Disaster Risk Reduction (DRR) – Comprehensive Exam Notes

Disaster Risk Reduction (DRR)

• Conceptual framework that seeks to minimise vulnerabilities and disaster-related losses across society while pursuing sustainable development.
• Operates through three strategies:
– Prevention (avoidance of hazard impact)
– Mitigation (limiting severity/impact)
– Preparedness (readiness & capacity to respond)
• Applies to “all hazards–all stakeholders–all phases” approach.

Disaster Management Cycle & Phases

• Continuous loop of activities before, during and after a disaster.
• Three key stages (each with multiple sub-phases):

1. PRE-DISASTER
   ▫ Risk assessment (hazard & vulnerability mapping)
   ▫ Mitigation / Prevention
   ▫ Preparedness (planning, drills, early warning)

2. DISASTER RESPONSE (emergency phase)
   ▫ Warning / Evacuation
   ▫ Search & Rescue, life-saving, first aid
   ▫ Immediate assistance (food, water, shelter, security)
   ▫ Damage & needs assessment

3. POST-DISASTER
   ▫ Ongoing relief / assistance
   ▫ Restoration of critical services & infrastructure
   ▫ Reconstruction & resettlement / relocation
   ▫ Economic & social recovery; integration with development
   • Cycle reminds that “ongoing development activities” feed into each phase.

Prevention

• Definition – activities that completely avoid the adverse impact of hazards.
• Typical examples: prohibiting construction on fault lines, landslide-prone slopes, flood plains; enforcing land-use zoning.

Mitigation

• Aim – reduce risk, impact or effects of a potential/impending disaster.
• Learning ethos – “build back better”, integrate lessons from past events.
• Structural measures:
– Multi-hazard-resistant buildings, shelters
– Retrofitting & strengthening of weak structures
– Modernised early-warning hardware
• Non-structural measures:
– Awareness generation, education, mock drills
– Training & capacity-building
– Policy, by-laws, building codes, village/district plans
– Effective warning dissemination

Preparedness

• State of readiness for a threatening event & its effects.
• Ensures effective response through: SOPs, emergency stockpiles, evacuation plans, community participation.
• Mitigation vs Preparedness quick view:
– Mitigation = long-term, may occur pre- or post-disaster (e.g. embankment construction)
– Preparedness = short-term, routine, immediately before hazard (e.g. checking embankment condition)

Relief / Response (Emergency Phase)

• “Act of helping or alleviating” immediate suffering.
• Minimum standards (as per NDMA Sec-12):
– Shelter, food, safe water, medical cover, sanitation
– Special provisions for widows, orphans
– Ex-gratia for life loss, house damage, livelihood restoration

Recovery & Reconstruction

• Final post-disaster step: rebuilding livelihoods, infrastructure, retrofitting damaged assets, restoring economy & social fabric.

Risk Analysis & Assessment

• Risk = probability of harmful consequences/losses arising from interaction of hazard & vulnerability.
• Mathematical views:
– Core concept: $\text{Risk}=\dfrac{\text{Hazard}\times\text{Vulnerability}}{\text{Capacity}}$
– Disaster Risk Index: $R=(H+V+E)-C$ where
• $H$ = Hazard index; $V$ = Vulnerability; $E$ = Exposure; $C$ = Capacity/measure index.
• Level of risk depends on: nature of hazard, vulnerability of exposed elements, their economic value.
• Elements at risk = people, buildings, crops, critical facilities, etc.

Early Warning Systems (EWS)

• Definition – set of capacities to generate & disseminate timely, meaningful warnings enabling preparedness & action.
• Four integrated elements:

1. Risk knowledge (hazard & vulnerability data)

2. Monitoring & prediction (sensors, modelling)

3. Dissemination & communication (multi-channel, redundant, understandable messages)

4. Response capability (coordination, governance, public awareness)
   • Policy relevance: protects lives & national assets; cost-effective by avoiding huge rehabilitation expenses.
   • Communication needs: robust hardware + strong inter-actor relationships; redundancy, emergency power back-ups.
   • Key success factors: threat understanding, priority setting, institutional networks, legal authority, financing.

Post-Disaster Environmental Response

• Objective – minimise secondary hazards & protect public health.
• Domains & key actions:

1. Water
   ▫ Use only bottled/boiled/treated water; avoid sources with chemical/fuel contamination.
   ▫ Emergency sources: water-heater tank, melted ice, canned-food liquids.

2. Sanitation & Hygiene
   ▫ Hand-washing with safe water or \ge60% alcohol sanitiser; temporary hand-wash stations.
   ▫ Bathing, dental care, wound hygiene using clean water; avoid contact with flood water if wounded.

3. Food Safety
   ▫ “When in doubt, throw it out.” Discard perishables after 4-hr power loss; discard containers with screw caps, cardboard, bulging cans.
   ▫ Recondition sealed cans via washing + bleach solution or boiling 2 min.
   ▫ Infant feeding: prefer ready-to-feed formula; otherwise use bottled/boiled water.

4. Waste Management
   ▫ Disasters generate soil, rubble, vegetation, hazardous materials, etc. Needs plan for collection, reuse, recycle, landfilling.
   ▫ Building codes at mitigation stage can reduce future debris; recovery stage must establish debris-management plan.

5. Disease Control
   ▫ Four main categories: water/food-borne, respiratory (crowding), vector-borne, wound infections.
   ▫ Strategies: site planning, water & sanitation, safe food, vector control (nets, spraying), vaccination (measles, Td), clinical services, lab support.

6. Security (Human Security lens)
   ▫ Protect populations from fear (aftershocks, lawlessness) & want (essentials). Coordination across UN, NGOs, military (in supportive role).

7. Communications
   ▫ Efficient two-way information flow essential; systems must be redundant; managers need protocols for receiving, evaluating & disseminating data.

Roles & Responsibilities

• Government of India
– National Committee on DM chaired by PM.
– NDMA (policy, guidelines), NEC (14 secretaries), NIDM, NDRF (specialist response force).
– Central Government supplements state efforts with funds & logistics.
• State level: SDMA (Chief Minister), SEC; creation of SDRF.
• District: DDMA (District Magistrate) – direct interface with communities.
• Other institutions: Armed Forces, CPMFs, Police & Fire, Civil Defence, Home Guards, NCC, NSS, NYKS.
• Community – first responders; tasks in preparedness, response, recovery, prevention (mock drills, kitchens, counselling, rebuilding, etc.).
• Stakeholders:
– Corporate Social Responsibility (CSR)
– Public-Private Partnership (PPP)
– Media partnerships
– Education & training of communities, school curricula.

Policies & Legislation for DRR

• Objectives: save lives/property, mainstream DRR into development, mobilise resources.
• International guidance: Hyogo Framework (2005-2015); Sendai Framework (2015-2030).
• IFRC-UNDP Checklist & Handbook on Law & DRR – templates for “good legislation” (community focus, risk reduction duties, accountability mechanisms, financing).

DRR Programmes in India

• Oxfam – Community-managed flood-proof water-filter ponds; volunteer early-warning networks (>101 k people reached in 2017 floods).
• World Vision India – Area Development Programmes (20 k–100 k population each); 2017 flood relief to 22 500 people.
• Plan India – Safe School Programme: structural retrofitting + non-structural measures (anchoring furniture, outward-opening doors) in 200 schools.

National Disaster Management Authority (NDMA)

• Established under DM Act 2005; chaired by Prime Minister (up to 9 members + optional Vice-Chair).
• Vision: “Safer & disaster-resilient India through holistic, proactive, technology-driven & sustainable strategy.”
• Core functions:

1. Lay down DM policies & approve National Plan.

2. Issue guidelines for States & Ministries (integration of DRR in projects).

3. Coordinate implementation & enforcement; recommend funding for mitigation.

4. Support foreign disaster relief; steer NIDM.
   • Key programmes: National Cyclone Risk Management Project, School Safety Project, Decision Support System, Facebook partnership for disaster response, etc.
   • Guideline suite (select list): Heat-wave, School Safety, Hospital Safety, Minimum Standards in Relief Camps, Earthquake/Tsunami/Cyclone/Flood/Urban Flood/Drought, Landslide, Nuclear, Chemical (industrial & terrorism), Biological, Psycho-social support, Incident Response System, Fire-service scaling, Seismic retrofitting, Disability-inclusive DRR, Temporary shelters.

Key Formulas & Numerical References

• Disaster risk basic relation: $\text{Risk}=\dfrac{\text{Hazard}\times\text{Vulnerability}}{\text{Capacity}}$
• Disaster Risk Index: $R=(H+V+E)-C$ (indices summed for hazard, vulnerability, exposure; capacity subtracts risk).
• Minimum water sanitation metric (Sphere): ensure \ge15 L safe water per person per day; residual chlorine 0.5 mg/L at tap.
• Power outage critical threshold: discard refrigerator perishables after >4 h.

Ethical, Philosophical & Practical Implications

• Human-security framework shifts focus from asset protection to people-centred safety & empowerment.
• DRR legislation embodies social contract: state obligation to safeguard citizens through foresight, preparedness & inclusive governance.
• “Build back better” ethic converts tragedy into opportunity for safer, more resilient communities.