Spatiotemporal Trends of Bora Bora’s Shoreline Classification and Movement Using High-Resolution Imagery from 1955 to 2019
Emma Gairin
(1, 2, 3, 4)
,
Antoine Collin
(3, 4)
,
Dorothée James
(3, 4)
,
Tehani Maueau
,
Yoann Roncin
,
Lucas Lefort
,
Franck Dolique
(5, 6)
,
Matthieu Jeanson
(7, 8)
,
David Lecchini
(9, 10)
1
ENS-PSL -
École normale supérieure - Paris
2 Okinawa Institute of Science and Technology Graduate University
3 LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554
4 EPHE - École Pratique des Hautes Études
5 UA - Université des Antilles
6 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques
7 UR - Université de La Réunion
8 CUFR - Centre Universitaire de Formation et de Recherche de Mayotte
9 LabEX CORAIL - Laboratoire d'Excellence CORAIL
10 CRIOBE - Centre de recherches insulaires et observatoire de l'environnement
2 Okinawa Institute of Science and Technology Graduate University
3 LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554
4 EPHE - École Pratique des Hautes Études
5 UA - Université des Antilles
6 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques
7 UR - Université de La Réunion
8 CUFR - Centre Universitaire de Formation et de Recherche de Mayotte
9 LabEX CORAIL - Laboratoire d'Excellence CORAIL
10 CRIOBE - Centre de recherches insulaires et observatoire de l'environnement
Antoine Collin
- Fonction : Auteur
- PersonId : 11522
- IdHAL : antoine-collin
- ORCID : 0000-0001-9559-7572
Dorothée James
- Fonction : Auteur
- PersonId : 21164
- IdHAL : dorothee-james
- ORCID : 0000-0002-7477-3458
Tehani Maueau
- Fonction : Auteur
Yoann Roncin
- Fonction : Auteur
Lucas Lefort
- Fonction : Auteur
Franck Dolique
- Fonction : Auteur
- PersonId : 183932
- IdHAL : franck-dolique
- ORCID : 0000-0002-7346-221X
- IdRef : 09043174X
Matthieu Jeanson
- Fonction : Auteur
- PersonId : 20400
- IdHAL : matthieu-jeanson
- ORCID : 0000-0001-8853-6595
- IdRef : 142343269
David Lecchini
- Fonction : Auteur
- PersonId : 1194331
- ORCID : 0000-0002-6347-1112
- IdRef : 191538345
Résumé
Coastal urbanisation is a widespread phenomenon throughout the world and is often linked to increased erosion. Small Pacific islands are not spared from this issue, which is of great importance in the context of climate change. The French Polynesian island of Bora Bora was used as a case study to investigate the historical evolution of its coastline classification and position from 1955 to 2019. A time series of very high-resolution aerial imagery was processed to highlight the changes of the island’s coastline. The overall length of natural shores, including beaches, decreased by 46% from 1955 to 2019 while human-made shores such as seawalls increased by 476%, and as of 2019 represented 61% of the coastline. This evolution alters sedimentary processes: the time series of aerial images highlights increased erosion in the vicinity of seawalls and embankments, leading to the incremental need to construct additional walls. In addition, the gradual removal of natural shoreline types modifies landscapes and may negatively impact marine biodiversity. Through documenting coastal changes to Bora Bora over time, this study highlights the impacts of human-made structures on erosional processes and underscores the need for sustainable coastal management plans in French Polynesia.
Domaines
Anthropologie biologiqueFormat du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Spatiotemporal Trends of Bora Bora’s Shoreline Classification and Movement Using High-Resolution Imagery from 1955 to 2019
|
Résumé |
en
Coastal urbanisation is a widespread phenomenon throughout the world and is often linked to increased erosion. Small Pacific islands are not spared from this issue, which is of great importance in the context of climate change. The French Polynesian island of Bora Bora was used as a case study to investigate the historical evolution of its coastline classification and position from 1955 to 2019. A time series of very high-resolution aerial imagery was processed to highlight the changes of the island’s coastline. The overall length of natural shores, including beaches, decreased by 46% from 1955 to 2019 while human-made shores such as seawalls increased by 476%, and as of 2019 represented 61% of the coastline. This evolution alters sedimentary processes: the time series of aerial images highlights increased erosion in the vicinity of seawalls and embankments, leading to the incremental need to construct additional walls. In addition, the gradual removal of natural shoreline types modifies landscapes and may negatively impact marine biodiversity. Through documenting coastal changes to Bora Bora over time, this study highlights the impacts of human-made structures on erosional processes and underscores the need for sustainable coastal management plans in French Polynesia.
|
Auteur(s) |
Emma Gairin
1, 2, 3, 4
, Antoine Collin
3, 4
, Dorothée James
3, 4
, Tehani Maueau
, Yoann Roncin
, Lucas Lefort
, Franck Dolique
5, 6
, Matthieu Jeanson
7, 8
, David Lecchini
9, 10
1
ENS-PSL -
École normale supérieure - Paris
( 59704 )
- 45, Rue d'Ulm - 75230 Paris cedex 05
- France
2
Okinawa Institute of Science and Technology Graduate University
( 352332 )
- Japon
3
LETG -
Littoral, Environnement, Télédétection, Géomatique UMR 6554
( 1088630 )
- Institut Universitaire Européen de la Mer - Technopôle Brest-Iroise - Place Nicolas Copernic 29280 Plouzané
- France
4
EPHE -
École Pratique des Hautes Études
( 110691 )
- 4-14 Rue Ferrus, 75014 Paris
- France
5
UA -
Université des Antilles
( 524399 )
- Université des Antilles | Fouillole - BP 250 - 97157 Pointe-à-Pitre
- France
6
BOREA -
Biologie des Organismes et Ecosystèmes Aquatiques
( 542153 )
- Muséum national d'Histoire naturelle - 7, rue Cuvier - CP 32 - 75231 Paris Cedex 05
- France
7
UR -
Université de La Réunion
( 300316 )
- 15, avenue René Cassin - CS92003 -97744 Saint Denis Cedex 9
- La Réunion
8
CUFR -
Centre Universitaire de Formation et de Recherche de Mayotte
( 524564 )
- Route nationale 3
BP 53
97660 Dembeni
- France
9
LabEX CORAIL -
Laboratoire d'Excellence CORAIL
( 209113 )
- 58 avenue Paul Alduy 66860 Perpignan CEDEX - Tél. : 04 30 19 23 32 - contact@labex-corail.fr
- France
10
CRIOBE -
Centre de recherches insulaires et observatoire de l'environnement
( 107006 )
- BP 1013 Papetoiai 98729 PAPETOAI
- France
|
Licence |
Paternité
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2021-11
|
Volume |
13
|
Numéro |
22
|
Page/Identifiant |
4692
|
Domaine(s) |
|
Projet(s) ANR |
|
Mots-clés |
en
Coast, Erosion, Urbanisation, Airborne imagery, Spaceborne imagery, French Polynesia
|
DOI | 10.3390/rs13224692 |
Origine :
Publication financée par une institution
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