Influence of climate change on the formation of the boundaries of natural zones in the watersheds of the Assa-Talas river basin

Abstract

Based long-term climate data, a research database has been created for eight meteorological stations located in various natural-geographical zones of the Assa-Talas river basin; a linear-correlation model of climate indicators has been obtained, allowing to determine the rate of increase in the sums of air temperatures, radiation balance, evaporation from the open water surface or from excessively moistened soil during the biologically active period of the year, annual precipitation, natural moisture coefficient and hydrothermal dryness index, which perform important environment-forming and ecological functions. The results of the study showed that in general, in all natural-geographical zones of the Assa-Talas river basin, the sum of air temperatures, radiation balance, evaporation and hydrothermal dryness index have a positive growth rate, and annual precipitation and the coefficient of natural moisture are negative, contributing to the formation of a positive rate an increase in the deficit of water consumption of agricultural land and a shift in the boundaries of natural zones, which is a signal of the safety of agricultural activities.