Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia).

ABSTRACT: This study aimed to identify the factors responsible for the major ion composition of pore water from the bottom sediments of the Bratsk water reservoir, which is part of the largest freshwater Baikal-Angara water system. In the Bratsk reservoir, the overlying water was characterized as HCO₃-Ca-Mg type with the mineralization ranging between 101.2 and 127.7 mg L^-1 and pore water was characterized as HCO₃-SO₄-Ca, SO₄-Cl-Ca-Mg and mixed water types, which had mineralization varying from 165.9 to 4608.1 mg L^-1. The ionic composition of pore waters varied both along the sediment depth profile and across the water area. In pore water, the difference between the highest and lowest values was remarkably large: 5.1 times for K⁺

SUBMITTER: Poletaeva VI 

PROVIDER: S-EPMC8160327 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature