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

Cavalié, O.; Sladen, A.; Kelner, M.

doi:10.5194/nhess-15-1973-2015

Articles | Volume 15, issue 9

https://doi.org/10.5194/nhess-15-1973-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/nhess-15-1973-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 9

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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Jun 2015	21	25	2	48
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Oct 2015	32	21	3	56
Nov 2015	31	19	3	53
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Jan 2016	20	14	2	36
Feb 2016	13	15	2	30
Mar 2016	8	9	0	17
Apr 2016	9	13	1	23
May 2016	5	9	1	15
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Jul 2016	5	1	4	10
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Sep 2016	12	5	0	17
Oct 2016	8	2	0	10
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Jan 2017	10	13	0	23
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Mar 2017	18	6	1	25
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Jun 2017	16	8	0	24
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Aug 2017	9	14	1	24
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Oct 2017	6	14	0	20
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Jan 2018	13	24	1	38
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Nov 2019	7	4	1	12
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Jan 2022	7	14	0	21
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Apr 2022	5	2	1	8
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Aug 2023	14	1	2	17
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Oct 2023	8	8	3	19
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Jan 2024	10	3	1	14
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Apr 2024	22	8	3	33
May 2024	17	13	2	32
Jun 2024	34	8	1	43
Jul 2024	18	19	4	41
Aug 2024	15	7	4	26
Sep 2024	14	7	1	22
Oct 2024	18	6	1	25
Nov 2024	7	5	0	12
Dec 2024	17	8	1	26
Jan 2025	16	13	0	29
Feb 2025	25	11	1	37
Mar 2025	26	11	1	38
Apr 2025	9	12	2	23
May 2025	25	9	0	34
Jun 2025	31	21	1	53
Jul 2025	30	21	1	52
Aug 2025	20	11	2	33
Sep 2025	19	11	2	32
Oct 2025	22	15	2	39
Nov 2025	31	17	2	50

Cumulative views and downloads (calculated since 11 Jun 2015)

Month	HTML	PDF	XML	Total
Jun 2015	21	25	2	48
Jul 2015	20	9	1	30
Aug 2015	12	12	1	25
Sep 2015	30	35	2	67
Oct 2015	32	21	3	56
Nov 2015	31	19	3	53
Dec 2015	7	27	0	34
Jan 2016	20	14	2	36
Feb 2016	13	15	2	30
Mar 2016	8	9	0	17
Apr 2016	9	13	1	23
May 2016	5	9	1	15
Jun 2016	6	4	1	11
Jul 2016	5	1	4	10
Aug 2016	4	6	1	11
Sep 2016	12	5	0	17
Oct 2016	8	2	0	10
Nov 2016	8	5	1	14
Dec 2016	6	6	0	12
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Feb 2017	4	5	0	9
Mar 2017	18	6	1	25
Apr 2017	14	11	1	26
May 2017	15	9	0	24
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Oct 2017	6	14	0	20
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Jul 2018	4	8	2	14
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Apr 2021	10	8	0	18
May 2021	8	9	1	18
Jun 2021	3	6	1	10
Jul 2021	5	7	0	12
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Jan 2023	9	12	1	22
Feb 2023	13	6	0	19
Mar 2023	15	8	0	23
Apr 2023	7	7	0	14
May 2023	11	14	3	28
Jun 2023	17	4	0	21
Jul 2023	7	3	1	11
Aug 2023	14	1	2	17
Sep 2023	14	7	0	21
Oct 2023	8	8	3	19
Nov 2023	1	0	1
Dec 2023	9	4	0	13
Jan 2024	10	3	1	14
Feb 2024	11	8	3	22
Mar 2024	15	7	3	25
Apr 2024	22	8	3	33
May 2024	17	13	2	32
Jun 2024	34	8	1	43
Jul 2024	18	19	4	41
Aug 2024	15	7	4	26
Sep 2024	14	7	1	22
Oct 2024	18	6	1	25
Nov 2024	7	5	0	12
Dec 2024	17	8	1	26
Jan 2025	16	13	0	29
Feb 2025	25	11	1	37
Mar 2025	26	11	1	38
Apr 2025	9	12	2	23
May 2025	25	9	0	34
Jun 2025	31	21	1	53
Jul 2025	30	21	1	52
Aug 2025	20	11	2	33
Sep 2025	19	11	2	32
Oct 2025	22	15	2	39
Nov 2025	31	17	2	50

Latest update: 29 Nov 2025

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.