干旱区生态环境知识资源中心(Arid): Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers

Arid

DOI	10.5194/hess-23-427-2019
	Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers
	Ma, Bin 1,2; Jin, Menggui 1,2,3; Liang, Xing 1,4; Li, Jing 1
通讯作者	Jin, Menggui
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2019
卷号	23 期号:1 页码:427-446
英文摘要	Investigating groundwater residence time and recharge sources is crucial for water resource management in the alluvium aquifers of arid basins. Environmental tracers (chlorofluorocarbons, H-3, C-14, delta H-2, delta O-18) and groundwater hydrochemical components are used for assessing groundwater mean residence times (MRTs) and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers in the Manas River basin (China). Aquifers under the Manas River upstream (south of the fault) contains very high H-3 activity (41.1-60 TU), implying water recharge affected by the nuclear bomb tests of the 1960s. Carbon-14 groundwater age correlates positively with distance from mountain area (3000-5000 years in the midstream to > 7000 years in the downstream) and groundwater depth, but correlates negatively to a decrease in H-3 activity (1.1 TU) and more negative delta O-18 values. This phenomenon reveals that the source of the deeper groundwater in the semi-confined aquifer is paleo-meteoric recharge. Special attention has been paid to the estimation of MRTs using CFCs and H-3 by an exponential piston flow model. The results show that MRTs vary from 19 to 101 years by CFCs and from 19 to 158 years by H-3. MRTs estimated from H-3 are much longer than those from CFCs, probably due to the different time lag of liquid (H-3) and gas-phase CFCs through the unsaturated zone. The MRTs estimated by CFCs show good correlations with pH and the concentrations of SiO2 and SO42-, which can provide a possible approach to estimate first-order proxies of MRTs for groundwater age. The young water fractions are investigated by the CFC binary mixing method in the south and north of the fault. Relatively modern recharge is found in the south of the fault with young (post-1940) water fractions of 87%-100 %, whereas in the north of the fault the young water fractions vary from 12% to 91 %. This study shows that the combination of CFCs and H-3 residence time tracers can help in analysing the groundwater MRTs and the recharge sources for the different mixing end-members.
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000456714400002
WOS关键词	YOUNG WATER FRACTIONS ; TRANSIT TIMES ; STABLE-ISOTOPES ; PREFERENTIAL FLOW ; AGE DISTRIBUTIONS ; TRITIUM ; BASIN ; CFCS ; CATCHMENT ; SYSTEMS
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216203
作者单位	1.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China; 2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China; 3.China Univ Geosci, Lab Basin Hydrol & Wetland Ecorestorat, Wuhan 430074, Hubei, Peoples R China; 4.China Univ Geosci, Hubei Key Lab Wetland Evolut & Ecol Restorat, Wuhan 430074, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Ma, Bin,Jin, Menggui,Liang, Xing,et al. Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers[J],2019,23(1):427-446.
APA	Ma, Bin,Jin, Menggui,Liang, Xing,&Li, Jing.(2019).Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers.HYDROLOGY AND EARTH SYSTEM SCIENCES,23(1),427-446.
MLA	Ma, Bin,et al."Application of environmental tracers for investigation of groundwater mean residence time and aquifer recharge in fault-influenced hydraulic drop alluvium aquifers".HYDROLOGY AND EARTH SYSTEM SCIENCES 23.1(2019):427-446.