干旱区生态环境知识资源中心(Arid): An appraisal of Chott El Jerid brine encroachment in the Tozeur-south shallow aquifer: Geoelectrical and hydrochemical approach

Arid

DOI	10.1016/j.jappgeo.2021.104341
	An appraisal of Chott El Jerid brine encroachment in the Tozeur-south shallow aquifer: Geoelectrical and hydrochemical approach
	Khalfi, Chaouki; Tarki, Meriem; Dassi, Lassaad
通讯作者	Khalfi, C (corresponding author), Univ Sfax, Natl Engn Sch Sfax, Lab Water Energy & Environm LR3E, Sfax, Tunisia.
来源期刊	JOURNAL OF APPLIED GEOPHYSICS
ISSN	0926-9851
EISSN	1879-1859
出版年	2021
卷号	190
英文摘要	Geoelectrical data were used in conjunction with hydrogeological information and hydrochemical measurements to investigate and conceptualize the Chott El Jerid saltwater encroachment into the Tozeur-south shallow aquifer, southern Tunisia. The hydrogeological investigation shows that the over-pumping of the unconfined aquifer groundwater has resulted in a localized water level decline, which enhanced the encroachment of the brines of the Chott El Jerid discharge area into the shallow water table. This transitional hydrodynamic state is further complicated by the upward vertical flow of relatively fresh-water from the underlying confined aquifer. The geoelectrical study has confirmed the brines encroachment through the predominance of relatively low resistivity values of the shallow aquifer groundwater close to the discharge area, which become progressively high as we move away towards the recharge zones. In fact, the toes shaped resistivity zones in the isoresistivity map bring insight to the mixing of shallow groundwater with Chott brines. However, the presence of a positive resistivity leakage plume confirmed the mixing with upward fresh-water leakages. Hydrochemically, the Chott brines encroachment is manifested by an evolution of hydrochemical facies from Na-Cl end-member towards a Ca-HCO3/SO4 end-member. The variation in groundwater hydrofacies between these two end-members, indicates a progressive evolution as we move along way from the Chott, by mix/Na-mix/SO4 and mix/Na-SO4. These findings are well illustrated in the conceptual model, which shows the impact of the stressed hydrodynamic regime on the behaviors of the electrical and the hydrochemical facies of the PQ aquifer and its groundwater, respectively. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Geoelectrical survey Hydrochemical data Brines encroachment Conceptual model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000655249500006
WOS关键词	SEAWATER INTRUSION ; GROUNDWATER ; TUNISIA ; GEOCHEMISTRY ; SALINIZATION ; EVOLUTION ; REGION ; BASIN ; OASES
WOS类目	Geosciences, Multidisciplinary ; Mining & Mineral Processing
WOS研究方向	Geology ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350662
作者单位	[Khalfi, Chaouki] Univ Sfax, Natl Engn Sch Sfax, Lab Water Energy & Environm LR3E, Sfax, Tunisia; [Tarki, Meriem] Univ Carthage, Res Lab Sci & Environm Technol, ISET Borj Cedria, Carthage, Tunisia; [Dassi, Lassaad] Univ Carthage, Higher Inst Biotechnol Sfax, ISET Borj Cedria, Res Lab Sci & Environm Technol, Carthage, Tunisia
推荐引用方式 GB/T 7714	Khalfi, Chaouki,Tarki, Meriem,Dassi, Lassaad. An appraisal of Chott El Jerid brine encroachment in the Tozeur-south shallow aquifer: Geoelectrical and hydrochemical approach[J],2021,190.
APA	Khalfi, Chaouki,Tarki, Meriem,&Dassi, Lassaad.(2021).An appraisal of Chott El Jerid brine encroachment in the Tozeur-south shallow aquifer: Geoelectrical and hydrochemical approach.JOURNAL OF APPLIED GEOPHYSICS,190.
MLA	Khalfi, Chaouki,et al."An appraisal of Chott El Jerid brine encroachment in the Tozeur-south shallow aquifer: Geoelectrical and hydrochemical approach".JOURNAL OF APPLIED GEOPHYSICS 190(2021).