Preprints
https://doi.org/10.5194/egusphere-2022-1113
https://doi.org/10.5194/egusphere-2022-1113
27 Jan 2023
 | 27 Jan 2023

28 years of coastal subsidence evolution on the slow-moving Nice-Côte d’Azur airport area (France) revealed by InSAR: Insights into the deformation mechanism

Olivier Cavalié, Frédéric Cappa, and Béatrice Pinel-Puysségur

Abstract. Coastal areas can be tremendously biodiverse and host as well a substantial part of the world population and many critical infrastructures. However, there are often fragile environments and face various hazards as flooding, coast erosion, land salinization or pollution, earthquake-induced land motions, or anthropogenic processes. In this article, we investigate the stability of the Nice-Côte d’Azur airport that has been built on reclaimed land in the Var river delta (French Riviera, France). This infrastructure is 5 a permanent concern since the partial collapse of the platform in 1979 and the on-going subsidence of the airport runways. Here, we used the full archive of ESA SAR images from 1992 to 2020 to comprehensively monitor the dynamics of the airport subsidence.We find that maximum downward motion rate is slowing down from 16 mm/yr in the 1990s to 8 mm/yr today. However, sediment compaction is still active and an acceleration phase of the continuous creep leading to a potential failure of a part of the platform cannot be excluded. Our study demonstrates the importance of remotely monitoring 10 of the platform to better understand coastal land motions, which will ultimately help evaluate and reduce associated hazards.

Journal article(s) based on this preprint

10 Oct 2023
Three decades of coastal subsidence in the slow-moving Nice Côte d'Azur Airport area (France) revealed by InSAR (interferometric synthetic-aperture radar): insights into the deformation mechanism
Olivier Cavalié, Frédéric Cappa, and Béatrice Pinel-Puysségur
Nat. Hazards Earth Syst. Sci., 23, 3235–3246, https://doi.org/10.5194/nhess-23-3235-2023,https://doi.org/10.5194/nhess-23-3235-2023, 2023
Short summary

Olivier Cavalié et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1113', Anonymous Referee #1, 15 Feb 2023
    • AC1: 'Reply on RC1', Olivier Cavalié, 07 Mar 2023
  • RC2: 'Comment on egusphere-2022-1113', Anonymous Referee #2, 16 Feb 2023
    • AC2: 'Reply on RC2', Olivier Cavalié, 07 Mar 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1113', Anonymous Referee #1, 15 Feb 2023
    • AC1: 'Reply on RC1', Olivier Cavalié, 07 Mar 2023
  • RC2: 'Comment on egusphere-2022-1113', Anonymous Referee #2, 16 Feb 2023
    • AC2: 'Reply on RC2', Olivier Cavalié, 07 Mar 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Reconsider after major revisions (further review by editor and referees) (11 Apr 2023) by Margreth Keiler
AR by Olivier Cavalié on behalf of the Authors (07 May 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (09 May 2023) by Margreth Keiler
RR by Anonymous Referee #2 (22 May 2023)
RR by Anonymous Referee #3 (29 Jun 2023)
ED: Publish subject to minor revisions (review by editor) (04 Jul 2023) by Margreth Keiler
AR by Olivier Cavalié on behalf of the Authors (12 Jul 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish subject to minor revisions (review by editor) (26 Jul 2023) by Margreth Keiler
AR by Olivier Cavalié on behalf of the Authors (28 Jul 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (23 Aug 2023) by Margreth Keiler
AR by Olivier Cavalié on behalf of the Authors (29 Aug 2023)

Journal article(s) based on this preprint

10 Oct 2023
Three decades of coastal subsidence in the slow-moving Nice Côte d'Azur Airport area (France) revealed by InSAR (interferometric synthetic-aperture radar): insights into the deformation mechanism
Olivier Cavalié, Frédéric Cappa, and Béatrice Pinel-Puysségur
Nat. Hazards Earth Syst. Sci., 23, 3235–3246, https://doi.org/10.5194/nhess-23-3235-2023,https://doi.org/10.5194/nhess-23-3235-2023, 2023
Short summary

Olivier Cavalié et al.

Olivier Cavalié et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
Coastal areas are fragile ecosystems that face multiple hazards. In this study, we measured the downward motion of the Nice-Côte d'Azur airport (Nice, France) that has been built on reclaimed area and found that it subsides from 16 mm/yr in the 1990s to 8 mm/yr today. A continuous remotely monitoring of the platform will provide key data for a detailed investigation of future subsidence maps and their contribution will help to evaluate the potential failure of a part of the airport platform.