干旱区生态环境知识资源中心(Arid): Estimation of fossil groundwater mass fraction accounting for endogenic carbon input across California

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DOI	10.1016/j.jhydrol.2021.126034
	Estimation of fossil groundwater mass fraction accounting for endogenic carbon input across California
	Wang, Tao; Chen, Jiansheng; Zhang, Chenming
通讯作者	Chen, JS (corresponding author), Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	595
英文摘要	California is facing water crisis, especially with significant depletion of groundwater resources. Recently, Jasechko proposed a method for estimation of the fossil groundwater mass fraction (F-fossil) based on C-14 (Jasechko's method), but it did not account for the endogenic carbon source. Based on carbon isotope and water chemistry balance, the ratio of the concentration of endogenic carbon to dissolved inorganic carbon (C-endogenic/DIC ratio) in groundwater is quantified, and the Jasechko's method is modified with consideration of endogenic carbon input. Both Jasechko's and modified methods are applied to estimate the F-fossil across California, where endogenic CO2 degases at many locations. The results show that, averagely, the C-endogenic takes up similar to 23.4% of DIC in groundwater samples, with similar to 19.4% of samples owning C-endogenic/DIC ratio exceeding 50%. About 8.4% of groundwater samples show smaller F-fossil calculated by the modified than Jasechko's method, with the mean value of F-fossil deceasing by similar to 3.1%. This indicates obvious mixture of endogenic carbon in DIC of groundwater across California, but it has little influence on the estimation of F-fossil. Even though, the process-based modified method is more objective than the empirically Jasechko's method. Groundwater samples with high C-endogenic/DIC ratio and mass fraction difference of fossil groundwater between the two methods are mainly located in the Mojave Desert with wide distribution of main active faults. The average F-fossil calculated by both methods are similar to 70%, demonstrating the dominance of fossil groundwater across California. These results are beneficial to better understand the C-14 dating method and the groundwater resources in California.
英文关键词	Groundwater resources C-14 dating Endogenic carbon Hydrological cycle Geochemistry California
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641592600068
WOS关键词	SAN-ANDREAS FAULT ; VOLATILE FLUXES ; ISOTOPES ; CO2 ; SPRINGS ; COLORADO ; TRACERS ; HELIUM ; ORIGIN ; SYSTEM
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	河海大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350889
作者单位	[Wang, Tao] Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Peoples R China; [Wang, Tao; Zhang, Chenming] Univ Queensland, Sch Civil Engn, St Lucia, Qld 4072, Australia; [Chen, Jiansheng] Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tao,Chen, Jiansheng,Zhang, Chenming. Estimation of fossil groundwater mass fraction accounting for endogenic carbon input across California[J]. 河海大学,2021,595.
APA	Wang, Tao,Chen, Jiansheng,&Zhang, Chenming.(2021).Estimation of fossil groundwater mass fraction accounting for endogenic carbon input across California.JOURNAL OF HYDROLOGY,595.
MLA	Wang, Tao,et al."Estimation of fossil groundwater mass fraction accounting for endogenic carbon input across California".JOURNAL OF HYDROLOGY 595(2021).