DETERMINING SEASONAL SEAFLOOR DEPTH CHANGES AROUND OFFSHORE ISLANDS OF VIETNAM USING SENTINEL-2 AND GOOGLE EARTH ENGINE

  • Nhu Hung Nguyen Institute of Techniques for Special Engineering, Le Quy Don Technical University
  • Van Phu Le Institute of Techniques for Special Engineering, Le Quy Don Technical University
  • Van Son Nguyen Faculty of Radio-Electronic Engineering, Le Quy Don Technical University
Keywords: Bathymetry, remote sensing, Sentinel-2, Google Earth Engine, offshore islands, climate change

Abstract

This study focuses on determining bathymetric changes around offshore islands of Vietnam using remote sensing data available on the Google Earth Engine cloud platform. Sentinel-2 multispectral satellite imagery was collected over three time periods, January 14, 2020, June 5, 2020 and June 15, 2021, coinciding with the wind season to analyze and calculate bathymetric changes. The results of the bathymetry compared to the field measurement points have coefficients of determination (R2) ranging from 0.83 to 0.94. The Relative Mean Square Error (RMSE) results obtained were 0.066 m, 0.048 m and 0.079 m, initially providing a map of seasonal bathymetry changes consistent with reality. This method demonstrates the efficiency and automation potential for tracking depth changes in the Vietnamese coastal region, especially around offshore islands. Moreover, it highlights the importance of continuous monitoring for environmental protection, navigation, and resource management.

điểm /   đánh giá
Published
2025-01-14
Issue
Vol. 7 No. 02 (2024)
Section
Bài viết