Understanding Community Resilience from a PRA Perspective Using Binary Decision Diagrams.
Saeed Nozhati1, Bruce R Ellingwood1, Hussam Mahmoud1
1Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO, USA.
Summary
This study uses probabilistic risk assessment (PRA) to model community food security, assessing earthquake impacts on food supply chains and infrastructure in Gilroy, CA. It highlights PRA
Area of Science:
- Systems Engineering and Risk Analysis
- Community Resilience and Food Security
- Infrastructure Interdependencies
Background:
- Community resilience is crucial for mitigating disaster impacts.
- Food security is a key component of community well-being, vulnerable to infrastructure disruptions.
- Existing risk assessment tools often lack integration for complex, interconnected systems.
Purpose of the Study:
- To adapt industrial and nuclear Probabilistic Risk Assessment (PRA) methodologies for community resilience.
- To model and evaluate the food security of a community (Gilroy, CA) considering its built environment as an integrated system.
- To identify critical infrastructure interdependencies affecting food supply during an earthquake.
Main Methods:
- Utilized PRA tools and techniques, including fault and event trees, to model food supply continuity.
- Employed Binary Decision Diagrams (BDDs) for efficient analysis of system performance.
- Integrated food retailers, power networks, water systems, and bridges into a unified system model.
Main Results:
- Identified shortcomings in traditional system analysis methods for assessing community resilience.
- Quantified the impact of infrastructure failures (power, water, bridges) on food supply.
- Utilized importance factors to rank the contribution of various elements to food insecurity risk.
Conclusions:
- PRA offers a robust framework for evaluating community resilience and food security.
- The integrated systems approach reveals critical interdependencies impacting food supply.
- The methodology is adaptable to various infrastructure systems and other hazard scenarios.
Related Concept Videos
02:39Phase Diagrams
49.9K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
49.9K
01:26Binary Fission
2.6K
Binary fission is the primary mode of asexual reproduction in prokaryotes, such as bacteria. It results in the production of two genetically identical daughter cells. This highly efficient process ensures the rapid propagation of bacterial populations under favorable conditions and involves coordinated cellular and molecular events.DNA Replication and SeparationThe process begins with the replication of the bacterial chromosome. The circular DNA molecule unwinds at a specific origin of...
2.6K
01:20Binary Fission
63.0K
Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
63.0K
00:30What are Populations and Communities?
37.4K
Overview
37.4K
01:28Understanding the Self
248
The self is a central aspect of human identity, encompassing an individual’s beliefs, emotions, perceptions, and experiences. It is a cognitive and psychological construct that enables individuals to interpret their traits and behaviors, influencing how they perceive themselves and interact with the world. While personality consists of stable and enduring characteristics, the self is shaped by self-perception and social experiences. This distinction highlights the dynamic nature of the...
248
01:19Phase Diagram
7.0K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
7.0K