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<p>Landslide is a pervasive and escalating geo-environmental hazard in Arunachal Himalaya. Fragile geology, active tectonics, intense rainfall and unsustainable anthropogenic activities aggravate landslide occurrences in Arunachal Pradesh. This study presents a comprehensive landslide inventory for Arunachal Pradesh for the year 2023 using pre- and post-monsoon multispectral satellite imagery, 10&#xa0;m Carto DEM and a semi-automatic deep learning model. A total of 3595 landslides were identified, varying widely in size and shape, with a notable concentration along the Siwalik belt and the weak zones comprising of Lohit thrust, Mishmi thrust &amp; Tidding-Suture Zone. Field verification of the selected 25 landslide polygons show a 100% match between the interpreted data and the ground truth. While heavy rainfall is the primary trigger, new road construction and other human interventions significantly amplify slope instability in Arunachal Pradesh. This detailed inventory, enriched with 18 attributes including dimensions, activity status and causal factors, provides critical insights into the complex interplay of natural and anthropogenic drivers of landslides in this tectonically active and climatically sensitive region, underscoring the urgent need for integrated disaster risk management strategies.</p>

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Landslide Inventory of Arunachal Pradesh using Space Technology

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Darshan Borgohain,
  • Saumitra Deb,
  • Harekrishna Dutta,
  • Kuntala Bhushan,
  • Nirmala Jain,
  • Tapas Ranjan Martha,
  • Iswar Chandra Das

摘要

Landslide is a pervasive and escalating geo-environmental hazard in Arunachal Himalaya. Fragile geology, active tectonics, intense rainfall and unsustainable anthropogenic activities aggravate landslide occurrences in Arunachal Pradesh. This study presents a comprehensive landslide inventory for Arunachal Pradesh for the year 2023 using pre- and post-monsoon multispectral satellite imagery, 10 m Carto DEM and a semi-automatic deep learning model. A total of 3595 landslides were identified, varying widely in size and shape, with a notable concentration along the Siwalik belt and the weak zones comprising of Lohit thrust, Mishmi thrust & Tidding-Suture Zone. Field verification of the selected 25 landslide polygons show a 100% match between the interpreted data and the ground truth. While heavy rainfall is the primary trigger, new road construction and other human interventions significantly amplify slope instability in Arunachal Pradesh. This detailed inventory, enriched with 18 attributes including dimensions, activity status and causal factors, provides critical insights into the complex interplay of natural and anthropogenic drivers of landslides in this tectonically active and climatically sensitive region, underscoring the urgent need for integrated disaster risk management strategies.