Abstract
Landslide hazard zonation (LHZ) map is an important tool for designers, field engineers, and geologists, to classify the land surface into zones of varying degree of hazards based on the estimated significance of causative factors, which influence the stability. The landslide hazard zonation map is a rapid technique of hazard assessment of the land surface. LHZ is useful in several purposes; such as the LHZ maps help the planners and field engineers to identify the hazard prone areas and therefore, enable one to choose favorable locations for site development schemes. In case the site cannot be changed and it is hazardous, the zonation before construction helps to adopt proper precautionary measures to tackle the hazard problems. Anbalgan develops the technique of landslide hazard zonation. Many researchers have developed various methods of landslide zonation but they are not based on causative factors. The main merit of Anbalagan's method is that it considers causative factors in a simple way. The six major causative factors are: (1) lithology-to consider the rock and land type, (2) structure-relationship of structural discontinuities with slopes, (3) slope morphometry, (4) relative relief-height of slope, (5) land use and land cover, and (6) ground water condition.
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