@article{fdi:010074956,
  title = {{F}lash rip statistics from video images},
  author = {{F}loc'h, {F}. and {M}abiala, {G}. {R}. and {A}lmar, {R}afa{\¨e}l and {C}astelle, {B}. and {H}all, {N}. and {P}enhoat du, {Y}ves and {S}cott, {T}. and {D}elacourt, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he coast of the {G}ulf of {G}uinea is exposed to high-energy waves generating strong nearshore currents both driving erosion and posing a threat to recreational beach goers and fishermen. {A}long this coast, the coexistence of swash and flash rip currents at {G}rand-{P}opo beach ({B}enin) was evidenced in a previous study using a limited number of {L}agrangian drifter measurements. {I}n this paper, a method based on color processing of video images from a permanent station has been developed to detect the presence of rip currents via a change of turbidity. {R}ip current characteristics and their link with tide and wave forcing over a 7-day period are derived. {D}uring this experiment, a total of 434 events has been counted during daylight. {T}he majority of rips occurred at low tide and migrates downdrift. {F}lash rip activity is maximized for shore-normal wave incidence and mild wave conditions showing that flash rips are not driven by shear instabilities of the longshore current at this site. {H}owever, the lack of strong variability in wave forcing throughout the experiment prevents a more thorough wave-rip relationship investigation, which motivates the application of the method for a longer period with a wide wave-tide spectrum.},
  keywords = {{F}lash-rip ; video processing ; {G}rand-{P}opo beach ; erosion ; coastal ; hydrodynamics ; {BENIN} ; {ATLANTIQUE} ; {GUINEE} {GOLFE} ; {GRAND} {POPO} {PLAGE}},
  booktitle = {},
  journal = {{J}ournal of {C}oastal {R}esearch},
  numero = {81},
  pages = {100--106},
  ISSN = {0749-0208},
  year = {2018},
  DOI = {10.2112/si81-013.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074956},
}