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The Shchuchinsko-Borovskaya system, consisting of seven large lakes, was studied. Lakes of tectonic origin are located at different absolute levels within the granite massif. The water in the lakes is fresh, less often brackish, and previously has been widely used for agricultural and drinking purposes. Based on monitoring data and analysis of a long-term series of satellite images over the past 30 years, a significant decrease in the level of the lakes and water resources has been revealed. This has affected the ...

The majority of the rivers in Kazakhstan can be characterized as plain and lowland type. The flow in such rivers is uneven both within the year and over the years. In order to regulate this variability, to conserve water resources as well as to provide water for domestic use the reservoirs have been built. In Kazakhstan, there are 43 large on stream and valley reservoirs on 33 rivers, half of which are on plain, lowland rivers. One of such reservoirs, Astana reservoir is studied in this paper. It is situated on th...