Assessing nature-based coastal defense
Abstract Nature-based Coastal Defense is increasingly used to reduce climate risk, because considered effective, inexpensive and cost-effective, easy to implement, and no-regrets. This article discusses this positive framing through the analysis of 23 projects implemented in French overseas territor...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-05-01
|
| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-96744-7 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850273476887183360 |
|---|---|
| author | Virginie K. E. Duvat Inès Hatton Louise Burban Alice Jacobée Myriam Vendé-Leclerc Lucile Stahl |
| author_facet | Virginie K. E. Duvat Inès Hatton Louise Burban Alice Jacobée Myriam Vendé-Leclerc Lucile Stahl |
| author_sort | Virginie K. E. Duvat |
| collection | DOAJ |
| description | Abstract Nature-based Coastal Defense is increasingly used to reduce climate risk, because considered effective, inexpensive and cost-effective, easy to implement, and no-regrets. This article discusses this positive framing through the analysis of 23 projects implemented in French overseas territories, using an ex-post expert judgment method considering enabling conditions (context, governance, funding, social acceptability), risk reduction (technical effectiveness; studies, monitoring and evaluation) and externalities (co-benefits and disbenefits; contribution to adaptation). 80% of projects aimed at reducing coastal erosion; 47.8% were implemented in natural or rural areas; 87.1% included restoration; 82.6% targeted one single ecosystem and 51.7% beach/dune systems; 47.8% were led by public actors; all relied on multiple funding sources. Performance indices range from 39.4 to 77.2%. The highest scores concern governance and social acceptability, and the lowest scores risk reduction. No project included an evaluation of risk reduction and was calibrated for future risk. Internal (i.e. project related) and external (more general) levers and barriers to effectiveness were identified. Internal barriers include the lack of political support to nature-based options, the difficulty to secure the required long-term funding and to upscale action in the face of strong land tenure constraints. |
| format | Article |
| id | doaj-art-2ff83531ef2240ecb6710012b90f5be3 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-2ff83531ef2240ecb6710012b90f5be32025-08-20T01:51:28ZengNature PortfolioScientific Reports2045-23222025-05-0115111810.1038/s41598-025-96744-7Assessing nature-based coastal defenseVirginie K. E. Duvat0Inès Hatton1Louise Burban2Alice Jacobée3Myriam Vendé-Leclerc4Lucile Stahl5UMRi LIENSs 7266, La Rochelle Université-CNRSUMRi LIENSs 7266, La Rochelle Université-CNRSUMRi LIENSs 7266, La Rochelle Université-CNRSUMRi LIENSs 7266, La Rochelle Université-CNRSObservatoire du Littoral de Nouvelle-Calédonie/DIMENCUMRi LIENSs 7266, La Rochelle Université-CNRSAbstract Nature-based Coastal Defense is increasingly used to reduce climate risk, because considered effective, inexpensive and cost-effective, easy to implement, and no-regrets. This article discusses this positive framing through the analysis of 23 projects implemented in French overseas territories, using an ex-post expert judgment method considering enabling conditions (context, governance, funding, social acceptability), risk reduction (technical effectiveness; studies, monitoring and evaluation) and externalities (co-benefits and disbenefits; contribution to adaptation). 80% of projects aimed at reducing coastal erosion; 47.8% were implemented in natural or rural areas; 87.1% included restoration; 82.6% targeted one single ecosystem and 51.7% beach/dune systems; 47.8% were led by public actors; all relied on multiple funding sources. Performance indices range from 39.4 to 77.2%. The highest scores concern governance and social acceptability, and the lowest scores risk reduction. No project included an evaluation of risk reduction and was calibrated for future risk. Internal (i.e. project related) and external (more general) levers and barriers to effectiveness were identified. Internal barriers include the lack of political support to nature-based options, the difficulty to secure the required long-term funding and to upscale action in the face of strong land tenure constraints.https://doi.org/10.1038/s41598-025-96744-7Ecosystem-based adaptationNature-based solutionsCoastal risk reductionStructured expert judgmentClimate changeSmall Islands |
| spellingShingle | Virginie K. E. Duvat Inès Hatton Louise Burban Alice Jacobée Myriam Vendé-Leclerc Lucile Stahl Assessing nature-based coastal defense Scientific Reports Ecosystem-based adaptation Nature-based solutions Coastal risk reduction Structured expert judgment Climate change Small Islands |
| title | Assessing nature-based coastal defense |
| title_full | Assessing nature-based coastal defense |
| title_fullStr | Assessing nature-based coastal defense |
| title_full_unstemmed | Assessing nature-based coastal defense |
| title_short | Assessing nature-based coastal defense |
| title_sort | assessing nature based coastal defense |
| topic | Ecosystem-based adaptation Nature-based solutions Coastal risk reduction Structured expert judgment Climate change Small Islands |
| url | https://doi.org/10.1038/s41598-025-96744-7 |
| work_keys_str_mv | AT virginiekeduvat assessingnaturebasedcoastaldefense AT ineshatton assessingnaturebasedcoastaldefense AT louiseburban assessingnaturebasedcoastaldefense AT alicejacobee assessingnaturebasedcoastaldefense AT myriamvendeleclerc assessingnaturebasedcoastaldefense AT lucilestahl assessingnaturebasedcoastaldefense |