干旱区生态环境知识资源中心(Arid): Study of groundwater recharge using combined unsaturated-and saturated-zone chloride mass balance methods

Arid

DOI	10.1002/hyp.14927
	Study of groundwater recharge using combined unsaturated-and saturated-zone chloride mass balance methods
	Jiang, Sanyuan; Rao, Wenbo; Han, Liangfeng; Meredith, Karina T.
通讯作者	Jiang, SY
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2023
卷号	37 期号:6
英文摘要	Understanding groundwater recharge mechanisms is essential for reliable groundwater recharge estimation for sustainable groundwater resource assessment and management, especially in arid and semiarid areas. In this study, chloride, together with stable isotopes (O-18 and H-2), in 1-year rainfall, soil water from representative profiles, and groundwater samples, collected in the Ordos Plateau, northern China were analysed. Groundwater recharge was estimated using unsaturated- and saturated-zone chloride mass balance (CMB). An equation that describes the relationship between chloride concentrations in saturated zone water (C-sz) and soil water residence time (tau) was derived. With the help of the relationship, chloride concentrations in unsaturated zone water (C-uz) and in groundwater (C-sz) can be used to uncover water flow and chloride transport in the unsaturated zone. The relationship between C-sz and C-uz indicates that, the groundwater was recharged mainly by intense rainfall events. Small rainfall events did not lead to groundwater recharge but contributed to the flux of chloride to soil surface. Stable isotopic compositions of O-18 and H-2 provided corroborative evidence of the recharge processes. The relationship between C-sz and tau indicates further that there is no source of chloride in the groundwater other than that from precipitation. Thus, C-sz can give more reliable recharge estimates. C-uz was influenced by heavy rainfall-induced runoff, run-on and bypass flow events and cannot give reliable recharge estimates. However, if used jointly with C-sz, C-uz can help to gain insights into recharge processes and yield groundwater recharge estimates with higher certainty. The outcomes of this study can assist for groundwater recharge investigation and assessment in regions where the assumptions and boundary conditions necessary for the correct application of the CMB method may not be met.
英文关键词	chloride mass balance groundwater recharge saturated zone semiarid and arid areas unsaturated zone
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001010335200001
WOS关键词	SPATIAL VARIABILITY ; ENVIRONMENTAL TRACERS ; LOESS PLATEAU ; ORDOS PLATEAU ; SOIL-WATER ; BASIN ; MECHANISMS ; AQUIFER ; CHINA ; FLOW
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396873
推荐引用方式 GB/T 7714	Jiang, Sanyuan,Rao, Wenbo,Han, Liangfeng,et al. Study of groundwater recharge using combined unsaturated-and saturated-zone chloride mass balance methods[J],2023,37(6).
APA	Jiang, Sanyuan,Rao, Wenbo,Han, Liangfeng,&Meredith, Karina T..(2023).Study of groundwater recharge using combined unsaturated-and saturated-zone chloride mass balance methods.HYDROLOGICAL PROCESSES,37(6).
MLA	Jiang, Sanyuan,et al."Study of groundwater recharge using combined unsaturated-and saturated-zone chloride mass balance methods".HYDROLOGICAL PROCESSES 37.6(2023).