Published on 25 April 2020
The purpose of this work to study, to analyze and identify the patterns of long-term fluctuations of maximum water flow at the rivers of Armenia mountain areas and Ukraine in the context of global climate change, perform a comparative analysis. To achieve this goal, the results of actual observations of Armhydromet and Ukrainian HMC, available literature sources were collected, processed and analyzed.
As a result of the analysis of the dates of observation and the values of the maximum runoff, it can be noted that in the territories under consideration the genesis of the annual maximum discharge is different. For the mountain rivers of Armenia, the highest values of raising the level and discharge of water are typical during the spring flood, while for the rivers of the Ukrainian Carpathians its are observed during the passage of summer and winter floods. The impact of climate change on the dynamics of the maximum annual rivers flow is also not clear; on the territory of Armenia, the tendency of decreasing values of the maximum flow prevails, in Ukraine while negative and positive trends are observed practically equally. The obtained results open up prospects for further joint research, in particular, on the development of regional methods for calculating the maximum runoff of ungauged rivers.
Findings.• Studying the laws of the formation of maximum river flow in the context of regional and global climate changes is an urgent task of modern geographic science; • Analysis of data on annual runoff maxima showed that the territory of Armenia is most characterized by the dates of passage of the maxima in the spring-summer period, while in the Ukrainian Carpathians, floods can occur throughout the calendar year; • Temporary trends during multi-year maximum water flow rates are not straightforward. Negative trends prevail in the territory of Armenia, negative and positive trends are equally characteristic for the rivers of the Ukrainian Carpathians; • The presence of stable links between annual maximums and river catchment areas shows the possibility of developing a methodology for determining the maximum costs of unexplored rivers in Armenia and the Ukrainian Carpathians.
Tags: горная территория, максимальный сток, многолетние колебания, Республика Армения и Украина.
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)