Articles | Volume 15, issue 9
https://doi.org/10.5194/nhess-15-1973-2015
https://doi.org/10.5194/nhess-15-1973-2015
Research article
 | 
08 Sep 2015
Research article |  | 08 Sep 2015

Detailed quantification of delta subsidence, compaction and interaction with man-made structures: the case of the NCA airport, France

O. Cavalié, A. Sladen, and M. Kelner

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Short summary
We used InSAR to measure the Var delta subsidence (with a 1-σ error of 0.25 mm/yr, what might be the best documented delta deformation) that includes the NCA airport platform, located on reclaimed lands. We found that subsidence affects that whole delta and is primarily caused by the compaction of the delta quaternary sedimentary wedge. On the NCA platform, the subsidence rate reaches up to 10 mm/yr and represents a serious threat as it overlooks the steep submarine slopes of the shelf break.
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