Journal
WATER
Volume 9, Issue 6, Pages -Publisher
MDPI AG
DOI: 10.3390/w9060364
Keywords
Vietnam; South China Sea; erosion; recovery; storminess; winter monsoon; typhoons
Categories
Funding
- Vietnamese grant (MOST2/216/QD/BKHCN) [2994]
- French ANR project COASTVAR [ANR-14-ASTR-0019]
- ARTS-IRD program
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Shoreline continuously adapts to changing multi-scale wave forcing. This study investigates the shoreline evolution of tropical beaches exposed to monsoon events and storms with a case study in Vietnam, facing the South China Sea, over the particularly active 2013-2014 season, including the Cat-5 Haiyan typhoon. Our continuous video observations show for the first time that long-lasting monsoon events have more persistent impact (longer beach recovery phase) than typhoons. Using a shoreline equilibrium model, we estimate that the seasonal shoreline behavior is driven by the envelope of intra-seasonal events rather than monthly-averaged waves. Finally, the study suggests that the interplay between intra-seasonal event intensity and duration on the one hand and recovery conditions on the other might be of key significance. Their evolution in a variable or changing climate should be considered.
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