Hydrological and hydrochemical regime of reservoirs of the state national natural park "Kokshetau"

Abstract

In this article, the hydrological and hydro chemical regime of the reservoirs of the SNNP "Kokshetau" for 2017-2020 is studied. Among the studied lakes, the largest in terms of area is Lake Imantau – 5370 ha, and the maximum depth of Lake Shalkar - 11.6 m. In the course of scientific research, it was found that the hydrological regime of the studied reservoirs has not undergone significant changes in recent years. The areas of reservoirs have practically not changed compared to 2019. When studying the hydro chemical regime, it was found that according to the degree of mineralization, the lakes Shalkar and Zerendinskoe are brackish with a mineralization of more than 1 g/dm3, the lakes Lobanovo and Imantau are fresh with a mineralization of up to 1 g/dm3. The ionic composition of water has undergone only minor changes in recent years, mainly due to changes in the hydrological regime. The content of oxygen dissolved in the water was in sufficient quantity and was favorable for the fish species living in them. It should be noted that the high mineralization in the lakes Shalkar and Akkol prevents the natural reproduction of certain fish species (carp and perch). In general, the hydrological and hydro chemical regime of the reservoirs of the SNNP ’’Kokshetau’’ is characterized as favorable for the vital activity of hydrobionts.