Abstract
The coast of Aghir is located on the south-eastern side of Jerba island. Since the 1980s, this area has been subjected to disturbance, especially after its integration within the tourist program schedule. The monitoring of the coastal evolution between 1972 and 2013 indicates an average retreat of the coastline estimated at 1.2 to 16 m/year between 1972 and 1985. After the construction of a dike in 1997, the upstream beach was fattened up and evolved to equilibrium while the shelter site has undergone a fast silting up, especially since the opening of the pass in 1999. The accumulation of sand is highlighted by the occurrence of concentric-shaped bodies in front of the pass and the widening of the former eroded beach (up to 16 m/year between 1999 and 2008). In 2010, the readjustment of the piers upstream of the dike seems to have reduced the amounts of sand on either side of the dike. Sediments are made of shelly sands dominated by fine- to mean-sized particles, deposited by gyratory currents of moderate to low energy inside the shelter site. Downstream this site, sedimentation is dominated by coarse sands deposited by strong longitudinal currents.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call