Monitoring of changes from Chalous to Tonekabon Coastline Using Sentinel-1 Satellite Images

Authors

1 M.Sc Student, School of Surveying and Geospatial Engineering, University of Tehran

2 Associate Professor, School of Surveying and Geospatial Engineering, University of Tehran

10.30467/nivar.2021.146142

Abstract

The coastline is considered as the boundary between water and land. coasts are one of the most important environmental effects that directly affect human life. Rising sea levels due to global warming have made coastal cities among the areas under threat. Therefore, management and planning to prevent coastal erosion is one of the important issues that should be considered. In this research, we have studied the changes of shoreline using sentinel-1 satellite images in mazandaran province, the coast between the cities of chalous and tonekabon. For this purpose, two images on 15/01/2019 and 01/09/2021 have been used and the desired images have been taken from the google earth engine system. In the pre-processing step of the images, we corrected the height error of the study area and adjusted the speckle noise. The edge of the shore was discovered with the otsu threshold in the images. Finally, Digital Shoreline analysis system (DSAS) was used to calculate the amount of sedimentation and erosion of the coast by EPR technique. In 87% of the coast of this transects, we have witnessed coastal erosion. The average amount of erosion is about 7 meters per year.

Keywords


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Volume 45, 114-115 - Serial Number 114
September 2021
Pages 108-116
  • Receive Date: 09 December 2021
  • Revise Date: 29 December 2021
  • Accept Date: 20 January 2022
  • First Publish Date: 20 January 2022