@article{fdi:010063186, title = {{V}ideo monitoring and field measurements of a rapidly evolving coastal system : the river mouth and sand spit of the {M}ataquito {R}iver in {C}hile}, author = {{C}ienfuegos, {R}. and {V}illagran, {M}. and {A}guilera, {J}. {C}. and {C}atalan, {P}. and {C}astelle, {B}. and {A}lmar, {R}afa{\¨e}l}, editor = {}, language = {{ENG}}, abstract = {{T}he understanding of morphological processes controlling the evolution of sand spit reformation after a tsunami impact is a challenging and interesting topic, especially in highly energetic and micro tidal environments. {A} field campaign performed during {D}ecember 2012 at the {M}ataquito {R}iver mouth in {C}hile, allowed us to simultaneously monitor topobathymetry evolution, wave climate, tidal range, swash zone dynamics and upper beach face evolution over a portion of its sand spit. {A} video system was set up for a continuous and long-term monitoring of the evolution of the river mouth and sand spit. {P}rimarily, in this work we focus on the application of a video-derived shoreline detection method to assess shoreline evolution and beach cusps migration at hourly scales. {W}e test the method performance on short-term episodic migration of beach cusps recorded during the campaign. {B}each face variations at a daily scale were observed, which can be attributed to the migration of beach cusps in the alongshore direction, and linked to wave forcing and alongshore sediment transport.}, keywords = {{C}oastal monitoring ; video system ; river mouth ; sand spit ; beach cusps ; migration ; {CHILI}}, booktitle = {}, journal = {{J}ournal of {C}oastal {R}esearch}, numero = {no sp{\'e}cial 70}, pages = {639--644}, ISSN = {0749-0208}, year = {2014}, DOI = {10.2112/si70-108.1}, URL = {https://www.documentation.ird.fr/hor/fdi:010063186}, }