Gis application in analysis of natural conditions for the genesis of torrents in territory of LOEQ ''Vlasina"

Abstract

In this paper predisposition of the terrain for the emergence of torrents by application of Geographic Informational Systems (GIS) was made. Due to great ecological importance of this area, it is necessary to continuously monitor the state of the environment. High rainfall over a short period of time is the main cause of torrential floods, and because of the high elevation of Vlasina, the average annual rainfall exceeds 800 mm. The method used to determine the predisposition of a landscape of exceptional qualities (LOEQ) "Vlasina" on occurrence of torrential flood is the Flash Flood Potential Index (FFPI). To identify the possibility of torrential floods occurence, natural conditions were analyzed: slope of the terrain, types of geological substrate, vegetation density and the way the land use. Using the GIS tool, a map of the susceptibility of terrain to the occurrence of torrents in the territory of LOEQ "Vlasina" was obtained, and the classification of rivers was made based on the probability of occurrence of torrential floods on them.