Transformation of the flow of matter in valley reservoirs as a factor of improving their ecological conditionстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 26 января 2022 г.
Аннотация:The results of perennial studies of the valley reservoirs of the Moskva River(Mozhaysk, Ruza and Ozerna reservoirs) have shown that the influx of river waters bringingnutrients leads to eutrophication of the upper parts of the reservoirs. However, as water moves,this matter is extracted by phytoplankton and zooplankton and undergoes sedimentation. Thecontent of the suspended materials, iron, true colour of water near the dam are two times lowerthan in the upper reaches of the reservoirs; the concentration of mineral silicon and phosphorusdecreases by nearly one-fourth, and that of organic matter, by 10-15%. As a result, in the neardamzones of the water reservoirs biological productivity decreases: the biomass ofphytoplankton and bacteria in water decreases by nearly 40%. Thus, transformation of the flowof matter along the length of the valley reservoirs results in essential improvement of thequality of water and reduction of the degree of eutrophication, which is especially importantfor the reservoirs which serve as sources of water supply for the city of Moscow.