Geophysical and hydrochemical study of the seawater intrusion in Mediterranean semi arid zones. Case of the Korba coastal aquifer (Cap-Bon, Tunisia)

Kouzana, Lamia; Benassi, Ramdhane; Mammou, Abdallah Ben; Felfoul, Mennoubi Sfar

doi:10.1016/j.jafrearsci.2010.03.005

Cited by 99 publications

(51 citation statements)

References 19 publications

(19 reference statements)

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“…The upstream region of Al Ayn plain, west of Somâa city, is composed of Upper Miocene rocks, which correspond to the Tortonien geological age, known in Tunisia as the Somâa formation: detrital continental sediments composed mainly of an alternation of sand and conglomerates with frequent clay lenses resulting from the erosion of the top of the anticline of Abderrahmen Mountains (Colleuil 1976). The lower part of the Middle Miocene layer is composed of lenticular sandstones and marls with lignite levels belonging to the Serravalian-Tortonian era, known in Tunisia as the Saouaf formation (Kouzana et al 2010). In contrast to the neighbouring northern area, Pliocene outcrops do not exist in the study area and that was believed to be due to the widespread erosion during the Miocene orogeny (Ennabli 1980).…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

“…Quaternary outcrops consist mainly of encrusted limestone, greatly extended and rich in calcite, silica and sometimes gypsum and alumina, and frequently coloured by iron salts (Kouzana et al 2010). They are also represented by the Holocene deposits, which are formed by recent alluvia observed near Wadi Al Ayn, Wadi Daroufa, Sebkha Al Gharbya and current dunes and beaches.…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

“…This phenomenon has occurred frequently in the eastern coastal aquifer of Cap Bon since the 1990s and has been reported by several authors. In fact, seawater intrusion has been reported in Korba area, 10 km to the northeast of Wadi Al Ayn watershed (Paniconi et al 2004, Kouzana et al 2010, Zghibi et al 2011.…”

Section: Piezometric Behaviourmentioning

confidence: 99%

“…Processes and mechanisms of groundwater salinization in coastal areas have been the subject of research and investigation of several authors (Sakr 1999, Bear et al 2001, Das and Datta 2001, Oude Essink 2001, Grube et al 2002, Martinez and Bocanegra 2002, Trabelsi et al 2007, Kouzana et al 2010, Lachaal et al 2011. Most of them studied the occurrence of seawater intrusion based on modelling and simulation of the dynamic of interaction between saltwater and freshwater.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogeochemistry and groundwater salinization in an ephemeral coastal flood plain: Cap Bon, Tunisia

Chekirbane

Tsujimura

Kawachi

et al. 2013

Hydrological Sciences Journal

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The Wadi Al Ayn plain is a coastal system on the eastern coast of Cap Bon in northeastern Tunisia. The area is known for its intensive agriculture, which is based mainly on groundwater exploitation. The aim of this study is to identify the sources of groundwater salinization in the Wadi Al Ayn aquifer system and deduce the processes that drive the mineralization. Surface water and groundwater samples were taken and analysed for major ions and stable isotopes. The geochemical data were used to characterize and classify the water samples based on a variety of ion plots and diagrams. Stable isotopes are useful tools to help us understand recharge processes and to differentiate between salinity origins. The oilfield brines infiltrated from the sandy bed of Wadi Al Ayn comprise the main source of groundwater salinization in the central part of the plain, while seawater intrusion is mainly responsible for the increased salinity in the groundwater of the coastal part of the plain (at Daroufa).Key words hydrogeochemistry; stable isotopes; salinization; ephemeral coastal plain; Cap Bon; Tunisia Hydrogéochimie et salinisation des eaux souterraines d'une plaine côtière éphémère au Cap Bon, Tunisie Résumé La plaine de l'Oued Al Ayn est un système côtier appartenant à la côte orientale du Cap Bon au Nord-Est de la Tunisie. La zone est connue pour ses activités agricoles intensives principalement basées sur l'exploitation des eaux souterraines. L'objectif de ce travail est d'identifier les origines de la salinisation des eaux du système aquifère de la plaine de l'Oued Al Ayn et d'éclaircir ses mécanismes et ses processus. Les eaux de surface ainsi que les eaux souterraines ont été échantillonnées et analysées pour déterminer les teneurs des éléments chimiques majeurs et des isotopes stables. Ces données géochimiques ont servi à caractériser et classer les eaux échantillonnées en se basant sur de nombreux diagrammes et illustrations. Les isotopes stables constituent un outil efficace permettant de comprendre les processus de recharge et d'identifier les origines de la salinisation. Les saumures pétrolifères qui se sont infiltrées à travers le lit sableux de l'Oued Al Ayn constituent la cause majeure da la salinisation des eaux souterraines dans la partie centrale de la plaine, tandis que l'augmentation de la salinité des eaux souterraines dans la zone côtière de la plaine (Daroufa) est principalement due à l'intrusion marine.

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Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

Section: Piezometric Behaviourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hydrogeochemistry and groundwater salinization in an ephemeral coastal flood plain: Cap Bon, Tunisia

Chekirbane

Tsujimura

Kawachi

et al. 2013

Hydrological Sciences Journal

View full text Add to dashboard Cite

show abstract

“…According to electric sections, the Pliocene part contains a succession of saturated freshwater and brackishwater levels with, at the bottom, layers saturated with variably salty water (Kouzana et al, 2010). It is locally semi-confined due to less permeable deposits (Kerrou et al, 2010), and is the most productive aquifer of the , (Ennabli, 1980;Kerrou et al, 2010;Paniconi et al, 2001a) which is two times the total recharge.…”

Section: Hydrogeological Setting and Modelingmentioning

confidence: 99%