Search
You are here: Articles
Articles

Published on 25 April 2020

QUANTITATIVE EVALUATION OF DIFFERENT AREAS ANTHROPOGENIC DISTURBANCES IN PRIOL’KHONIE AND ITS CONNECTION WITH WATER EROSION

V. A. Karavaev, M. J. Opekunova, S. V. Solodiankina, Yu. V. Vanteeva

Aim. Over the past decades, the recreational load in Priol’khonie has increased significantly, numerous new rec-reation centers have been built, which led to the expansion of the road network – since 1982, it has increased here by almost 13 times. Its growth contributed to the intensification of water erosion and deflation. In this regard, it is important to determine the dependencies of the development and activation of linear erosion on the intensity of the recreation impact of the Priol’khonie. Two study areas are selected for analysis that clearly differed in the degree of anthropogenic disturbance - highly developed, adjacent to Bazarnaya Bay and poorly de-veloped, which is located on the shore of Tutai Bay.
Research methods. The disturbance of the territory are estimated by the length of the roads, the density of the road network, the number, and area of housing, including, separately, intended for the reception of tourists. To obtain quantitative data, high-resolution space images of free access are used. During the fieldwork, the landscape descriptions of test plots in different landforms, accounting and description of linear erosion forms, installation of benchmarks  were made, also orthophoto maps were compiled using the the quadrocopter survey.
Research results. The area of the Tutay Bay is one and a half times larger than that of the Bazarnaya Bay and, with equal length of roads, the density of road network on the first study area out to be one and a half times lower than on the second. The area occupied by recreation facilities on TutaiBay is 1.75 times less than in the BazarnayaBay; the building density is three times lower.
Conclusions. The study showed that the main reason for the development of linear erosion in the Priol'khonie is the combination of natural geological and morphological conditions (thin loose deposits and light-textured soil with a shortened profile) with anthropogenic effects (spontaneous development of the road network) and, as a result, disturbance and destruction of the vegetation cover. In this case, the vegetation cover is a critical factor, since when it is disturbed in conditions of heavy rainfall, erosion processes intensify very quickly, as observations have shown in Tutai Bay.

CityMoscow, Irkutsk
CountryRussia
UDC551.3 / 911.2 (571.53)
Issue2020, № 1 (Т. 12)
Key wordsrecreation impact, road network, building density.
Number of views (208)

Categories: Articles

Tags: рекреационная нагрузка, дорожная сеть, плотность застройки, Приольхонье, промоины.

Print
SEARCH (ON AUTHORS OR ARTICLES)
Search the Issue

ISSN 1998-4502 (Print)                                                            ISSN 2499-975Х (Online)