Unit 6: Disaster management

1. Introduction to Disasters

1.1 Core Concepts

• Hazard: A dangerous phenomenon, substance, human activity, or condition that may cause loss of life, injury or other health impacts, property damage, loss of livelihoods and services, social and economic disruption, or environmental damage.
• Vulnerability: The characteristics and circumstances of a community, system, or asset that make it susceptible to the damaging effects of a hazard. It can be physical, social, economic, or environmental.
• Capacity: The combination of all the strengths, attributes, and resources available within a community, society, or organization that can be used to achieve agreed goals. Capacity is the opposite of vulnerability.
• Risk: The combination of the probability of a hazardous event and its negative consequences. Risk is often expressed by the equation:
  Risk = Hazard x Vulnerability / Capacity
• Disaster: A serious disruption of the functioning of a community or a society involving widespread human, material, economic, or environmental losses and impacts, which exceeds the ability of the affected community or society to cope using its own resources. A disaster happens when a hazard strikes a vulnerable population.

1.2 Classification of Disasters

1. Natural Disasters: Caused by natural processes of the Earth.

   • Geophysical: Earthquakes, Volcanic Eruptions, Landslides, Tsunamis.
   • Hydrological: Floods, Avalanches.
   • Climatological: Drought, Wildfires, Extreme Temperatures (Heat/Cold Waves).
   • Meteorological: Cyclones, Tornadoes, Storms.
   • Biological: Epidemics, Pandemics, Pest Infestations.

2. Man-made (Anthropogenic) Disasters: Caused by human action or inaction.

   • Technological: Industrial accidents (chemical spills, nuclear radiation), transport accidents, structural collapses.
   • Industrial: Chemical spills, gas leaks, oil spills, mine fires.
   • Warfare & Civil Strife: Wars, terrorism, internal conflicts.
   • Fires: Building fires, coal fires, forest fires (if human-caused).

2. Natural Disasters: Types, Effects, and Management

2.1 Floods

• Nature: An overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land.
• Types:
  • Fluvial (River) Floods: Occur when a river's flow exceeds its channel's capacity.
  • Pluvial (Surface) Floods: Caused by intense rainfall creating a flood event independent of an overflowing water body. Common in urban areas.
  • Coastal Floods: Result from storm surges (associated with cyclones), tsunamis, or high tides.
  • Flash Floods: Rapid flooding of low-lying areas, caused by intense rainfall or a sudden release of water (e.g., dam break).
• Effects:
  • Primary: Loss of life, damage to buildings and infrastructure (roads, bridges), erosion of soil.
  • Secondary: Contamination of water supply, leading to waterborne diseases (cholera, typhoid); disruption of services (electricity, communication); food shortages.
  • Tertiary: Economic losses (destruction of crops, tourism decline), psychological trauma, displacement of populations.
• Management:
  • Mitigation (Structural): Construction of dams, reservoirs, levees, embankments, channel improvement.
  • Mitigation (Non-structural): Floodplain zoning, watershed management (afforestation), wetland protection.
  • Preparedness: Early warning systems (e.g., Central Water Commission in India), evacuation planning, community drills.
  • Response: Search and rescue, providing safe drinking water, food, shelter, and medical aid.
  • Recovery: Rebuilding infrastructure, providing financial assistance, de-silting agricultural land.

2.2 Drought

• Nature: A prolonged period of abnormally low rainfall, leading to a shortage of water. It is a 'creeping' disaster whose onset is difficult to detect.
• Types:
  • Meteorological: Deficiency of precipitation from the norm.
  • Hydrological: Depletion of surface and sub-surface water resources (rivers, lakes, groundwater).
  • Agricultural: Inadequate soil moisture to support crop growth.
  • Socio-economic: The impact of the above on human life, leading to food shortages, famine, and migration.
• Effects: Crop failure, famine, malnutrition, livestock death, land degradation and desertification, water and food scarcity, migration, and conflicts over water resources.
• Management:
  • Mitigation: Water conservation techniques (rainwater harvesting, drip irrigation), afforestation, promoting drought-resistant crops.
  • Preparedness: Early warning and monitoring systems, contingency crop planning, creating a buffer stock of food grains.
  • Response: Provision of drinking water via tankers, cattle camps with fodder, food-for-work programs (e.g., MGNREGA in India).
  • Recovery: Financial assistance to farmers, promoting alternative livelihoods, long-term water security projects.

2.3 Cyclone

• Nature: A large-scale air mass that rotates around a strong center of low atmospheric pressure. Known as Hurricanes in the Atlantic, Typhoons in the Pacific, and Cyclones in the Indian Ocean.
• Effects:
  • High-speed Winds: Cause structural damage to buildings, uproot trees, and disrupt communication and power lines.
  • Storm Surge: Abnormal rise of sea level along the coast, causing massive flooding and inundation. This is the most destructive element.
  • Heavy Rainfall: Leads to widespread inland flooding.
• Management:
  • Mitigation: Construction of cyclone shelters, coastal belt plantation (mangroves), strengthening communication networks, hazard mapping.
  • Preparedness: Advanced early warning and tracking systems (e.g., Indian Meteorological Department - IMD), public awareness campaigns, evacuation plans.
  • Response: Timely evacuation of people from coastal areas, search and rescue operations, immediate relief supply.
  • Recovery: Restoration of power and communication, providing assistance for rebuilding houses, psychological support.

2.4 Earthquakes

• Nature: A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
• Effects: Ground shaking, surface rupture, landslides, liquefaction (soil behaving like a liquid), tsunamis (if the epicenter is undersea), collapse of structures, loss of life, fires from broken gas lines.
• Management:
  • Mitigation: Enforcing earthquake-resistant building codes (seismic zoning), retrofitting existing buildings, land-use planning to avoid construction on fault lines.
  • Preparedness: Public education on what to do during an earthquake (Drop, Cover, Hold On), creating family disaster kits, conducting mock drills.
  • Response: Search and rescue (specialized teams like NDRF), medical services for the injured, setting up temporary shelters.
  • Recovery: Debris clearance, reconstruction of buildings and infrastructure, long-term trauma counseling.

2.5 Landslides

• Nature: The movement of rock, debris, or earth down a sloped section of land. Triggered by heavy rainfall, earthquakes, deforestation, or improper construction on slopes.
• Effects: Destruction of property, burial of settlements, blocking of roads and rivers (can lead to flooding), loss of life.
• Management:
  • Mitigation: Slope stabilization techniques (retaining walls, terracing), proper drainage control, afforestation, land-use zoning to restrict construction in high-risk areas.
  • Preparedness: Hazard mapping to identify vulnerable zones, early warning systems based on rainfall intensity.
  • Response: Search and rescue, clearing debris from transport routes.
  • Recovery: Relocating populations from highly vulnerable areas, long-term geological monitoring.

2.6 Avalanches

• Nature: A rapid flow of snow down a slope, such as a mountain. Can be triggered by new snowfall, warming temperatures, or human activity.
• Effects: Burial and destruction of anything in its path (people, buildings, forests), loss of life due to asphyxiation, trauma, or hypothermia.
• Management:
  • Mitigation: Construction of structural defenses like snow fences and avalanche sheds, controlled explosions to trigger smaller, safer avalanches.
  • Preparedness: Hazard mapping, avalanche forecasting and warning systems, public awareness for tourists and mountaineers.
  • Response: Highly specialized search and rescue operations using trained dogs, probes, and transceivers.
  • Recovery: Body recovery, infrastructure repair.

2.7 Volcanic Eruptions

• Nature: The eruption of molten rock (magma), ash, and gases from a volcano.
• Effects:
  • Lava Flows: Destroys everything in their path.
  • Pyroclastic Flows: Super-heated, fast-moving clouds of ash, rock, and gas; extremely deadly.
  • Ash Fall: Can blanket large areas, collapsing roofs, contaminating water, and disrupting air travel.
  • Lahars (Mudflows): A mixture of volcanic debris and water that flows down from a volcano, often at high speed.
  • Gases: Release of toxic gases like sulfur dioxide can cause respiratory problems and acid rain.
• Management:
  • Mitigation: Land-use planning to avoid development near active volcanoes.
  • Preparedness: Monitoring volcanic activity (seismic sensors, gas emissions), developing evacuation plans and warning systems.
  • Response: Evacuation, search and rescue, providing respiratory protection (masks).
  • Recovery: Cleaning up ash, long-term soil and water quality monitoring.

2.8 Heat and Cold Waves

• Nature:
  • Heat Wave: A period of abnormally and uncomfortably hot and usually humid weather.
  • Cold Wave: A rapid fall in temperature within a 24-hour period, requiring substantially increased protection for agriculture, industry, commerce, and social activities.
• Effects:
  • Health: Dehydration, heatstroke, hypothermia, frostbite. The elderly, children, and people with pre-existing conditions are most vulnerable.
  • Economic: Crop damage, increased energy consumption (for cooling/heating), stress on livestock.
• Management:
  • Mitigation: Urban planning to reduce the "urban heat island" effect (green spaces, cool roofs), improving building insulation.
  • Preparedness: Early warning systems, public awareness campaigns (advising people to stay hydrated/warm, avoid exertion).
  • Response: Opening public cooling/heating centers, ensuring water and power supply, providing medical assistance.
  • Recovery: Assessing agricultural losses, providing aid.

3. Man-made Disasters

3.1 Nuclear Disasters

• Nature: An event involving a significant release of radioactivity that can cause widespread harm to human health and the environment. Examples: Chernobyl (1986), Fukushima (2011).
• Causes: Accidents at nuclear power plants, improper disposal of nuclear waste, accidents during transport of nuclear materials, use of nuclear weapons.
• Effects: Immediate deaths from blast/exposure; long-term deaths from radiation-induced cancers; genetic mutations; contamination of land, air, and water for decades; widespread psychological trauma.
• Management:
  • Prevention: Strict safety protocols at nuclear facilities, fail-safe reactor designs, robust security.
  • Preparedness: On-site and off-site emergency plans, stockpiling of potassium iodide tablets (to protect the thyroid gland), public alert systems.
  • Response: Evacuation from the contaminated zone, decontamination of people and areas, providing specialized medical care.
  • Recovery: Long-term environmental monitoring, health screening of the affected population, decommissioning of the damaged facility.

3.2 Chemical Disasters

• Nature: The uncontrolled release of one or more hazardous chemicals into the environment. Example: Bhopal Gas Tragedy (1984).
• Causes: Industrial accidents, improper storage or handling of chemicals, transport accidents.
• Effects: Toxic gas clouds causing immediate death or respiratory damage; contamination of soil and water; long-term health effects (cancer, birth defects); fires and explosions.
• Management:
  • Prevention: Stringent industrial safety regulations, proper site selection for chemical plants (away from populated areas).
  • Preparedness: On-site and off-site emergency plans, training of first responders, community awareness about what to do in case of a leak (e.g., stay indoors, seal windows).
  • Response: Evacuation, providing specific medical antidotes, containing the spill/leak, chemical neutralization.

3.3 Biological Disasters

• Nature: The devastating effects caused by a massive outbreak of a disease. Can be natural (epidemics/pandemics like COVID-19) or deliberate (bioterrorism).
• Causes: Zoonotic spillover (from animals to humans), accidental release from a lab, intentional release of pathogens (e.g., Anthrax).
• Effects: Widespread illness and death, overwhelming of healthcare systems, severe economic disruption, social and psychological distress.
• Management:
  • Prevention: Vaccination programs, public health and sanitation measures, strict biosafety protocols in labs.
  • Preparedness: Disease surveillance systems, stockpiling of medical supplies (vaccines, antivirals, PPE), pandemic preparedness plans.
  • Response: Quarantine and isolation measures, contact tracing, rapid deployment of medical resources, public health communication.
  • Recovery: Economic recovery packages, mental health support, strengthening public health infrastructure.

3.4 Fire Disasters

• Building Fire:
  • Causes: Electrical short-circuits, cooking accidents, arson, improper storage of flammable materials.
  • Management: Fire-resistant building codes, installation of smoke alarms and sprinklers, clear evacuation routes, fire safety drills, rapid response by fire services.
• Coal Fire:
  • Causes: Spontaneous combustion in coal mines or storage piles, human negligence.
  • Effects: Can burn for decades underground, releasing toxic gases (CO, SO2), causing ground subsidence, and polluting air and water.
  • Management: Extremely difficult to extinguish. Methods include sealing off oxygen, cooling with water/nitrogen, and excavation of burning material.
• Forest Fire (Wildfire):
  • Causes: Natural (lightning) or human-caused (arson, unattended campfires, discarded cigarettes). Climate change increases risk.
  • Effects: Destruction of flora and fauna, air pollution, soil erosion, damage to property.
  • Management: Creating firebreaks, controlled burning, early detection through watchtowers and satellite imagery, aerial water bombing.
• Oil Fire:
  • Causes: Accidents at oil wells, refineries, pipelines, or during transportation (tankers).
  • Effects: Intense heat, release of thick toxic smoke, massive air and water pollution if oil spills.
  • Management: Specialized firefighting techniques using foam and chemical agents, containing oil spills using booms, controlled burning of the spill.

3.5 Transport Accidents

• Road/Rail/Air/Sea Accidents:
  • Causes: Human error (driver fatigue, negligence), mechanical failure, poor infrastructure (bad roads, outdated signals), adverse weather, violation of safety regulations.
  • Effects: Loss of life and injury, property damage, economic disruption, environmental pollution (in case of oil/chemical spills from ships/trains).
  • Management:
    • Prevention: Stricter safety regulations and enforcement, improved infrastructure design, regular vehicle/vessel/aircraft maintenance, driver/pilot training.
    • Preparedness: Emergency response teams stationed at strategic locations (e.g., along highways, at airports), well-defined emergency protocols.
    • Response: Rapid deployment of emergency medical services, police, and fire brigades; extrication of victims; traffic management; investigation.

4. Concept and Framework of Disaster Management

4.1 Concept of Disaster Management

Disaster Management can be defined as the organization and management of resources and responsibilities for dealing with all humanitarian aspects of emergencies, in particular preparedness, response, and recovery in order to lessen the impact of disasters.

The Disaster Management Cycle

It is a continuous process involving four key phases:

1. Mitigation: Long-term measures taken to minimize the risk and reduce the adverse impacts of a hazard.
   • Examples: Building codes, land-use planning, public education.
2. Preparedness: Planning how to respond when a disaster strikes.
   • Examples: Early warning systems, evacuation plans, stockpiling supplies, emergency drills.
3. Response: Actions taken immediately before, during, and after a disaster to save lives, minimize damage, and provide immediate assistance.
   • Examples: Search and rescue, medical assistance, providing food and shelter.
4. Recovery: Actions taken after a disaster to restore normal conditions and rebuild the community.
   • Short-term: Restoring essential services (power, water).
   • Long-term: Rebuilding homes and infrastructure, economic rehabilitation, psychosocial support. This phase includes Reconstruction and Rehabilitation.

4.2 National Disaster Management Framework (India)

The primary framework is guided by the Disaster Management Act, 2005. This act marked a paradigm shift from a relief-centric approach to a proactive, holistic approach focusing on preparedness and mitigation.

Institutional Structure

• National Disaster Management Authority (NDMA): The apex body, chaired by the Prime Minister of India. Responsible for laying down policies, plans, and guidelines for disaster management.
• National Executive Committee (NEC): Chaired by the Union Home Secretary. Assists the NDMA in the performance of its functions and is responsible for implementing the policies and plans.
• National Institute of Disaster Management (NIDM): Responsible for human resource development, capacity building, training, research, and documentation in the field of disaster management.
• National Disaster Response Force (NDRF): A specialized force for responding to disasters. Comprises battalions from various central armed police forces.

4.3 Administrative Levels for Disaster Response

The DM Act, 2005 mandates a three-tiered structure:

• Central Level: NDMA, NEC, NIDM, NDRF. The Ministry of Home Affairs is the nodal ministry for disaster management.
• State Level:
  • State Disaster Management Authority (SDMA): Chaired by the Chief Minister of the respective state. Lays down state-level policies and plans.
  • State Executive Committee (SEC): Headed by the Chief Secretary of the state, responsible for coordinating and monitoring the implementation of the national and state plans.
• District Level:
  • District Disaster Management Authority (DDMA): Co-chaired by the District Collector/Magistrate and the elected representative of the local authority. Acts as the planning, coordinating, and implementing body for disaster management at the district level. The District Collector is the key functionary.
• Local Level: Includes Panchayati Raj Institutions (PRIs), Urban Local Bodies (ULBs), and community-based organizations. They play a crucial role in last-mile implementation, awareness, and response.

4.4 Financial Arrangements

• National Disaster Response Fund (NDRF): A fund managed by the Central Government for meeting the expenses for emergency response, relief, and rehabilitation. It is constituted under the DM Act, 2005.
• State Disaster Response Fund (SDRF): Placed at the disposal of each State Government. The Centre contributes 75% for general category states and 90% for special category states. The first charge for disaster response is on the SDRF. If SDRF funds are exhausted, a state may request assistance from the NDRF.
• Prime Minister's National Relief Fund (PMNRF): A public fund used to provide immediate relief to families of those killed in disasters and to victims of major accidents.

5. Strategies and Role of Stakeholders

5.1 International Strategy for Disaster Reduction

• Yokohama Strategy (1994): First major global conference on natural disasters. Called for a shift towards pre-disaster mitigation and preparedness.
• Hyogo Framework for Action (HFA) 2005-2015: A comprehensive, action-oriented response to international concern about the growing impact of disasters. Focused on building the resilience of nations and communities to disasters.
• Sendai Framework for Disaster Risk Reduction (SFDRR) 2015-2030: The successor to the HFA. It is the current global blueprint for disaster risk reduction.
  • Goal: To prevent new and reduce existing disaster risk through the implementation of integrated measures.
  • Four Priorities for Action:
    1. Understanding disaster risk.
    2. Strengthening disaster risk governance to manage disaster risk.
    3. Investing in disaster risk reduction for resilience.
    4. Enhancing disaster preparedness for effective response and to "Build Back Better" in recovery, rehabilitation, and reconstruction.

5.2 National Strategy for Disaster Reduction (India)

• National Policy on Disaster Management (NPDM), 2009: Aims to build a safe and disaster-resilient India by developing a holistic, pro-active, multi-disaster oriented, and technology-driven strategy.
• National Disaster Management Plan (NDMP), 2016 (updated 2019): The first-ever national plan prepared in the country. It is designed to be aligned with the Sendai Framework. It provides a framework for all government agencies and stakeholders for prevention, mitigation, response, and recovery.

5.3 Role of Various Agencies and Stakeholders

• Non-Governmental Organizations (NGOs):
  • Crucial for last-mile connectivity and reaching the most vulnerable.
  • Roles include community-based preparedness, training, relief distribution, advocacy, and acting as a bridge between the community and the government.
• Community-Based Organizations (CBOs) & Community Participation:
  • The community is the first responder in any disaster.
  • Their participation is vital for sustainable disaster risk reduction. Roles include preparing village disaster management plans, search and rescue, running relief camps, and sharing traditional knowledge.
• Media:
  • Pre-disaster: Spreading awareness, disseminating warnings.
  • During disaster: Providing real-time information to the public and authorities.
  • Post-disaster: Highlighting gaps in response and recovery, ensuring transparency and accountability.
• Armed Forces (Army, Navy, Air Force):
  • Play a critical role in immediate response due to their training, discipline, and resources.
  • Roles include search and rescue, airlifting stranded people, establishing communication links, providing medical aid, and transporting relief supplies.
• Police and Civil Defence:
  • Police are often the first government agency to respond. Roles include maintaining law and order, securing affected areas, assisting in evacuation, and managing traffic.
  • Civil Defence volunteers support the administration in rescue, first aid, and relief distribution.
• Other Organizations:
  • Scientific & Technical Institutions: (IMD, GSI, CWC, ISRO) provide crucial data for forecasting, monitoring, and early warning.
  • Corporate Sector: Can contribute through Corporate Social Responsibility (CSR) funds, providing logistical support, and helping in reconstruction.
  • Academia: Contributes through research, developing new technologies, and disaster management education.