Risk Assessment and Mitigation Flashcards

Which climate change scenario dataset, published by the Intergovernmental Panel on Climate Change (IPCC), is most commonly referenced in long-term infrastructure risk assessments?

Answer: Shared Socioeconomic Pathways (SSPs)

IPCC Shared Socioeconomic Pathways provide standardized greenhouse gas emissions trajectories used globally to project climate hazard exposure for long-lived infrastructure.

A project team determines that a proposed stormwater detention pond will eliminate downstream flooding risk for a 100-year storm event. This mitigation strategy primarily reduces which risk dimension?

Answer: Probability of the hazard

By capturing and slowly releasing stormwater, the detention pond reduces the probability that the downstream area will experience damaging flood levels.

Under FEMA's Risk Mapping, Assessment, and Planning (Risk MAP) program, what is the primary output used by local governments for land-use planning?

Answer: Flood Insurance Rate Maps (FIRMs)

Flood Insurance Rate Maps delineate Special Flood Hazard Areas and base flood elevations, directly informing local zoning and development regulations.

A sustainability professional conducting a risk register update discovers that a previously 'low' risk has escalated to 'high' due to new climate data. The BEST next step is to:

Answer: Escalate to decision-makers and develop new mitigation options

Dynamic risk management requires that newly elevated risks be escalated to appropriate decision-makers and that mitigation options be re-evaluated promptly.

Which principle guides the recommendation to design infrastructure for hazard events beyond the current regulatory minimum standard?

Answer: Factor of safety principle for resilience

Applying a factor of safety—designing beyond the minimum standard—builds in resilience against uncertainty in hazard projections and future climate changes.

In a quantitative risk assessment for a water supply project, analysts determine the annual probability of a drought causing a service disruption is 0.04. What is the return period for this event?

Answer: 25 years

Return period equals 1 divided by the annual exceedance probability; 1/0.04 = 25 years, meaning the event is expected once every 25 years on average.

Which of the following is an example of a 'nature-based' risk mitigation strategy for coastal erosion?

Answer: Restoring and expanding mangrove forests

Mangrove restoration is a nature-based solution that dissipates wave energy and stabilizes sediment, providing coastal protection while delivering co-benefits.