Bathymetry of the lagoon and hoa of Reao, Tuamotu Archipelago

Bathymetric data were acquired in Reao Atoll, a semi-enclosed atoll lagoon without reef pass but connected to ocean through numerous shallow spillways (known locally as "hoa") along its southern rim. This data was acquired as part of the GAIA (ManaGement strAtegy evaluatIon for small-scale fisheries in Atoll lagoons) project, which evaluates the sustainability of giant clam exploitation within the context of climate change.

The lagoon of Reao is composed of three basins with varying depths (the NW basin being the shallowest and the SE basin the deepest). Bathymetric data were acquired from 29/04/2022 to 04/05/2022, within the lagoon with a Multibeam echo sounder IWBMS (NORBIT), and resampled at 5 m spatial resolution. Satellite-derived-bathymetry (SDB) at 10 m spatial resolution was established by coupling this bathymetric data with a Sentinel-2B image captured on 26/09/2020 and using the « Iterative Multi Band Ratio » technique (detailed methodology is described in Quéré et al. 2025). Finally, bathymetric surveys were carried out to characterize the nine most functional hoa of the atoll. One bathymetric survey was carried out in the longitudinal section of each hoa, while one or two surveys were carried out in their cross-sections. 

 
Citation proposal
Quéré Robin (Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, CNRS, UMR 9220 ENTROPIE, 98800 Nouméa, New Caledonia) - Friot Christian (GEOPOLYNESIE, Papeete, Tahiti, French Polynesia) - VAN WYNSBERGE Simon (Ifremer, IRD, ILM, UPF, UMR 241 SECOPOL, Vairao, 98725, Tahiti, French Polynesia) - LE GENDRE Romain (Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, CNRS, UMR 9220 ENTROPIE, 98800 Nouméa, New Caledonia) (2025) . Bathymetry of the lagoon and hoa of Reao, Tuamotu Archipelago. https://services.mspdata.eu:/geonetwork/srv/api/records/seanoe:108293

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Date ( Publication )
2025-08-25
Date ( Revision )
2025-09-19
Other citation details
Quéré Robin, Friot Christian, Van Wynsberge Simon, Le Gendre Romain (2025). Bathymetry of the lagoon and hoa of Reao, Tuamotu Archipelago. SEANOE. https://doi.org/10.17882/108293
Credit
<p>We would like to thank the municipality of Reao for their agreement and interest in this study. We would also like to thank Taihopu and Rosalie Teaka, as well as Armand Tefau for their logistical support in carrying out the bathymetric surveys.</p>

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Keywords ( Theme )
  • French Polynesia , Tuamotu , Reao atoll , bathymetry , hoa , GAIA Project , Physical oceanography
SeaDataNet Parameter Disciplines ( parameter )
  • Physical oceanography
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Other constraints
<p>The authors accept no liability for any use of the data that is inappropriate in view of its uncertainty</p>
Date ( Publication )
2025

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Association Type
Cross reference
Initiative Type
dataset
Metadata language
English
Topic category
  • Oceans
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Distribution format
  • CSV ( )

OnLine resource
Quality controlled data  

Bathymetry_lagoon_5m - 9 MB

OnLine resource
Processed data  

SDB_lagoon_10m - 21 MB

OnLine resource
Quality controlled data  

Bathymetry_hoa - 95 KB

OnLine resource
DOI of the product  
OnLine resource
Seanoe  
Hierarchy level
Dataset
Statement
Multibeam echo sounder IWBMS (NORBIT)

Metadata

File identifier
seanoe:108293   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2025-09-19
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0

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Satellite-derived-bathymetry (spatial resolution: 10 m) of Reao's lagoon

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