Question
Explain the risk reduction measures associated with landslides in India.
Answer :
Word Count : 1030
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Skip in 10
Landslides are one of the most frequent and destructive natural hazards in India, particularly in the Himalayan region, the Western Ghats, the Northeastern states, and parts of the Nilgiris and Eastern Ghats. They are triggered by a combination of natural factors such as intense rainfall, earthquakes, weathering, and slope instability, as well as anthropogenic activities like deforestation, unplanned construction, mining, and road cutting. Risk reduction measures associated with landslides in India therefore require a comprehensive approach that integrates scientific assessment, structural and non-structural strategies, environmental management, policy regulation, and community participation. One of the primary risk reduction measures is landslide hazard zonation mapping. The Geological Survey of India (GSI) and other institutions prepare detailed landslide hazard zonation (LHZ) maps that classify areas into different risk categories based on slope angle, geology, soil type, rainfall intensity, land use, and seismicity. These maps help planners and administrators identify vulnerable zones and regulate construction and developmental activities accordingly. By integrating remote sensing, GIS technology, and field surveys, hazard mapping provides a scientific basis for land-use planning and infrastructure development. Land-use planning and regulation are essential non-structural measures. Uncontrolled urbanization and construction on unstable slopes significantly increase landslide risk. Implementing strict building codes, restricting construction in high-risk zones, and regulating hill cutting and excavation activities can reduce vulnerability. In many hill towns, slope modification for roads and buildings disturbs the natural stability of terrain. Therefore, environmental impact assessments (EIA) and geotechnical investigations must be mandatory before undertaking major construction projects in landslide-prone areas. Proper zoning regulations and enforcement mechanisms are critical to prevent hazardous encroachments. Afforestation and vegetation management play a vital role in slope stabilization. Vegetation cover helps bind soil particles through root systems, enhances infiltration, and reduces surface runoff. Deforestation
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