Evolución y Análisis de la línea de costa, y Caracterización geomorfológica de Ancón y Anconcito mediante fotogrametría con drones
Fecha
2023
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
Ancón y Anconcito posee una extensa línea de costa donde predominan los acantilados y deslizamientos. El presente trabajo de investigación propone mediante la fotogrametría con drones obtener imágenes orto rectificadas del presente año para crear líneas de costa usando líneas costeras del 2012 y 2019 para poder determinar las tasas de erosión y retroceso ocurrido durante los últimos once años, con la ayuda del DSAS. El criterio que se usó para determinar las líneas de costa fue el pie de talud de los acantilados en cada uno de los años mencionados anteriormente, las cuales se dividieron en tres zonas; norte, centro y sur.
Los resultados obtenidos de las tasas de erosión indican que la zona centro y sur, es mucho más inestable debido a la fuerza del oleaje que golpea directamente el pie de los acantilados, así como su calidad de macizo, que fue determinada como clase III – media mediante estudios geomecanicos.
Cabe destacar que Anconcito, se encuentra un poco más estable por la presencia de la plataforma de abrasión que tiene una gran extensión, sin embargo, los principales agentes erosivos que afectan esta área, es la energía de las olas, así como la fuerte actividad antrópica que se da en el sector.
Ancon and Anconcito have an extensive coastline where cliffs and landslides predominate. The present research work proposes, through drone photogrammetry, to obtain orthorectified images of this year to create coastlines, using coastlines from 2012 and 2019 to determine the rates of erosion and retreat that have occurred during the last eleven years, with the help of the DSAS. The criteria used to determine the coastline was the base of the slope of the cliffs in each of the years mentioned above, which were divided into three zones: north, center and south. The results obtained from the erosion rates indicate that the central and southern zone is much more unstable due to the force of the waves that directly hit the base of the cliffs, as well as its quality, which was determined as class III – medium, through geomechanical studies. It should be noted that Anconcito is a little more stable due to the presence of the abrasion platform that has a large extension, however, the main erosive agents that affect this area are the energy of the waves, as well as the strong anthropic activity that occurs in the sector.
Ancon and Anconcito have an extensive coastline where cliffs and landslides predominate. The present research work proposes, through drone photogrammetry, to obtain orthorectified images of this year to create coastlines, using coastlines from 2012 and 2019 to determine the rates of erosion and retreat that have occurred during the last eleven years, with the help of the DSAS. The criteria used to determine the coastline was the base of the slope of the cliffs in each of the years mentioned above, which were divided into three zones: north, center and south. The results obtained from the erosion rates indicate that the central and southern zone is much more unstable due to the force of the waves that directly hit the base of the cliffs, as well as its quality, which was determined as class III – medium, through geomechanical studies. It should be noted that Anconcito is a little more stable due to the presence of the abrasion platform that has a large extension, however, the main erosive agents that affect this area are the energy of the waves, as well as the strong anthropic activity that occurs in the sector.
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Palabras clave
Fotogrametría, DSAS, Erosión, Aacreción, Dron.