Groundwater salinization processes in shallow coastal aquifer of Djeffara plain of Medenine, Southeastern Tunisia

Trabelsi, Rim; Abid, Kamel; Zouari, Kamel; Yahyaoui, Houcine

doi:10.1007/s12665-011-1273-8

Cited by 54 publications

(14 citation statements)

References 21 publications

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“…The mean annual maximum temperature is over 36°C. The cumulative annual precipitation is generally below 190 mm (Trabelsi, Abid, Zouari, & Yahyaoui, 2012). Collected field data, consisting of two entities: linear (GPS track log, orange colour) and GPS point data with description (black triangles).…”

Section: Study Areamentioning

confidence: 99%

Spatiotemporal and spectral analysis of sand encroachment dynamics in southern Tunisia

Afrasinei

Melis

Arras

et al. 2018

European Journal of Remote Sensing

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Aeolian processes in drylands often transcend into sand encroachment, a common form of land degradation. Highly reflective desert features, hence sandy areas, often cause spectral confusion, and mapping through remote sensing techniques can be challenging. This work aims at designing an efficient classification method that minimises spectral confusion of desert features, hence two types of sandy areas. Moreover, we employ land cover (LC) change detection over the last 30 years. The extraction and spatiotemporal variations of LC and sand encroachment areas in the Dahar-Jeffara Medenine site (southeastern Tunisia) are assessed by employing Landsat imagery (1984 and 2014), a 30 m digital elevation model of Shuttle Radar Topography Mission (SRTMGL 1 arc second), field data and X-ray diffraction analyses of sand samples. Five new spectral indices were designed and employed in a Decision Tree (DT) classifier for the extraction of 11 LC classes, including two different types of sandy areas. The DT map yielded an overall accuracy of around 89%. Change detection results showed substantial change in several landscape components and an increase of sand units by 29% within the Jeffara-Medenine plain over the last three decades. Geomorphological observations and multi-temporal, spectral and mineral analyses indicate a main, possible in-situ source area of sand. ARTICLE HISTORY

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Section: Study Areamentioning

confidence: 99%

Spatiotemporal and spectral analysis of sand encroachment dynamics in southern Tunisia

Afrasinei

Melis

Arras

et al. 2018

European Journal of Remote Sensing

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“…Its chemical analysis (Table 1) indicates a chloride alkaline composition with high HCO 3 − , suggesting that it consisted mostly of CO 2 -enriched seawater. Assuming that chloride is a conservative ion of marine origin and using the chloride mass balance through a mixing approach of seawater and fresh water (Appelo and Postma, 1994;Terzić et al, 2010;Trabelsi et al, 2012) it has been estimated that seawater represents 66% of the CdM water. This confirms a well known phenomenon of the Fiumicino area, i.e.…”

Section: Water Chemistrymentioning

confidence: 99%

Gas blowout from shallow boreholes near Fiumicino International Airport (Rome): Gas origin and hazard assessment

et al. 2015

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“…Some faults may have a strong influence in the hydrochemistry of the groundwater by acting as preferential flow channels of diapir ascension or seawater intrusion. Groundwater salinization may be caused by simultaneous sources of diapirism and seawater intrusion, as has been observed in other coastal aquifers in the Mediterranean basin (Mongelli et al 2013;Trabelsi et al 2012). As seawater intrusion can be observed very far from the coast inland, sometimes at 8 km (de Montety et al 2008), it is challenging to distinguish diapiric and sea origins.…”

Section: Contributions To the Hydrogeological Conceptual Model Of Thementioning

confidence: 99%

Contributions of hydrogeophysics to the hydrogeological conceptual model of the Albufeira-Ribeira de Quarteira coastal aquifer in Algarve, Portugal

et al. 2015

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Geoelectrical and electromagnetic (time and frequency domains) hydrogeophysical methods were applied and jointly interpreted together with auxiliary information such as regional piezometric maps, borehole lithological logs and offshore data. The objective was to retrieve the structure and geometry of the AlbufeiraRibeira de Quarteira coastal aquifer system (Algarve, Portugal) and to upgrade the current hydrogeological conceptual model. The results allowed for the detection of the freshwater-saltwater interface along the coastline and identification of the water-bearing layers and aquitards and their hydraulic relationships. An explanation for the location of the inter-and subtidal fresh groundwater discharge is also presented and a new modeling unit is proposed for groundwater flow modeling. Limitations of the used hydrogeophysical methods are indicated and recommendations are made for follow-up studies.

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Groundwater salinization processes in shallow coastal aquifer of Djeffara plain of Medenine, Southeastern Tunisia

Cited by 54 publications

References 21 publications

Spatiotemporal and spectral analysis of sand encroachment dynamics in southern Tunisia

Spatiotemporal and spectral analysis of sand encroachment dynamics in southern Tunisia

Gas blowout from shallow boreholes near Fiumicino International Airport (Rome): Gas origin and hazard assessment

Contributions of hydrogeophysics to the hydrogeological conceptual model of the Albufeira-Ribeira de Quarteira coastal aquifer in Algarve, Portugal

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