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Communication Dans Un Congrès Année : 2022

Seismo-acoustic wave propagation generated by the detonation of UXOs of large charge weights in a shallow water environment

Anne Deschamps
David Ambrois
Fang Wang
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Xavier Demoulin
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Résumé

Unexploded historical ordnance (UXO) from World War II, that is discovered almost every week close to the French coast, must be destroyed quickly after discovery to ensure the safety of divers and ships. The favored destruction method is countermining, i.e., the use of a high-order detonation conducted by exploding an additional donor charge placed adjacent to the UXO. In the framework of a UXO countermining campaign conducted in the Rade d'Hyères (Mediterranean Sea, France) in December 2018, hydro-acoustic and seismic recording systems have been deployed to record the explosion-induced waves in water and the seismic signals on the shore, respectively (POSA project). In this expanded abstract, we present the main observations and focus on the impact of the shallow water environment (whose water depth is less than 50 m), and more specifically on the impact of the unconsolidated sedimentary layer, on the recorded signals induced by the detonation of charges with weights ranging from 80 to 680 kg TNT-equivalent. We also discuss the acoustic-to-seismic wave conversions.
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Dates et versions

hal-04161485 , version 1 (16-11-2023)

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  • HAL Id : hal-04161485 , version 1

Citer

Nathalie Favretto-Cristini, Anne Deschamps, David Ambrois, Mickaël Bonnin, Éric Beucler, et al.. Seismo-acoustic wave propagation generated by the detonation of UXOs of large charge weights in a shallow water environment. 24th International Congress on Acoustics, ICA 2022, Oct 2022, Gyeongju, South Korea. pp.188000. ⟨hal-04161485⟩
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