Evaluación de las líneas de regresión erosivas en las zonas costeras de la parroquia Chanduy, cantón Santa Elena mediante técnicas de sensores remotos (remote sensing)

Abstract

The objective of this study was to evaluate the erosive regression lines in the coastal areas of the Chanduy parish. For which the erosive rates were obtained, as well as the evolution of the coastline using remote sensing techniques (remote sensing) and determined the erosive factors that influence them. The evaluation of the erosive regression lines was carried out by analyzing the coastlines of different periods (2009, 2016 and 2021) with the implementation of the Digital Coastal Analysis System (DSAS) in the ArcGis desktop v10.4 Software. The study area was classified into four zones with different affections due to erosive processes where the lines of different times were analyzed, resulting in erosion rates and the advancement of the coastline in certain zones. It was determined that, of the two parameters analyzed from the different zones, zone 4 is the most affected, with an average erosion rate of 1.31 m/y and 12.75 m of advancement of the coastline towards the continent. It is concluded that the erosive processes that most affect coastal areas are the force of waves, tides and gravity, and various anthropogenic factors, affected mainly by the shrimp industry located in zone 4. The use of drones is recommended to obtain more accurate and current information to obtain a more detailed study of the terrain, which allows the possibility of forecasting events and possible risks.