干旱区生态环境知识资源中心(Arid): Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin

Arid

DOI	10.1016/j.jhydrol.2021.126774
	Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin
	Xu, Jia; Ling, Hongbo; Zhang, Guangpeng; Yan, Junjie; Deng, Mingjiang; Wang, Guangyan; Xu, Shengwu
通讯作者	Ling, HB (corresponding author), Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	602
英文摘要	Due to its potentially important role in the global carbon cycle, the dissolved carbon of groundwater systems is severely affected by climate change and oasisization in desert inland river basins. However, the spatial distribution and driving mechanisms of groundwater dissolved carbon are still poorly understood. Here, we use groundwater data from 72 monitoring wells to reveal the spatial variations in the dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) concentrations of the shallow groundwater in the Tarim River basin, an arid region in northwest China. Due to the unsaturated characteristics of the groundwater recharge, the DOC concentration of groundwater increased significantly with greater lateral distance from the downstream river, rather than the DIC concentration of groundwater. There was a significant positive linear correlation between DOC and DIC. Redundancy analysis showed that groundwater depth (GD) and evapotranspiration influenced the DOC concentration, while the DIC concentration was greatly affected by the total salinity of groundwater and farmland. Likewise, both DOC and DIC concentrations were most affected by Ca2+. Further analysis showed that a decrease in the GD will lead to a decrease in the DOC concentration (dilution effect), but it has no obvious influence on the DIC concentration. High evapotranspiration in the desert region drives an increase in the DOC concentration (concentration effect) and a decrease in the DIC concentration. Our study highlights that average annual evapotranspiration and GD jointly drive the differences in the DOC and DIC concentration changes in the shallow groundwater of the Tarim River basin.
英文关键词	Climate change Dissolved inorganic carbon Dissolved organic carbon Groundwater depth Groundwater major ions Hydrological processes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000704794400065
WOS关键词	ORGANIC-CARBON ; INORGANIC CARBON ; RIPARIAN GROUNDWATER ; ALPINE CATCHMENT ; MATTER ; WATER ; DYNAMICS ; PATTERNS ; QUALITY ; STREAMS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363925
作者单位	[Xu, Jia; Deng, Mingjiang] Xian Univ Technol, Inst Water Resources & Hydroelect Engn, State Key Lab Ecohydraul Northwest Arid Reg China, Xian 710048, Peoples R China; [Ling, Hongbo; Zhang, Guangpeng] Chinese Acad Sci, State Key Lab Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China; [Ling, Hongbo; Zhang, Guangpeng] Xinjiang Aksu Oasis Agroecosyst Observat & Expt S, Urumqi 830011, Peoples R China; [Yan, Junjie] Yili Normal Univ, Yining 835000, Peoples R China; [Wang, Guangyan; Xu, Shengwu] Management Bur Main Stream Xinjiang Tarim River B, Korla 841000, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jia,Ling, Hongbo,Zhang, Guangpeng,et al. Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin[J]. 中国科学院新疆生态与地理研究所,2021,602.
APA	Xu, Jia.,Ling, Hongbo.,Zhang, Guangpeng.,Yan, Junjie.,Deng, Mingjiang.,...&Xu, Shengwu.(2021).Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin.JOURNAL OF HYDROLOGY,602.
MLA	Xu, Jia,et al."Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin".JOURNAL OF HYDROLOGY 602(2021).