干旱区生态环境知识资源中心(Arid): Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia

Arid

DOI	10.3390/w16050763
	Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia
	Yao, Yuan; Tu, Chenwei; Hu, Gaojia; Zhang, Yuhan; Cao, Hanyuan; Wang, Wanrui; Wang, Weihua
通讯作者	Wang, WR
来源期刊	WATER
EISSN	2073-4441
出版年	2024
卷号	16 期号:5
英文摘要	Intense anthropogenic activities in arid regions remarkably affect groundwater by causing phreatic decline and water environmental deterioration. A systematic understanding of groundwater hydrochemical evolution and recharge is critical to regional water, ecological and agricultural security in arid regions, but is not well known in arid oasis-deserts. This research identified groundwater recharge processes and assessed the impact of anthropogenic activities on groundwater hydrochemical evolution in a representative oasis-desert in Central Asia using stable isotopic indicators (delta 2H and delta 18O) and hydrochemical data. Results indicated that the normalized difference vegetation index (NDVI) and cultivated land area exhibited a significant increasing trend during 2000 to 2020. Stable water isotopes and the ionic composition of both groundwater and surface water exhibited obviously spatial heterogeneity and seasonal variation. Generally, the spatial distribution pattern of major dissolved ions for shallow groundwater was consistent and increased along the groundwater flow direction from midstream to downstream. Surface water and groundwater were both characterized by higher delta 18O and total dissolved solids (TDS) in the non-flood season than those in the flood season. Shallow groundwater had a larger seasonal variation in delta 18O and TDS than other water components. Groundwater level in monitored wells generally presented a decreasing trend from 2018 to 2021, accompanied by a decrease in phreatic water TDS and NDVI in the desert area. Gypsum dissolution and weathering of silicate and halite had an important role in forming groundwater hydrochemistry. Anthropogenic activities significantly affected groundwater hydrochemistry and recharge. Shallow groundwater received its primary recharge from surface water and lateral groundwater flow, constituting 73% and 27% of the total recharge, respectively. Agricultural activities and groundwater overexploitation were the main factors for variations in groundwater level and quality in the oasis area, and directly affected groundwater and natural vegetation in the desert area. The results would be helpful to deeply understand groundwater hydrochemical evolution and cycling, and beneficial for groundwater efficient utilization and desert ecosystem restoration in the arid areas.
英文关键词	groundwater dynamic stable isotopes hydrochemistry recharge agricultural activities oasis-desert region
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001183034400001
WOS关键词	CLIMATE-CHANGE ; EVOLUTION ; AQUIFERS ; CHINA ; BASIN ; TIME
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405857
推荐引用方式 GB/T 7714	Yao, Yuan,Tu, Chenwei,Hu, Gaojia,et al. Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia[J],2024,16(5).
APA	Yao, Yuan.,Tu, Chenwei.,Hu, Gaojia.,Zhang, Yuhan.,Cao, Hanyuan.,...&Wang, Weihua.(2024).Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia.WATER,16(5).
MLA	Yao, Yuan,et al."Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia".WATER 16.5(2024).