ИСТИНА

The relief of the Kamchatka peninsula, closeness to the ocean and large amount of snow create favorable conditions for intense avalanche activity. Despite the low absolute heights in the city of Petropavlovsk-Kamchatsky a large number of avalanches come down, which cause significant damage. Based on the analysis of the relief of the city, 143 avalanche release zones were identified and mapped. The main morphometric parameters of the release zones were calculated using DEM. To automate the calculations of the avalanche dynamic parameters, a script was written in Python. Using the written script, calculations of avalanche dynamic parameters for all defined avalanche catchment areas were made. Based on the results of the calculations, an avalanche hazard map and a map of avalanche with volumes of 100 years return period were compiled. Avalanches in the city of Petropavlovsk-Kamchatsky threaten numerous infrastructure facilities: residential buildings, office buildings, etc. Avalanches were also simulated in RAMMS numerical model. According to the obtained results the avalanche hazard zoning was proposed and it was found that numerous objects of infrastructure were in effect located in the red zone with high degree of avalanche hazard. The results of the thesis could contribute to the improvement of the actual territorial zoning precision, and constitute an important step towards the construction of effective safety recommendations for all types of activities in the city.