Intra-annual distribution of runoff of the rivers of the Esil basin

Abstract

In this article, the intra-annual distribution of river runoff, determined by multi-year data from the
rivers of the Esil basin, modified by anthropogenic influence, was calculated. Hydrological stations with
long-term long data series were mainly selected. From 1933 to 2005, the river Esil – at the Astana station,
1974 – 2015, the river Esil – at the Turgenevka station, 1936 – 2015, the river Zhabay – at the
Atbasar station and from 1973 to 2015, the Moiyldy river – at the Nikolaevka station was analyzed.The
gaps in the series of annual and monthly water flow rates were restored by the analogy method. The
impact of anthropogenic impact on the annual flow of the Astana River Sewage has been estimated. For
calculation of the annual distribution of runoff the method of layout proposed by V. G. Andreyanov is
applied With the available data by means of constructing an integral curve, periods of river runoff with
different levels of economic activity were identified. Conditionally natural and disturbed periods of runoff
are reconciled with each other.