Nourishment of a barred nearshore: jerba, Tunis
Contenu
Boczar-Karakiewicz, B., Romanczyk, W., Long, Bernard, et Bona, J. L. 2001. « Nourishment of a Barred Nearshore: Jerba, Tunis ». In Solving Coastal Conundrums. Thomas Telford Publishing, bibliographie, consulté le 3 avril 2025, https://ibadica.org/s/bibliographie/item/26981
- Titre
- Nourishment of a barred nearshore: jerba, Tunis
- Créateur
- Boczar-Karakiewicz, B. Voir tous les contenus avec cette valeur
- Romanczyk, W. Voir tous les contenus avec cette valeur
- Long, Bernard Voir tous les contenus avec cette valeur
- Bona, J. L. Voir tous les contenus avec cette valeur
- Sujet
- Littoraux -- Djerba Voir tous les contenus avec cette valeur
- Résumé
- A project to reconstruct 9~km of sandy beaches located in the north-eastern part of Jerba Island (Tunisia) is presented. The beaches face the Mediterranean Sea, and multiple offshore sand bars are a common feature in this area. The visible and underwater parts of the beaches have been eroded by sand losses, shoreline retreats, recurrent flooding, steepened nearshore profiles and continuosly decreased volume of offshore sand bars. Erosion and degradation of the coastal dunes have resulted from recreational developments in the area. Earlier `hard' protection measures implemented, such as seawalls, ripraps, etc., failed. Our project proposes a `soft' protection method that involves supplying the lacking sediment to 'strategic' places in the nearshore zones for the restoration of their wave-dominated dynamic equilibrium. Our recommendations for the project are based on historical data, observations, field measurements and numerical simulations, using a mathematical model of wave-seabed interactions (Boczar-Karakiewicz et al. 1987), with initial data provided by field measurements of waves, currents and morphology. The model predicts the formation of longshore bars and their site-specific dynamics in response to sequences of storm events in the local wave climate, while reproducing the observed quasi-periodicity of beach erosion and recovery. The conclusions of the project recommend the nourishment of two offshore bars and reconstruction of the beaches to a width of some 70 m (their pre-erosion state). The increased volume of the nourished bars will assure protection and stable conditions for the reconstructed beaches and prevent flooding. Boczar-Karakiewicz B., Bona J.L. and Cohen D.L., 1987. Interaction of shallow-water waves and bottom topography. In: Dynamical problems in continuum physics, mathematics and its application, J.L. Bona, C. Dafermos, J. Erickson & D. Kinderlehrer, editors, Springer-Verlag, New York, IMA Series in Mathematics and its Applications, 4, 131-176.
- Est une partie de
- Solving Coastal Conundrums Voir tous les contenus avec cette valeur
- Editeur
- Thomas Telford Publishing Voir tous les contenus avec cette valeur
- Date
- 2002
- Langue
- eng
- ISBN
- 978-0-7277-4237-7
Boczar-Karakiewicz, B., Romanczyk, W., Long, Bernard, et Bona, J. L. 2001. « Nourishment of a Barred Nearshore: Jerba, Tunis ». In Solving Coastal Conundrums. Thomas Telford Publishing, bibliographie, consulté le 3 avril 2025, https://ibadica.org/s/bibliographie/item/26981
Position : 43811 (6 vues)