Chemical composition and water quality of the Baikal ecosystem in 2018

4th School-Seminar of Young Russian Scientists "Problems of Sustainable Regional Development", dedicated to the 70th anniversary of Academician of the Russian Academy of Sciences Arnold Kirillovich Tulokhonov

自然科学（总论）

Grebenshchikova, V.I.^1 ; Kuzmin, M.I.^1 ; Yu Suslova, M.^2 ; Shtykova, Yu R^2 ; Doroshkov, A.A.^1

Vinogradov Institute of Geochemistry SB RAS, Irkutsk

664033, Russia^1

Limnological Institute SB RAS, Irkutsk

664033, Russia^2

关键词: Average numbers;    Calcium bicarbonate;    Chemical compositions;    Ion composition;    Lake Baikal;    Pelagic zones;    Rivers and streams;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/320/1/012030/pdf
DOI  :  10.1088/1755-1315/320/1/012030

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

Analysis of the ion composition in the water of the Baikal ecosystem (Lake Baikal, the Angara River estuary and 35 tributaries) in the spring and autumn of 2018 has shown that the water from Baikal and the Angara estuary maintains low mineralization (94-98 mg/l) and corresponds to the calcium bicarbonate composition. The average chemical composition of the water from the Angara estuary is within the range of minimum-maximum values of the Baikal water. In the water from some tributaries, mineralization is two-three times higher compared to Baikal and the estuary. The average ion composition of the Baikal water intermediates in the range of minimum-maximum values of the studied tributaries. Microbiological studies have shown that the average number of hygiene indicator microorganisms in the water from the tributaries is much higher than in Baikal and the Angara estuary. Unlike the tributaries, the water from Baikal and the Angara estuary contain less number of organotrophic microorganisms. The most extensive Baikal tributaries, which drain the significant and status diverse (anthropogenic and natural) areas around Lake Baikal, definitely have a negative impact on the lake. However, many smaller rivers and streams flowing into Baikal, as well as horizontal and cyclonic currents existing in Baikal, preserve its status as the site with pure drinking water, but only in the pelagic zone of the lake.