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Decadal beach-dune profile monitoring along a 230-km high-energy sandy coast: Aquitaine, southwest France
| dc.rights.license | open | en_US |
| dc.contributor.author | NICOLAE LERMA, Alexandre | |
| dc.contributor.author | CASTELLE, Bruno
IDREF: 087596520 | |
| dc.contributor.author | MARIEU, Vincent | |
| dc.contributor.author | ROBINET, Arthur | |
| dc.contributor.author | BULTEAU, Thomas | |
| dc.contributor.author | BERNON, Nicolas | |
| dc.contributor.author | MALLET, Cyril | |
| dc.date.accessioned | 2022-11-08T14:50:54Z | |
| dc.date.available | 2022-11-08T14:50:54Z | |
| dc.date.issued | 2022-02 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/170228 | |
| dc.description.abstractEn | Large-scale coastal monitoring programs are challenging to maintain over time but are necessary to understand and further predict complex coastal evolution and resilience. The 230 km-long Aquitaine coast is a high-energy meso-macrotidal coast composed of beach-dune systems showing dramatic morphological changes at seasonal and interannual scales. This study investigates the alongshore variability in beach-dune response based on a unique 11-year dataset of 41 spaced transects surveyed yearly in spring. The dataset is completed by interspersed autumn LiDAR surveys for seasonal analysis. Several beach-dune morphological descriptors are developed, such as beach-dune volume, beach width and different shoreline proxies delimiting the intertidal zone, the beach face and the dune face. The Aquitaine beach-dune system is characterised by a north-south gradient, from chronically eroding dunes backing low-elevation dissipative beaches in the north, to slowly accreting dunes backing wide beaches in the south, through a range of intermediate beach-dune states. Time- and spatially-averaged shoreline (dune foot position) trend is −0.5 m/year (erosion), with local variations ranging from −5.9 m/year to +2.1 m/year. During the 2013–2014 winter widespread erosion was observed, with the shoreline eroding by 13 m and 8 m on average along the Gironde and Landes coasts, respectively. This dataset provides insight into the timing, magnitude and spatial variability of beach-dune recovery from the outstandingly erosive 2013–2014 winter. We also show that local beach-dune volume is a good proxy for long-term shoreline trend. It is advocated that such large-scale coastal monitoring by means of single beach profiles spaced and distributed along 10–100 km of coast is a cheap and efficient approach to address coastal changes at regional scale, which can bring complementary information to aerial photographs interpretation to determine long-term shoreline evolution trend and thus contribute to support sustainable coastal management and planning. | |
| dc.language.iso | EN | en_US |
| dc.subject.en | Beach profile | |
| dc.subject.en | Coastal dune | |
| dc.subject.en | Erosion | |
| dc.subject.en | Long-term trend | |
| dc.subject.en | Recovery | |
| dc.subject.en | Regional variability | |
| dc.title.en | Decadal beach-dune profile monitoring along a 230-km high-energy sandy coast: Aquitaine, southwest France | |
| dc.type | Article de revue | en_US |
| dc.identifier.doi | 10.1016/j.apgeog.2022.102645 | en_US |
| dc.subject.hal | Sciences de l'environnement | en_US |
| bordeaux.journal | Applied Geography | en_US |
| bordeaux.volume | 139 | en_US |
| bordeaux.hal.laboratories | EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805 | en_US |
| bordeaux.institution | Université de Bordeaux | en_US |
| bordeaux.institution | CNRS | en_US |
| bordeaux.peerReviewed | oui | en_US |
| bordeaux.inpress | non | en_US |
| hal.identifier | hal-03831762 | |
| hal.version | 1 | |
| hal.export | false | |
| dc.rights.cc | Pas de Licence CC | en_US |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Applied%20Geography&rft.date=2022-02&rft.volume=139&rft.au=NICOLAE%20LERMA,%20Alexandre&CASTELLE,%20Bruno&MARIEU,%20Vincent&ROBINET,%20Arthur&BULTEAU,%20Thomas&rft.genre=article |
