Drivers of shoreline change in atoll reef islands of the Tuamotu Archipelago, French Polynesia

Duvat, Virginie; Salvat, Bernard; Salmon, Camille

doi:10.1016/j.gloplacha.2017.09.016

Cited by 51 publications

(47 citation statements)

References 56 publications

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“…In line with previous studies (Ford and Kench, 2014;Duvat et al, 2017aDuvat et al, , 2017b, our results highlight the high spatial variability of TCs impacts. In the present case, the latter can be attributed to four main factors.…”

Section: Including Human-driven Feedback Effects In Cyclone Impact Stsupporting

confidence: 93%

“…In line with recent studies assessing tropical cyclone impacts on shoreline position and coastal morphology in small islands (Duvat and Pillet, 2017;Duvat et al, 2017aDuvat et al, , 2017b, we used the stability line as a shoreline proxy for the seaward boundary of stabilized coastal areas. This line corresponds to the edge of the vegetation in unbuilt areas and to the outer limit of coastal constructions (i.e.…”

Section: Shoreline Interpretation Digitization and Analysismentioning

confidence: 99%

“…As in previous studies, three sources of uncertainty were considered, which relate to image resolution, image georeferencing and shoreline digitization (Yates et al, 2013;Duvat et al, 2017b). The errors generated were estimated to be equal to 0.…”

Section: Uncertaintymentioning

confidence: 99%

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High human influence on beach response to tropical cyclones in small islands: Saint-Martin Island, Lesser Antilles

et al. 2019

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Using multi-date satellite imagery and field observations, this paper assesses the inferred impacts of September 2017 cyclones on the beaches of Saint-Martin Island. Twenty-two beaches out of 30 predominantly exhibited shoreline retreat, with the highest retreat value (-166.45 m) recorded on the north-eastern coast. While erosion predominated on beaches and at the sand dune front, inner areas generally exhibited accretion, with sand sheets (up to 135 m from the pre-cyclone vegetation line) indicating landward sediment transfer. Natural back-reef beaches exhibited the formation of new beach ridges, marked (up to 2 m) upward growth and alongshore beach extension. The high spatial variability of inferred impacts is attributed to the cyclone's track, coast exposure, beach configuration and, importantly, human-driven environmental change. Whereas vegetation removal exacerbated marine inundation and inhibited the vertical accretion of beaches, shoreline hardening aggravated wave-induced sediment loss while also inhibiting sediment deposition. Four beach response modes are distinguished. Based on findings, we identified three major areas of action for risk reduction and adaptation to climate change. Depending on beach response and site specificities, relocation and the determination of set-back lines, coastal buffer restoration, or engineered structures' upgrading should be prioritized.

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Section: Including Human-driven Feedback Effects In Cyclone Impact Stsupporting

confidence: 93%

Section: Shoreline Interpretation Digitization and Analysismentioning

confidence: 99%

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High human influence on beach response to tropical cyclones in small islands: Saint-Martin Island, Lesser Antilles

et al. 2019

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“…As these features can induce a stabilization of the shoreline, in line with previous studies (e.g. Duvat et al, 2017c), we used the "stability line" (SL) instead of the "vegetation line" (VL) as a shoreline proxy (Fig. 4a, b, e).…”

Section: Shoreline Interpretation and Digitizationmentioning

confidence: 91%

Assessing the impacts of shoreline hardening on beach response to hurricanes: Saint-Barthélemy, Lesser Antilles

Pillet

Duvat

Krien

et al. 2019

Ocean & Coastal Management

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“…Atoll islands are among the most vulnerable coastal environments to sea-level rise. However, available studies on multi-decadal shoreline change showed that at current sea-level rise, most atoll reef islands (74.6%) exhibit areal stability, while 14% increased and 11.4% decreased in size (McLean et Kench, 2015;Duvat et Pillet, 2017, Duvat, Salvat andSalmon, 2017;Duvat, 2018). Collectively, these observations suggest that the continued production of biogenic sediments (including coral sand, shingle, rubble and boulders) to date has been sufficient to compensate for the effects of a 15-to-30cm sea-level since the 1950s (Becker et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Modelling the Response of Atoll Reef Islands to Multi-Millennial Sea Level Rise from the Last Glacial Maximum to the Coming 10kyr: the Case of Mururoa Atoll (Tuamotu, French Polynesia)

Cozannet

Duvat

Salvat

et al. 2018

Journal of Coastal Research

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Drivers of shoreline change in atoll reef islands of the Tuamotu Archipelago, French Polynesia

Cited by 51 publications

References 56 publications

High human influence on beach response to tropical cyclones in small islands: Saint-Martin Island, Lesser Antilles

High human influence on beach response to tropical cyclones in small islands: Saint-Martin Island, Lesser Antilles

Assessing the impacts of shoreline hardening on beach response to hurricanes: Saint-Barthélemy, Lesser Antilles

Modelling the Response of Atoll Reef Islands to Multi-Millennial Sea Level Rise from the Last Glacial Maximum to the Coming 10kyr: the Case of Mururoa Atoll (Tuamotu, French Polynesia)

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