Abstract

New data on the chlorophyll a (Chl a) content in the water of the Volga River reservoirs are presented. In years with different temperature regimes (2017 and 2018), the content of Chl a varied from minimal 2.2–13.8 to maximal 7.6–50.5 and 25.8–104 µg/L, respectively. As before, the Chl a concentration in the Volga cascade decreases from the upstream reservoirs to downstream ones; the maximum is recorded in highly eutrophic Shosha reach of the Ivankovo Reservoir and in the estuarine section of the Oka River in the Cheboksary Reservoir; and the local increase in Chl a is also recorded in tributaries and their mouth areas, protected shallow areas, and near-dam zones. The mean Chl a concentrations characterize the Ivankovo, Uglich, and Cheboksary reservoirs as eutrophic and the Saratov and Volgograd reservoirs as mesotrophic; the trophic status of the Rybinsk, Gorky, and Kuibyshev reservoirs varies from mesotrophic to moderately eutrophic and eutrophic.

中文翻译：

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伏尔加河水库的叶绿素含量和现代营养状态（2017–2018）

摘要

提出了有关伏尔加河水库水中叶绿素a（Chl a）含量的新数据。在年与不同的温度体系（2017和2018），叶绿素的含量一从最小2.2-13.8变化分别以最大7.6-50.5和25.8-104微克/升。如前所述，伏尔加河级联中的Chl a浓度从上游储层降低到下游储层。最高记录在伊万科沃水库的富营养化Shosha河段和切博克萨雷水库的奥卡河河口段；和叶绿素的局部增加一个也记录在支流，口中区，保护浅水区和近坝区域。平均叶绿素一浓度将伊万科沃，乌格利奇和切博克萨雷的储层描述为富营养化，而萨拉托夫和伏尔加格勒的储层则描述为中营养。雷宾斯克，高尔基和库比雪夫水库的营养状态从中营养到中度富营养化和富营养化不等。