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 HCO...

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Autores principales:	V. I. Poletaeva, E. N. Tirskikh, M. V. Pastukhov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1e3ae0980b1746b28aa952785314e83d
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spelling	oai:doaj.org-article:1e3ae0980b1746b28aa952785314e83d2021-12-02T16:53:19ZHydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)10.1038/s41598-021-90603-x2045-2322https://doaj.org/article/1e3ae0980b1746b28aa952785314e83d2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90603-xhttps://doaj.org/toc/2045-2322Abstract 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+, 13 times for Mg2+, 16 times for HCO3 −, 20 times for Ca2+, 23 times for Na+, 80 times for SO4 2−, 105 times for Cl−. Such variability at different sites of the reservoir was due to the interrelation between major ion concentrations in the pore water and environmental parameters. The major factor responsible for pore water chemistry was the dissolution of sediment-forming material coming from various geochemical provinces. In the south part of the reservoir, Cl−, Na+ and SO4 2− concentrations may significantly increase in pore water due to the effect of subaqueous flow of highly mineralized groundwater.V. I. PoletaevaE. N. TirskikhM. V. PastukhovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q V. I. Poletaeva E. N. Tirskikh M. V. Pastukhov Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
description	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+, 13 times for Mg2+, 16 times for HCO3 −, 20 times for Ca2+, 23 times for Na+, 80 times for SO4 2−, 105 times for Cl−. Such variability at different sites of the reservoir was due to the interrelation between major ion concentrations in the pore water and environmental parameters. The major factor responsible for pore water chemistry was the dissolution of sediment-forming material coming from various geochemical provinces. In the south part of the reservoir, Cl−, Na+ and SO4 2− concentrations may significantly increase in pore water due to the effect of subaqueous flow of highly mineralized groundwater.
format	article
author	V. I. Poletaeva E. N. Tirskikh M. V. Pastukhov
author_facet	V. I. Poletaeva E. N. Tirskikh M. V. Pastukhov
author_sort	V. I. Poletaeva
title	Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
title_short	Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
title_full	Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
title_fullStr	Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
title_full_unstemmed	Hydrochemistry of sediment pore water in the Bratsk reservoir (Baikal region, Russia)
title_sort	hydrochemistry of sediment pore water in the bratsk reservoir (baikal region, russia)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1e3ae0980b1746b28aa952785314e83d
work_keys_str_mv	AT vipoletaeva hydrochemistryofsedimentporewaterinthebratskreservoirbaikalregionrussia AT entirskikh hydrochemistryofsedimentporewaterinthebratskreservoirbaikalregionrussia AT mvpastukhov hydrochemistryofsedimentporewaterinthebratskreservoirbaikalregionrussia
_version_	1718382844512829440

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

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