Геоморфометрический анализ рельефа Приольхонья

Abstract

The use of geomorphometric analysis to obtain relevant data and their interpretation in geomorphological and geographical studies is becoming more widespread in recent times. In this study, such an analysis is used for the Priolkhonsky plateau (Western Baikal region), whose territory has recently been subjected to intense recreational impact. Under such conditions, it becomes relevant to determine the erosion-accumulative potential of the territory, its subsequent regionalization, as well as the possibility of using the obtained results in landscape-recreational zoning. The surface curvature maps were made using a digital elevation model based on ALOS data with a resolution of 30 m. Using geoinformation analysis, slope steepness, horizontal, vertical, and general curvature maps were obtained, and statistical coefficients of these indicators for the study area were determined. A geomorphological interpretation of the areas spatial distribution with different values of curvature was carried out. The analysis of the territory geomorphometric parameters showed that denudation processes prevail within the study area. It was also determined that the territory under favorable climatic conditions could have a significant potential for the development of erosion-accumulative processes. Areas of accumulation associated with the development of linear erosion forms, gullies along unpaved roads, were identified. Areas with the maximum values of curvature in the summit level of the relief have a high potential for the development of landslide processes. In the middle level of relief with positive values of the total curvature, prevail low-intensity processes (downwash, creeping).