A feasibility study was conducted to ascertain the scope of the landslide hazard evaluation factor using the Bureau of Indian Standards (LHEF—also a BIS code) and the Analytical Hierarchy Process (AHP) approach for landslide susceptibility zonation (LSZ). LHEF guidelines recorded in the BIS code have been slightly modified considering the scale of the study. Multi-source geospatial data has been used to extract landslide causative factors in addition to the slope facet. A total of 153 slope facets have been identified for the study area Moa-Maran region of Manipur. For each slope facet, an estimate of landslide propensity has been made using ratings derived from the LHEF scheme and the AHP method. The prediction rate curve and Receiver operating characteristic (ROC) have been evolved for LHEF and AHP methods and further used for establishing feasibility. The prediction rate curve estimated 70.9 and 72.63% accuracy for the LHEF/BIS method and the AHP method respectively, whereas ROC curve estimate was found to be 77.2% for LHEF/BIS and 79.4% for the AHP method. This study has found both methods reasonably feasible and can be used in similar terrain conditions found in other regions.

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Estimating Terrain Feasibility Using BIS Code and AHP Methods for Landslide Susceptibility Zonation: A Case Study of Mao-Maram Region Manipur

  • Kaikho Khusulio,
  • Rohan Kumar,
  • Swati Sharma

摘要

A feasibility study was conducted to ascertain the scope of the landslide hazard evaluation factor using the Bureau of Indian Standards (LHEF—also a BIS code) and the Analytical Hierarchy Process (AHP) approach for landslide susceptibility zonation (LSZ). LHEF guidelines recorded in the BIS code have been slightly modified considering the scale of the study. Multi-source geospatial data has been used to extract landslide causative factors in addition to the slope facet. A total of 153 slope facets have been identified for the study area Moa-Maran region of Manipur. For each slope facet, an estimate of landslide propensity has been made using ratings derived from the LHEF scheme and the AHP method. The prediction rate curve and Receiver operating characteristic (ROC) have been evolved for LHEF and AHP methods and further used for establishing feasibility. The prediction rate curve estimated 70.9 and 72.63% accuracy for the LHEF/BIS method and the AHP method respectively, whereas ROC curve estimate was found to be 77.2% for LHEF/BIS and 79.4% for the AHP method. This study has found both methods reasonably feasible and can be used in similar terrain conditions found in other regions.