Krasnoyarskoye Reservoir, Russia55.1N 91.5E
The Krasnoyarskoye Reservoir on the Yenisei River is one of the largest man-made lakes of river origin in Siberia. It is situated in Russia’s Krasnoyarsky District, at 243m above sea level and a distance of 2,502 km from the mouth of the Yenisei.
The construction of the reservoir started in 1967 and its live storage was filled in 1970. The back- water from the dam extends for a distance of 386 km. The Krasnoyarskoye Reservoir is of the channel type and a long-term storage regulation.
The drainage basin of the reservoir covers three natural zones, forest, forest-steppe and steppe, located in the eastern part of the Sayan Altai mountain range. These zones can be identified in the image by the green color of the forests and the tan color of the steppes.
The drainage network of the basin mainly consists of mountain rivers with narrow valleys, of which 35 enter Krasnoyarskoye Reservoir. The recharge water from the rivers is formed by melting snow and precipitation of summer- autumn period.
The water resources of the reservoir are used for electric power generation at the Krasnoyarsk hydro-electric power station (capacity 6x106kWh). Annual power production is 20×109 kW.
The reservoir is also used for navigation, transportation and commercial fishing during the ice free period. Further, its water is used for irrigation in the steppe region of the basin.
Environmental threats to the reservoir include pollution and lake shore erosion. The major sources of pollution are mining industry wastewater and domestic sewage from the cities of Abakan and Tchernogorsk. The projects to deal with both problems are bank reinforcement, removal of floating and sinking timbers, sewage treatment, and filling shallow parts of the lake for agricultural development.