Abstract
This paper presents the theory and application of a new vulnerability method (RIHM). The method is applied on Monastir shallow aquifer system, Tunisia. The results have been concluded from other established vulnerability assessment methods DRASTIC, SINTACS and GALDIT. As known, DRASTIC and SINTACS methods are not designed for seawater intrusion contamination but are useful to build the new model approach to assess groundwater vulnerability to seawater intrusion. RIHM parameters have been concluded after performed sensitivity analysis of the most important parameters of each method. Its vulnerability data are rated into four classes and assigned equal values ranging from less than 109 to 176.
Highlights
In semiarid areas, water demands in summer seasons are almost exclusively from groundwater resources
The main objective of this study was to determine principal parameters determinant Monastir groundwater salinization, highlights the impact of seawater intrusion based on the groundwater vulnerability maps and the geochemical water quality and to better focus in groundwater management programs
The important quantity of water and the great-saturated zones reserved in little depths like north and southwest parts of the study area dominated by low vulnerability classes
Summary
Water demands in summer seasons are almost exclusively from groundwater resources. This behavior assumes the contamination of aquifer by salinization [1]. Salinization of groundwater is a result for numerous processes such as seawater intrusion, migration of saline water, evaporation, dissolution of minerals, mixing and pollution resulting from industrial, municipal, and agricultural activities [2]. The crucial issues of the over-exploitation in costal aquifer are generally delicate because they associate the notion of quantity with that of quality [3]. Seawater intrusion along irregular coastlines and under offshore
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