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February 14, 2026Open Access

Land subsidence analysis using DInSAR and GNSS survey in Medan-Belawan City, North Sumatera, Indonesia

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Authors

ETEfendy TambunanJLJonson Lumban-GaolJSJosaphat Tetuko Sri Sumantyo

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Overview

This analysis quantifies land subsidence rates in Medan-Belawan, highlighting urgent monitoring needs due to high population density.

Key Points

  • The aim is to quantify land subsidence rates in Medan-Belawan and evaluate the consistency of two measurement methods.
  • Utilized GNSS observations at 10 benchmark points
  • Applied Differential Interferometric Synthetic Aperture Radar (DInSAR) analysis using Sentinel-1A imagery
  • Compared subsidence rates from GNSS and DInSAR methods
  • GNSS-derived subsidence rates ranged from -0.84 to -8.76 cm/year
  • DInSAR-derived rates ranged from -6.18 to -13.56 cm/year
  • Overall mean subsidence rate was -6.41 cm/year
  • High subsidence rates concentrated in densely populated districts

Cite This Study

Tambunan et al. (2026) studied this question.

synapsesocial.com/papers/699011712ccff479cfe5821chttps://doi.org/10.1051/bioconf/202622005009/pdf
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