New estimate of chemical weathering rate in Xijiang River Basin based on multi-model

Abstract Hydrochemistry and Sr isotope compositions were measured in water samples collected during high- and low-water periods from the main stream and tributaries of the Xijiang River Basin in southern China. The primary weathering end-members were analyzed and calculated using the multi-model com...

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Autores principales:	Yong Zhang, Shi Yu, Shiyi He, Pingan Sun, Fu Wu, Zhenyu Liu, Haiyan Zhu, Xiao Li, Peng Zeng
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1d60216c5cae45ff9677c824b04649b7
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spelling	oai:doaj.org-article:1d60216c5cae45ff9677c824b04649b72021-12-02T13:33:51ZNew estimate of chemical weathering rate in Xijiang River Basin based on multi-model10.1038/s41598-021-84602-12045-2322https://doaj.org/article/1d60216c5cae45ff9677c824b04649b72021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84602-1https://doaj.org/toc/2045-2322Abstract Hydrochemistry and Sr isotope compositions were measured in water samples collected during high- and low-water periods from the main stream and tributaries of the Xijiang River Basin in southern China. The primary weathering end-members were analyzed and calculated using the multi-model combination and classic hydrogeochemical method. During the high-water period, structural factors were found to be the main factors controlling chemical weathering in the basin, whereas anthropogenic activity and other random factors had a negligible influence. During the low-water period, both structural and random factors controlled chemical weathering. Through path-model and semi-variance analyses, we determined and quantified the relationship between the main weathering sources, whose results were stable; this is consistent with the inversion model. The total dissolved substances were mainly derived from carbonate weathering, which was approximately 76% (0–96%) while silicate weathering accounted for only 14% (5–19%). The inversion model results showed that the optimum silicate weathering rate was 7.264–35.551 × 103 mol/km2/year, where carbonic acid was the main factor that induces weathering. The CO2 flux consumed by rock weathering in the basin during the study period was 150.69 × 109 mol/year, while the CO2 flux consumed by carbonic acid weathering of carbonate (CCW) and silicate rocks (CSW) was 144.47 and 29.45 × 109 mol/year, respectively. The CO2 flux produced by H2SO4 weathered carbonate (SCW) was 23.23 × 109 mol/year.Yong ZhangShi YuShiyi HePingan SunFu WuZhenyu LiuHaiyan ZhuXiao LiPeng ZengNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-26 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yong Zhang Shi Yu Shiyi He Pingan Sun Fu Wu Zhenyu Liu Haiyan Zhu Xiao Li Peng Zeng New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
description	Abstract Hydrochemistry and Sr isotope compositions were measured in water samples collected during high- and low-water periods from the main stream and tributaries of the Xijiang River Basin in southern China. The primary weathering end-members were analyzed and calculated using the multi-model combination and classic hydrogeochemical method. During the high-water period, structural factors were found to be the main factors controlling chemical weathering in the basin, whereas anthropogenic activity and other random factors had a negligible influence. During the low-water period, both structural and random factors controlled chemical weathering. Through path-model and semi-variance analyses, we determined and quantified the relationship between the main weathering sources, whose results were stable; this is consistent with the inversion model. The total dissolved substances were mainly derived from carbonate weathering, which was approximately 76% (0–96%) while silicate weathering accounted for only 14% (5–19%). The inversion model results showed that the optimum silicate weathering rate was 7.264–35.551 × 103 mol/km2/year, where carbonic acid was the main factor that induces weathering. The CO2 flux consumed by rock weathering in the basin during the study period was 150.69 × 109 mol/year, while the CO2 flux consumed by carbonic acid weathering of carbonate (CCW) and silicate rocks (CSW) was 144.47 and 29.45 × 109 mol/year, respectively. The CO2 flux produced by H2SO4 weathered carbonate (SCW) was 23.23 × 109 mol/year.
format	article
author	Yong Zhang Shi Yu Shiyi He Pingan Sun Fu Wu Zhenyu Liu Haiyan Zhu Xiao Li Peng Zeng
author_facet	Yong Zhang Shi Yu Shiyi He Pingan Sun Fu Wu Zhenyu Liu Haiyan Zhu Xiao Li Peng Zeng
author_sort	Yong Zhang
title	New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
title_short	New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
title_full	New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
title_fullStr	New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
title_full_unstemmed	New estimate of chemical weathering rate in Xijiang River Basin based on multi-model
title_sort	new estimate of chemical weathering rate in xijiang river basin based on multi-model
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1d60216c5cae45ff9677c824b04649b7
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New estimate of chemical weathering rate in Xijiang River Basin based on multi-model

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