@article{fdi:010075138,
  title = {{S}easonal variation of morphology and sediment movement on {N}ha {T}rang {C}oast, {V}ietnam},
  author = {{T}hanh, {T}. {M}. and {T}anaka, {H}. and {M}itobe, {Y}. and {V}iet, {N}. {T}. and {A}lmar, {R}afa{\¨e}l},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {N}ha {T}rang beach, an embayed sandy beach located in the southeast of {V}ietnam, is a tropical touristic coastal environment that is being threat by persistent shoreline retreat. {I}n order to investigate the processes underlying this erosive pattern, 1.5-years of video imagery, obtained from a local video system, was analyzed. {V}ideo products such as shoreline position and surf zone width (extracted from time-averaged images) were used to identify patterns of shoreline variability (using empirical orthogonal function - {EOF}) and investigate the link between the seasonal variations in the wave forcing and longshore sediment transport. {R}esults indicate that shoreline retreat occurs essentially during the winter season, when energetic northeast monsoon waves dominate. {T}he recovery phase (shoreline advance) was found to occur during the summer season, when milder south/southeast wind waves dominate. {S}horeline variability was further investigated using {EOF} analysis and results show that the first mode, which explains 89% of the observed variance, corresponds to the seasonal longshore shoreline variations. {T}his {EOF} mode was found to strongly related to the winter and summer monsoon seasons, thus reinforcing the role that seasonal changes in the wave climate play on the shoreline variations. {F}inally, the net of longshore sediment transport in {N}ha {T}rang beach was investigated using seasonal and monthly depth of closure ({D}-c) information, rather than a single fixed value of this parameter. {T}he results highlight that the use of monthly or seasonal {D}-c values allow to capture the seasonal variations in the wave climate, thus providing more realistic patterns of sediment transport in this coastal area.},
  keywords = {{N}ha {T}rang {C}oast ; {V}ietnam ; video monitoring ; beach erosion ; seasonal ; shoreline variation ; longshore sediment transport ; {VIET} {NAM} ; {NHA} {TRANG}},
  booktitle = {},
  journal = {{J}ournal of {C}oastal {R}esearch},
  numero = {81 {N}o {S}p{\'e}cial},
  pages = {22--31},
  ISSN = {0749-0208},
  year = {2018},
  DOI = {10.2112/si81-004.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075138},
}