Sensor installation in Tunisia

On July 29, 2020 the Tunisian MEDSAL team installed two multi-parameter sensors in the Bouficha aquifer situated in north east of Tunisia. This aquifer is characterized by its location near the sea and by the presence of a chain of Mountains. It’s in the low plain of Bouficha, between latitude 36 ° 20 ‘North and longitude 10 ° 20’ East, and it has a 123,492-ha watershed area.

The major recharge source for the Bouficha aquifer has been considered resulting from the infiltration of surface runoff in the wadi-beds. The Oued Rmel wadi has been considered to play a vital role in feeding the Bouficha aquifer.
Abstraction through wells to satisfy socio-economic needs is much more important than natural discharge. The amount of groundwater abstraction has increased since the 1990s due to the great population growth in the Bouficha region as well as the increase in agricultural activities.
Regarding groundwater discharge from this aquifer occurs through natural as well as by artificial means. The presence of natural groundwater discharge has been evident in the Mediterranean Sea and Sebkha Sidi Khalifa in the SW of the aquifer. During the dry season, evaporation is also an important discharge component, especially in the coastal part of Bouficha, where groundwater is close to the surface.

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Bouficha 36.302700, 10.451100 Bouficha aquifer

The sensors were installed in two wells named Belgacem Ben Rhouma (Coordinate in UTM              X = 630562.3m Y = 4023098.043 ; depth : 30m) Ahmed Chibani (Coordinates in UTM X = 636139.75 Y = 4027503.69 ; depth :  17m). The two chosen wells for the installation of a multiparameter sonde for the real-time monitoring of groundwater are used mainly for irrigation. The electrical conductivity of the first well was found to be 2000 µs/cm and of the second well 6740 µs/cm.