arc, the angles of orientation of the chords with respect to the vector of the general strike of the corresponding section of the coastline. Some of these characteristics were obtained by direct measurement from satellite images, the others by calculation. The analysis included 30 samples with a volume of 103–183 elements. Statistical processing using Pearson’s goodness-of-fit test showed that in the vast majority of the sites, the distributions of the landslide upper boundary arc sizes, chords, arc arrows, and curvature radii, as well as central angles, correspond to a lognormal one. The chord orientations with respect to the strike of the site are normally distributed. The values of the distribution parameters of the studied quantitative characteristics of the landslide morphological features differ and depend on the physical-geographical and engineering-geocryological conditions of specific areas.

Keywords

mathematical morphology, permafrost, landslide processes, space imagery interpretation

References

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