INTRA-ANNUAL CHANGES IN THE FLOW OF THE ZHAIYK RIVER AND ITS MAIN TRIBUTARIES

Abstract

The results of the analysis of long-term trends in the intra-annual distribution of the flow of the
Zhaiyk River and its main tributaries are presented. The studies were carried out on the basis of standard methods of
statistical analysis using the values of daily, monthly average, maximum and minimum values of runoff. The longterm dynamics of the flow parameters is considered, taking into account the phases of different water content. It is
established that the water regime of the studied rivers is characterized by a tendency to reduce the proportion of
spring flooding and increase the proportion of inter-soil runoff, especially winter. The increase in winter runoff
occurs as a result of climate-driven changes, manifested in a steady trend of increasing average annual air temperature both within the seasons and from year to year. Anthropogenic impact in the form of flow regulation by reservoirs makes similar changes to the flow regime and in the current conditions probably require adjustments to the flow regulation regime.