干旱区生态环境知识资源中心(Arid): Water Quality Assessment Bias Associated with Long-Screened Wells Screened across Aquifers with High Nitrate and Arsenic Concentrations

Arid

DOI	10.3390/ijerph19169907
	Water Quality Assessment Bias Associated with Long-Screened Wells Screened across Aquifers with High Nitrate and Arsenic Concentrations
	Huang, Yibin; Li, Yanmei; Knappett, Peter S. K.; Montiel, Daniel; Wang, Jianjun; Aviles, Manuel; Hernandez, Horacio; Mendoza-Sanchez, Itza; Loza-Aguirre, Isidro
通讯作者	Huang, YB
来源期刊	INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
EISSN	1660-4601
出版年	2022
卷号	19 期号:16
英文摘要	Semi-arid regions with little surface water commonly experience rapid water table decline rates. To hedge against the falling water table, production wells in central Mexico are commonly installed to depths of several hundred meters below the present water table and constructed as open boreholes or perforated casings across their entire length. Such wells represent highly conductive pathways leading to non-negligible flow across chemically distinct layers of an aquifer-a phenomenon known as ambient flow. The objectives of this study were to estimate the rate of ambient flow in seven production wells utilizing an end-member mixing model that is constrained by the observed transient chemical composition of produced water. The end-member chemical composition of the upper and lower layers of an urban aquifer that overlies geothermal heat is estimated to anticipate the future quality of this sole source of water for a rapidly growing urban area. The comprehensive water chemistry produced by seven continuously perforated municipal production wells, spanning three geologically unique zones across the city of San Miguel de Allende in Guanajuato State, was monitored during one day of pumping. The concentration of conservative constituents gradually converged on steady-state values. The model indicates that, relative to the lower aquifer, the upper aquifer generally has higher specific conductance (SC), chloride (Cl), nitrate (NO3), calcium (Ca), barium (Ba) and magnesium (Mg). The lower aquifer generally has a higher temperature, sodium (Na), boron (B), arsenic (As) and radon (Rn). Ambient flow ranged from 33.1 L/min to 225.7 L/min across the seven wells, but this rate for a given well varied depending on which tracer was used. This new 3D understanding of the chemical stratification of the aquifer suggests that as water tables continue to fall, concentrations of geothermally associated contaminants of concern will increase in the near future, potentially jeopardizing the safety of municipal drinking water.
英文关键词	long-screened wells nitrate arsenic geogenic contaminants geothermal Mexico semi-arid arid urban contaminants agriculture contaminants
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000845670200001
WOS关键词	MODELING STREAMWATER CHEMISTRY ; SOILWATER END-MEMBERS ; HYDRAULIC CONDUCTIVITY ; GROUNDWATER QUALITY ; LAND SUBSIDENCE ; SUPPLY WELLS ; FLOW ; EXPOSURE ; HYDROCHEMISTRY ; PLAIN
WOS类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393159
推荐引用方式 GB/T 7714	Huang, Yibin,Li, Yanmei,Knappett, Peter S. K.,et al. Water Quality Assessment Bias Associated with Long-Screened Wells Screened across Aquifers with High Nitrate and Arsenic Concentrations[J],2022,19(16).
APA	Huang, Yibin.,Li, Yanmei.,Knappett, Peter S. K..,Montiel, Daniel.,Wang, Jianjun.,...&Loza-Aguirre, Isidro.(2022).Water Quality Assessment Bias Associated with Long-Screened Wells Screened across Aquifers with High Nitrate and Arsenic Concentrations.INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,19(16).
MLA	Huang, Yibin,et al."Water Quality Assessment Bias Associated with Long-Screened Wells Screened across Aquifers with High Nitrate and Arsenic Concentrations".INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 19.16(2022).