干旱区生态环境知识资源中心(Arid): Hydrogeochemical and isotopic characteristics of emerging springs in southeastern Tunisia

Arid

DOI	10.1007/s12665-022-10337-5
	Hydrogeochemical and isotopic characteristics of emerging springs in southeastern Tunisia
	Essamin, Radhia; Kamel, Samir
通讯作者	Essamin, R
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2022
卷号	81 期号:7
英文摘要	In the present study, an integration of a hydrogeochemical investigation involving multivariate statistical analysis was conducted to identify the main processes governing spring water geochemistry in southeastern Tunisia. Springs geochemical composition is mainly controlled by water-rock interaction, dissolution of evaporite minerals, evaporation, and ion exchange reactions. The principal component analysis (PCA) confirms the dominance of the classical hydrochemical variables, originating from the natural weathering processes of sedimentary and evaporitic rocks in springs mineralization. Total dissolved solids (TDS), electrical conductivity (EC), and water quality parameters (sodium percentage, sodium adsorption ratio, magnesium hazard, permeability index, and Kelly's ratio) confirm the irrigational suitability of the springs located in the Dahar plateau. Springs located in the wettest areas of the Dahar mountains were grouped separately in Gibb's diagrams and in the PCA classification due to their low TDS values (< 866 mg/L). These springs show enrichment with stable isotopes (O-18 and H-2) composition confirming the current recharge by direct infiltration of rainwater. However, springs depleted in stable isotopes represent a probably longer residence time in the aquifer and exhibit mixing evaporation-dissolution processes. The d-excess values of springs located in the Gabes region show evidence of recharge water evaporation before infiltration. However higher values in the Dahar springs imply that rainwater is relatively less subjected to secondary evaporation during the recharge process. Results from this study demonstrate the benefits of using geochemical and isotopic data to confirm the possibility of spring water management in arid and semi-arid regions.
英文关键词	Hydrogeochemical Statistical analysis Stable isotopes Springs Water management Southeastern Tunisia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000773947100001
WOS关键词	CONTINENTAL INTERCALAIRE AQUIFER ; WATER-QUALITY ; GROUNDWATER SALINIZATION ; SALINE GROUNDWATERS ; CARBONATE AQUIFERS ; STABLE-ISOTOPES ; TRACE-ELEMENT ; DEEP AQUIFERS ; GEOCHEMISTRY ; IRRIGATION
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392442
推荐引用方式 GB/T 7714	Essamin, Radhia,Kamel, Samir. Hydrogeochemical and isotopic characteristics of emerging springs in southeastern Tunisia[J],2022,81(7).
APA	Essamin, Radhia,&Kamel, Samir.(2022).Hydrogeochemical and isotopic characteristics of emerging springs in southeastern Tunisia.ENVIRONMENTAL EARTH SCIENCES,81(7).
MLA	Essamin, Radhia,et al."Hydrogeochemical and isotopic characteristics of emerging springs in southeastern Tunisia".ENVIRONMENTAL EARTH SCIENCES 81.7(2022).