Video monitoring of soft Coastal defenses at the lido of Sète, France - BRGM - Bureau de recherches géologiques et minières Access content directly
Conference Papers Year : 2015

Video monitoring of soft Coastal defenses at the lido of Sète, France


The feedback on soft techniques against erosion is nowadays rare, and does not permit to fully understand why such a system is efficient or not, and thus its applicability to similar environments. The site of the Lido of Sete is currently evaluating these techniques and thus provided an exceptional laboratory to analyze coastal behavior associated with soft defenses. An Argus video monitoring system was deployed in 2011 to survey this area. The monitoring before, during and after the management works permitted to describe the natural evolution of the beach and nearshore area, and the morphological response following the deployment of a submerged geotextile wave breaker. The bar system, characterized by well-developed crescentic patterns was linearized and progressively rotated to become parallel to the geotextile. Consequently, the beach began the same rotation, inducing a shoreline advance of 15m. After this period of adaptation, the system of bar/shoreline remained quite stable, and morphological response to storm events significantly decreased as it was observed during the storm of November 2014. These results indicate a quite efficient response of the site to the deployment of the geotextile. Additional surveys of the wave breaker state are currently undertaken by the local authority to obtain a full feedback on the resistance and durability of this kind of protection against coastal erosion.

Dates and versions

hal-01225558 , version 1 (06-11-2015)



Yann Balouin, F. Longueville, Yohan Colombet,. Video monitoring of soft Coastal defenses at the lido of Sète, France. Coastal and Maritime Mediterranean Conference, 2015, Ferrara, Italy. ⟨10.5150/cmcm.2015.038⟩. ⟨hal-01225558⟩


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