Current hydroecological state of the Ural River in the lower reachesстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 26 января 2022 г.
Аннотация:Climate and hydrological changes in the Ural River basin, together with watermanagement activities determine the current hydroecological state of the river in its lowercourse. In comparison with the conventional natural background, the salinity of water in highwater period increased by 2.5 times, in low water period - by 5 - 8 %. Contamination of thelower course of the river is caused by the inflow of pollutants from the upstream sections andthe confluence of the polluted tributaries. In the area with no tributaries, the water ischaracterized as "standard-clean". The saprobity indices, which characterize the content oforganic substances in water, are located within the boundaries of the b-mesosaprobic zone,which characterize low level of water contamination. The content of dissolved oxygenindicates insufficient aeration of the river water during most of the year. The lowest oxygencontent is observed during winter period.