JNTU B.Tech III DISASTER MANAGEMENT Previous Question Paper (September - 2021 - R16)

The landscape of disasters is evolving rapidly due to the intersection of environmental, technological, and socio-economic changes. Emerging dimensions include:

• Climate Change: Increasing frequency and intensity of extreme weather events such as heatwaves, cyclones, and floods, which exacerbate existing vulnerabilities.
• Urbanization and Population Density: Rapid, often unplanned, urban growth leads to high concentrations of people and assets in hazard-prone areas, increasing the potential for mass casualties and economic loss.
• Technological and Industrial Risks: The complexity of modern infrastructure and reliance on critical systems (power grids, digital networks) creates cascading failure risks where a localized disaster triggers widespread systemic collapse.
• Biological and Health Emergencies: The global interconnectedness of trade and travel has increased the speed at which pandemics and health crises can spread, posing a significant modern disaster dimension.
• Environmental Degradation: The loss of natural buffers like mangroves and wetlands reduces the earth's natural capacity to mitigate hazards, turning minor events into major disasters.

The concept of risk levels in disaster management is defined by the relationship between hazard, vulnerability, and exposure, expressed as:

Risk levels are categorized to prioritize mitigation and preparedness:

• Low Risk: Hazards are infrequent or weak, and the community possesses high resilience and robust infrastructure to absorb the impact.
• Moderate Risk: Hazards are present and potential impacts are significant, but existing coping mechanisms are sufficient to prevent catastrophic loss.
• High Risk: Frequent or intense hazards coupled with high vulnerability (e.g., poor infrastructure, poverty) where the community's capacity is insufficient to manage the impact without external intervention.
• Extreme/Catastrophic Risk: Situations where the hazard magnitude exceeds all local coping capacities, leading to total systemic failure and requiring large-scale national or international disaster response.