Maupiti Hoe 2018
Maupiti ("the Stuck Twins'') is a diamond-shaped island located in the western part of the Society archipelago in French Polynesia. The present study focuses on the data recovered over a single cross-barrier transect located in the south-west barrier during the MAUPITI HOE field campaign, from 5 to 18 July 2018. The studied area is representative of the reef structure observed along the 4km-long southwestern barrier reef, showing an alongshore-uniform structure exposed to swell approaching with weak incident angles, a healthy reef colony. In the cross-barrier direction, the reef displays a clear partitioning of bottom roughness that ranges from low-crested compact structures at the reef crest to higher and sparser coral bommies on the backreef. The experimental setup was specifically designed to analyse and differentiate the dynamics over three roughness-contrasting sections found over the barrier reef.
The scientific objectives of the project MAUPITI HOE are to understand the hydrodynamics of an archetypal reef-lagoon system of a high volcanic reef island. The physical functioning of the hydrosystem involves a fine coupling between water levels, waves (including wind, infragravity and VLF waves), currents and seabed structure (reef roughness).
Four pressure sensors (OSS3, OSS4, OSS5, OSS6) have been deployed across the reef flat/ backreef, outside the surf zone. The bottom pressure is measured continuously at 10 Hz, and are converted into free surface elevation assuming hydrostaticity.
An electrocurrent meter S4 provides the wave forcing while AQP1 is a velocity profiler providing the transports.
The bed profile is obtained from the combination of (I) boat survey in the deeper part and (ii) high resolution GNSS RTK topography by feet.
Two datasets are available: one is concerning the mean parameters linked to the reef barrier dynamics, and the second dataset is concerning the wave friction.
Simple
- Date (Publication)
- 2021-08-24T11:00:00
- Citation identifier
- http://dataset.osupytheas.fr/geonetwork/srv/resources7d538d6b-dd15-42af-9de7-c9eac27a840d
- Purpose
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High-resolution experimental survey of the Maupiti Island reef-lagoon system
- Status
- Historical archive
- Maintenance and update frequency
- Not planned
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GEMET - Concepts, version 2.4
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environment
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geophysical environment
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data acquisition
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spatial distribution
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monitoring data
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geo-referenced data
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environmental analysis
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environmental research
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environmental data
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experiment
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research project
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scientific research
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erosion
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field experiment
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hydrosphere
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geomorphic process
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sea
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GEMET - INSPIRE themes, version 1.0
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Meteorological geographical features
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Sea regions
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Continents, countries, sea regions of the world.
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French Polynesia
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France
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Oceania
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- Theme
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coral reef
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circulation
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waves
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bed roughness
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- Access constraints
- Copyright
- Use constraints
- otherRestictions
- Spatial representation type
- Vector
- Denominator
- 5000
- Language
- English
- Character set
- UTF8
- Topic category
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- Oceans
- Environment
- Climatology, meteorology, atmosphere
- Geoscientific information
- Begin date
- 2018-07-05
- End date
- 2018-07-19
- Description
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Southeast Pacific Ocean (140W)
- Supplemental Information
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Maupiti, french polynesia
- Reference system identifier
- WGS 1984
- Hierarchy level
- Dataset
- Statement
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The experimental strategy was to deploy a series of bottom-moored pressure sensors across the reef barrier to study the cross-reef evolution of wave energy and water level and a velocity profiler in the lagoon to quantify the cross-reef transport. The recovered data allowed to estimate the main terms of the wave-averaged depth-averaged momentum balance.
- File identifier
- 9db3bec4-0bbf-4531-8864-f100c4b8eced XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2022-11-16T16:15:58
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0