Published on 09 April 2017
According to the Federal target program on development of resorts of the North Caucasus it is supposed to create a year-round tourist and recreational complex “Mamison” in the Republic of the North Ossetia-Alania The aim of the given part of the article is to study avalanche processes on the territory of “Mamison” complex. Climate and orography of the territory of the tourist and recreational complex “Mamison” contribute to development of avalanching processes. Duration of winter period is 111-152 days, during which the accumulated negative temperatures change from – 3700 to – 7600. Stable snow cover is formed in December 15-17, and at the height of 2000-2200 m – in the third decade of November. Duration of its accumulation is from 60 days to 4 months. Average snow height does not exceed 16 cm for foothill regions. In the mountains, snow cover can reach 2-3 m or more. Methods of avalanche hazard assessment are made on the basis of processing and analysis: – Research materials and studies of past years about the conditions of dangerous processes development on studied and surrounding areas; – Results of route observations; – Decoding of satellite images obtained from the annual surveys in the period of maximum snow melt from 2000 to 2015. According to the results of field works interpretation of satellite images were developed maps of avalanches boundaries (M: 10000) and created a database of their morphometric characteristics. Results of the work revealed: 1. 143 avalanche sites. Avalanches manifestation activity is characterized by high altitude and seasonal dynamics. 2. Spring and summer avalanche in different altitudinal zones, starting from the 2800-2900 m altitude watersheds in April, gradually reaching the areas with the highest peaks. 3. By volume dominated by an avalanche from a few hundreds to 1-2 m3. The maximum volume of avalanches among the recorded during the survey is 50000 m3. Basically, all the avalanches accumulated on the slopes without going to the bottom of valleys. Conclusions. In general, infestation of the researched territory by snow avalanches can be assessed as exceptional. Total area with avalanche activity is 41.8 km2 . Totally were identified 75 avalanche catchment areas in the valley of Kozydon river, 86 – in the valley of Zemegondon river. 2 avalanche basins were revealed In the valley of Zemegondon river, 46 avalanche catchment areas in Dzuarikomdon river, 21 avalanche catchment areas in Hitsanshtandon river. Multiple formation centres of avalanches of the right slope are united into 12 avalanche catchments in the valley of Hitsanshtandon river.
Tags: лавины, гляциальные процессы, бассейн, ледник Козыдон, ледник Земегондон, космоснимок, карта., лавинный очаг, объемы лавин, зона транзита лавин
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)