IB Geography D.5.3 Perspectives on Managing Geophysical Hazard Risks Notes

Stakeholders Judge Management Through Different Priorities

1. Role shapes perspective because a resident, planner, scientist, insurer and business owner carries different duties and possible losses.
2. Evidence access differs where institutions hold technical forecasts while residents hold local knowledge of routes, livelihoods and previous warning failures.
3. Capacity to act determines whether a stakeholder can convert preference into zoning, investment, evacuation or rebuilding.
4. Residents prioritise safety and continuity; they may support protection but resist relocation that separates them from homes, livelihoods and social networks.
5. Governments balance risk with public finance; they must choose between expensive protection, restricted development, emergency readiness and spending on other services.
6. Scientists focus on evidence and uncertainty; monitoring can estimate probability and location but rarely states exactly when an event will occur.
7. Businesses value continuity and access; closures and exclusion zones reduce immediate risk but may interrupt tourism, trade and employment.
8. Insurers price expected loss; premiums, exclusions and compensation can encourage safer decisions or leave lower-income households without cover.

Acceptable Risk Is a Political Choice

1. Consent is stronger when exposed groups understand uncertainty and can influence decisions rather than receiving a completed plan.
2. Procedural justice evaluates who participates and how decisions are made, while distributive justice evaluates who receives protection and who carries costs.
3. Risk tolerance may differ between voluntary and imposed exposure, particularly where people cannot afford safer housing or relocation.
4. Zero risk is rarely attainable; some danger remains after any intervention and is known as residual risk.
5. People accept risk unevenly; familiar hazards, voluntary choices, trust in authorities and perceived benefits influence willingness to remain exposed.
6. Costs and benefits are distributed unevenly; a barrier may protect valuable property while transferring risk or environmental damage elsewhere.
7. Time horizon changes judgement; a cheap short-term measure may create higher maintenance or reconstruction costs later.
8. Uncertainty creates disagreement; stakeholders may interpret the same forecast differently because their responsibilities and potential losses differ.

Named Examples Reveal Competing Perspectives

1. Montserrat trade-off involved life-saving exclusion alongside long-term displacement, reduced land access and dependence on decisions made under scientific uncertainty.
2. Merapi trade-off placed evacuation safety against livestock protection, fertile land and cultural attachment, making compliance dependent on trust and practical support.
3. Insurance trade-off spreads financial loss but can exclude high-risk households through premiums, deductibles and coverage limits.
4. Montserrat used exclusion zones after volcanic activity; authorities prioritised life safety while displaced residents lost access to homes, land and community connections.

1. Merapi residents faced livelihood trade-offs; farmers living near fertile volcanic soils weighed official evacuation advice against livestock, crops and place attachment.
2. New Zealand's EQCover spreads household loss; public insurance supports recovery, although coverage limits and rebuilding costs shape who remains financially exposed.
3. Land-use zoning protects future residents; current landowners may oppose reduced development rights or property values even when the wider community gains safety.
4. Build Back Better can reduce future vulnerability; rapidly displaced households may instead prioritise immediate shelter and income over longer-term design standards.

Evaluate Management with Consistent Criteria

1. Cost-effectiveness compares risk reduction with full lifecycle cost rather than initial construction alone.
2. Robustness tests whether a strategy still works if the event exceeds expectations or communications and power fail.
3. Reversibility values measures that can be adjusted as monitoring and settlement change, especially where scientific uncertainty is high.
4. Effectiveness measures risk reduction; judge whether deaths, injuries, disruption or expected losses fall.
5. Equity examines distribution; ask whether marginalised groups can access warnings, evacuation, insurance and reconstruction support.
6. Feasibility tests implementation; a technically strong plan may fail without finance, legal authority, staff, maintenance or public trust.
7. Sustainability considers future conditions; management should avoid transferring risk to another place, group or generation.
8. Adaptability matters under uncertainty; monitoring and review allow thresholds, zones and procedures to change as evidence improves.

A Balanced Judgement Is Conditional

1. Dominant criterion should be stated because the best strategy for mortality reduction may differ from the best strategy for livelihoods or equity.
2. Short and long term can point to different conclusions when rapid evacuation saves lives but prolonged exclusion damages income and community ties.
3. Decision rule should identify the conditions under which the preferred strategy would change rather than claiming one universal solution.
4. Match the strategy to the event profile; rapid-onset hazards need resilient construction and rehearsed action, while monitored eruptions may allow staged evacuation.
5. Match responsibility to capacity; households cannot enforce building codes and governments cannot make every personal evacuation decision.
6. Recognise trade-offs openly; strong evaluation explains what is gained, what is sacrificed and which group decides.
7. Use evidence from contrasting places; differences in governance, wealth, culture and previous experience reveal why the same strategy performs differently.
8. Conclude with conditions for success; the strongest option depends on hazard mechanism, local trust, enforcement and the resources available over time.