Describe the various causes and the effects of landslides. Mention the important components of the National Landslide Risk Management Strategy.
Introduction
A landslide is the mass movement of rock, debris, or earth down a slope, primarily driven by gravity. It is a significant geohazard, particularly in mountainous regions.
Causes of Landslides
Natural Factors
Heavy rainfall saturates soil, increasing pore water pressure. Earthquakes, volcanic activity, weak geological structures, steep slopes, and erosion by rivers also trigger them.
Anthropogenic Factors
Deforestation removes soil-binding roots. Unscientific construction, mining, and excavation destabilize slopes by altering contours and removing support. Improper land use exacerbates risks.
Effects of Landslides
Landslides cause loss of life and property, damaging critical infrastructure like roads and railways, disrupting connectivity. Environmental impacts include river blockages, flash floods, habitat destruction, and soil erosion. Economically, agricultural land is lost, and trade routes are affected. Communities face displacement and trauma.
National Landslide Risk Management Strategy
India's NLRMS adopts a holistic approach with key components:
- Hazard Mapping and Zonation: Identifying and classifying landslide-prone areas.
- Monitoring and Early Warning Systems: Deploying sensors for real-time data and alerts.
- Capacity Building: Training communities, responders, and engineers.
- Public Awareness and Education: Informing residents about risks and safety.
- Mitigation Measures: Structural (e.g., retaining walls, drainage) and non-structural (e.g., land-use planning, afforestation).
- Policy and Regulatory Framework: Enforcing building codes and land-use rules.
Conclusion
Effective landslide management requires a multi-pronged strategy combining scientific understanding, robust infrastructure, community participation, and strong governance for resilient communities.
209 words · target ~250
The directive 'describe' requires a detailed account of the causes and effects of landslides, along with an outline of the key components of the National Landslide Risk Management Strategy.
Suggested structure
Introduction: Definition of Landslides
Various Causes of Landslides (Natural and Anthropogenic)
Effects of Landslides (Environmental, Economic, Social)
Important Components of the National Landslide Risk Management Strategy
Conclusion/Way Forward
Key points
Causes: Include natural factors (heavy rainfall, earthquakes, volcanic activity, geological structure, erosion) and anthropogenic factors (deforestation, construction, mining, improper land use).
Effects: Cover loss of life and property, damage to infrastructure (roads, railways, buildings), environmental degradation (river blockage, habitat loss), economic disruption, and displacement.
National Landslide Risk Management Strategy components: Focus on hazard mapping and zonation, monitoring and early warning systems, capacity building, public awareness and education, mitigation measures (structural and non-structural), and policy/regulatory framework.
Emphasize the multi-faceted nature of both causes and effects.
Highlight the proactive and reactive elements of the national strategy.
Provide specific examples where relevant (e.g., types of mitigation measures).
Common mistakes
Confusing causes with effects or vice-versa.
Omitting specific components of the National Landslide Risk Management Strategy, providing only generic disaster management points.
Lack of depth in describing either causes or effects, or both.
Not structuring the answer clearly according to the question's demands.
Difficulty: Medium — The question requires comprehensive knowledge of both the scientific aspects of landslides (causes and effects) and specific policy details (National Landslide Risk Management Strategy components). Recalling the exact components of the national strategy can be challenging for many candidates.