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<p>Geomorphic factors play a vital role in deciphering the tectonic activity of a basin. Landslides, which are natural hazards, are also affected by these frequently occurring tectonic activities. Although landslide susceptibility plays a significant role in identifying potential landslide areas, the influence of tectonic activity remains largely unaccounted for. Thus, in this study, the active tectonic indices calculated from geomorphic factors, including the bifurcation ratio, circulatory ratio, elongation ratio, form factor, and hypsometric integral, were integrated with the landslide susceptibility map of the Barak Basin. An efficient machine learning method, landslide training and 12 landslide conditioning parameters were used to prepare a landslide susceptibility map of the Barak Basin. The results revealed that 13% of the area had very high landslide susceptibility, whereas 17% had medium susceptibility. Furthermore, upon basin-wise analysis, sub-basin 6 comprised a greater percentage of areas with very high and high susceptibility. The active tectonic classification for the sub-basin revealed high&#xa0;tectonic activity for sub-basins 4 and 6; moderate activity for sub-basins 2, 5 and 7; and low activity for sub-basins 1 and 3. Furthermore, when the LSM sub-basin was analyzed, greater tectonic activity was calculated in sub-basin 6, where more than 16% of the areas presented very high and high susceptibility. In contrast, for sub-basin 4, only 10% of the area is covered by highly susceptible areas, mainly because of the lower density of roads and documented landslides. Finally, our SHAP plot also revealed a close association with tectonics and landslides. Thus, the results provide greater insight for further integrating geomorphic parameters in LSM preparation, providing planners and policymakers with crucial information for effective land use.</p>

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Integration of active tectonic index and geomorphic parameters for landslides susceptibility mapping in the Barak River basin

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Adaphro Ashuli,
  • Ankit Singh,
  • Nitesh Dhiman,
  • K. C. Niraj,
  • Chandra Shekhar Dubey,
  • Shashank Shekhar,
  • Dericks Praise Shukla

摘要

Geomorphic factors play a vital role in deciphering the tectonic activity of a basin. Landslides, which are natural hazards, are also affected by these frequently occurring tectonic activities. Although landslide susceptibility plays a significant role in identifying potential landslide areas, the influence of tectonic activity remains largely unaccounted for. Thus, in this study, the active tectonic indices calculated from geomorphic factors, including the bifurcation ratio, circulatory ratio, elongation ratio, form factor, and hypsometric integral, were integrated with the landslide susceptibility map of the Barak Basin. An efficient machine learning method, landslide training and 12 landslide conditioning parameters were used to prepare a landslide susceptibility map of the Barak Basin. The results revealed that 13% of the area had very high landslide susceptibility, whereas 17% had medium susceptibility. Furthermore, upon basin-wise analysis, sub-basin 6 comprised a greater percentage of areas with very high and high susceptibility. The active tectonic classification for the sub-basin revealed high tectonic activity for sub-basins 4 and 6; moderate activity for sub-basins 2, 5 and 7; and low activity for sub-basins 1 and 3. Furthermore, when the LSM sub-basin was analyzed, greater tectonic activity was calculated in sub-basin 6, where more than 16% of the areas presented very high and high susceptibility. In contrast, for sub-basin 4, only 10% of the area is covered by highly susceptible areas, mainly because of the lower density of roads and documented landslides. Finally, our SHAP plot also revealed a close association with tectonics and landslides. Thus, the results provide greater insight for further integrating geomorphic parameters in LSM preparation, providing planners and policymakers with crucial information for effective land use.