@article{fdi:010072074,
  title = {{A}ssessing the performance of a low-cost method for video-monitoring the water surface and bed level in the swash zone of natural beaches},
  author = {{I}baceta, {R}. and {A}lmar, {R}afa{\¨e}l and {C}atalan, {P}. {A}. and {B}lenkinsopp, {C}. {E}. and {A}lmeida, {L}. {P}. and {C}ienfuegos, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} method to continuously measure bed and water levels along a cross- shore transect of vertical poles is evaluated. {T}his remote sensing based method uses video imagery of swash flows propagating past an array of vertical poles buried on the beach face. {U}sing datasets collected at two beaches in {C}hile, the method is compared against measurements obtained with conventional co- localized instruments: {L}i{DAR} and ultrasonic distance meters. {T}he present video swash pole technique shows good skill in retrieving swash zone bed level and water levels, while providing the possibility to measure morphological variations at time scales varying from wave groups ( tens of seconds) to hours. {D}iscrepancies between video and ultrasonic distance meters are found when short time scales are used, for both depositional and erosion events, but longer duration trends are captured well. {W}ater surface elevations at the wave- by- wave scale proved to be accurate for the backwash phase ( root- mean- sqaure- error, {RMSE} down to 0.028 m, {R}2 up to 0.89), when compared against {L}i{DAR}. {H}owever, discrepancies have been found during the uprush phase ( {RMSE} up to 0.062 m, {R}2 down to 0.71), when the influence of the pole on the swash flow generates an overestimation of the water surface. {O}verall, owing to its simplicity of deployment, low cost and reasonable accuracy, the technique is considered suitable for swash studies.},
  keywords = {video swash pole ; image processing ; swash zone dynamics ; shore face ; {L}i{DAR} ; ultrasonic distance meter ; {CHILI}},
  booktitle = {},
  journal = {{R}emote {S}ensing},
  volume = {10},
  numero = {1},
  pages = {art. 49 [20 p.]},
  ISSN = {2072-4292},
  year = {2018},
  DOI = {10.3390/rs10010049},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072074},
}