Features of Interannual Dynamics of the Hydrochemical Parameters of Baikal Tributaries near the Village of Listvyanka

Significant changes have been observed in the ecosystem of Lake Baikal in recent decades: there is a mass death of sponges and the development of algae atypical for the lake. In this regard, the study of small tributaries of Lake Baikal flowing in the areas of coastal settlements is of particular relevance. This article presents the results of a hydrochemical study of lake tributaries: the Krestovka River, the Kamenushka Stream, and the Malaya (M.) and Bol’shaya (B.) Cheremshanka streams flowing in the village of Listvyanka (one of the largest tourist areas of the lake). Interannual changes in the content of organic matter and biogenic elements and in mineralization are considered. The hydrochemical composition of tributaries in the modern period is compared with the results of a study from the 1950s. Changes in the relative composition of waters of the tributaries in 2015–2021 are shown. Factors of the formation of the chemical composition of the studied rivers are suggested. The impact of the anthropogenic factor on the formation of waters of the Kamenushka, M. Cheremshanka, and B. Cheremshanka streams is pointed out.