LONG-TERM FLUCTUATIONS OF THE MAXIMUM RIVER FLOW OF MOUNTAIN AREAS OF ARMENIA

Very important is the knowledge of the perennial fluctuations of maximum costs, especially in the context of global climate change. The results of long-term fluctuations in absolute maximum costs make it possible to predict in advance the expected water disasters and work out ways to prevent their danger or mitigate them. The work studied, analyzed and identified patterns of perennial fluctuations of the maximum water flow of the rivers of mountainous areas of Armenia in context of global climate change. For this purpose collected, processed and analyzed the results of actual observations of Armhydromet, available literary sources. Used in the work methods: mathematical-statistical, geographical, comparison, analysis. In the study area, the maximum costs are mainly in the period of spring floods and are formed mainly from snowmelt and rainwater, which can occur both separately and together. During the spring floods, which are one of the main stages of the water regime of the rivers of Armenia, a significant part of the annual flow runs along the rivers. As a result of research, it turned out that in the study area there is mainly a tendency to decrease the values of the maximum flow, which is the result of both human activity and climate change. Among the 53 posts studied (out of 84 active posts), in 49 (that is, in 92% cases) there is a tendency to decrease in absolute maximum expenses, only at 4 posts there is a tendency to increase. This is because in the territory of the republic there is an increase in air temperature, an increase in the frequency of thaws in winter, a decrease in the water supply in the snow.