Published on 21 April 2019
Features of the torrential processes happening on the territory of Greater Caucasus are investigated. A brief description of the geomorphologic structure of the Greater Caucasus is given. It was established that the combination of favorable morph-tectonic, geo-morphological, climatic, litho-logical and other conditions for the passing of gravitational-fluvial processes created the prerequisites for the dominance of processes such as mudflows, which are often repeated and lead to catastrophic consequences. From the analysis of the data on the mudflow-forming precipitation, it is established that the mudflows on the territory of the republic are formed with precipitation in the amount of 20 mm and more per day. The extreme values of mudflow-forming rains on the southern slope of the Greater Caucasus are 20–188 mm, but in the region of the north–eastern slope of the Greater Caucasus and Gobustan 20–132 mm. To estimate the synoptic situations leading to the formation of mudflows, the classification of atmospheric circulation types according to Dzerdzeevsky B.L. was also used. It was established that the mudflows in Azerbaijan are mainly formed under the subtype 12a (subtype of the northern meridional circulation) and 13l (the subtype of the southern meridional circulation, which prevails in the summer). As a result, based on the interpretation of aerospace images (ASI), a map-scheme of the mudflow hazard was drawn up on the 5-point scale within the Azerbaijani part of the Greater Caucasus, where zones with a high (once in 2–3 years, 1 strong mudflow are possible) — V, with an average (once in 3–5 years, 1 strong mudflow is possible) — IV, with a weak (once in 5–10 years, 1 strong mudflow is possible) — III, with a potential mudflow hazard — II and where no mudflow processes are observed — I.
Tags: антропогенный фактор, сель, катастрофа, экзодинамические процессы, метеорологический фактор, типы циркуляции
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)