干旱区生态环境知识资源中心(Arid): Using isotopes and hydrogeochemistry to characterize groundwater flow systems within intensively pumped aquifers in an arid inland basin, Northwest China

Arid

DOI	10.1016/j.jhydrol.2021.126048
	Using isotopes and hydrogeochemistry to characterize groundwater flow systems within intensively pumped aquifers in an arid inland basin, Northwest China
	Wang, Jianjun; Liang, Xing; Ma, Bin; Liu, Yanfeng; Jin, Menggui; Knappett, Peter S. K.; Liu, Yalei
通讯作者	Liang, X ; Ma, B (corresponding author), China Univ Geosci, Sch Environm Studies, Wuhan 430078, 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	The impacts of long-term pumping on groundwater flow patterns and groundwater chemistry are unclear in the Manas River Basin, an arid inland basin in Northwest China. In this study, hydraulic heads, hydrochemistry and environmental isotopic tracers were analyzed to reveal groundwater flow patterns, recharge sources and deduce hydrogeochemical processes in this highly exploited aquifer system. Spatial trends in the isotopic ratios delta O-18 and delta H-2 indicate that groundwater originates from glacial melting and precipitation in the mountainous area. In the piedmont plains, dissolution of calcite, gypsum and dolomite yields a groundwater type dominated by Ca-HCO3-SO4 with TDS of 300 mg/L. In this area, high H-3 concentrations demarcate local flow systems and imply modern precipitation recharge. Downgradient in the lowlands, irrigation return flow recharges shallow groundwater through local flow paths. Groundwater pumping has intensified vertical hydraulic gradients causing vertical mixing between aquifers. Generally, across the basin, regional flow systems contain groundwater with C-14 ages ranging from modern to 33,000 years, with the oldest waters found in wells with depths greater than 200 m. From high to low elevation groundwater chemistry transitions from Ca-HCO3-SO4 to Na-Cl-SO4 type as concentrations of Cl and overall TDS increase. The replacement of Ca2+ with Na+ as the dominant cation suggests reverse ion exchange and carbonate precipitation occur along the intermediate and regional flow paths. Anthropogenic activities (i.e. pumping, irrigation return flow, application of fertilizers) impact shallow groundwater chemistry (<60 m). This research reveals the impacts of natural and human-induced hydrogeochemical processes impacting groundwater chemistry in this basin with implications for similar semi-arid to arid, inter-montane basins around the world.
英文关键词	Groundwater flow patterns Hydrogeochemistry Environmental isotopes Manas River Basin Northwest China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000641592600081
WOS关键词	MANAS RIVER-BASIN ; WATER-RESOURCES ; RESIDENCE TIME ; CLIMATE-CHANGE ; SURFACE-WATER ; RECHARGE ; EVOLUTION ; AREA ; IRRIGATION ; REGION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368874
作者单位	[Wang, Jianjun; Liang, Xing; Ma, Bin; Liu, Yanfeng; Jin, Menggui] China Univ Geosci, Sch Environm Studies, Wuhan 430078, Peoples R China; [Wang, Jianjun] Three Gorges Geotech Engn Co Ltd, Wuhan 430074, Peoples R China; [Jin, Menggui] China Univ Geosci, Lab Basin Hydrol & Wetland Ecorestorat, Wuhan 430074, Peoples R China; [Jin, Menggui] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China; [Knappett, Peter S. K.] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA; [Liu, Yalei] China Geol Survey, Cent South China Innovat Ctr Geosci, Wuhan Ctr, Wuhan 430205, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jianjun,Liang, Xing,Ma, Bin,et al. Using isotopes and hydrogeochemistry to characterize groundwater flow systems within intensively pumped aquifers in an arid inland basin, Northwest China[J],2021,595.
APA	Wang, Jianjun.,Liang, Xing.,Ma, Bin.,Liu, Yanfeng.,Jin, Menggui.,...&Liu, Yalei.(2021).Using isotopes and hydrogeochemistry to characterize groundwater flow systems within intensively pumped aquifers in an arid inland basin, Northwest China.JOURNAL OF HYDROLOGY,595.
MLA	Wang, Jianjun,et al."Using isotopes and hydrogeochemistry to characterize groundwater flow systems within intensively pumped aquifers in an arid inland basin, Northwest China".JOURNAL OF HYDROLOGY 595(2021).