Natural Hazards and Disasters - Part 2
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Questions and Answers

Which of the following is classified as a seismic hazard?

  • Tsunamis (correct)
  • Debris avalanches
  • Landslides
  • Storm surges
  • Which of these hazards is NOT a direct result of volcanic activity?

  • Tephra
  • Acid rain
  • Lava flows
  • Salinization (correct)
  • What type of hazard is most closely associated with 'jökulhlaups'?

  • Hydrologic
  • Seismic
  • Geologic (correct)
  • Atmospheric
  • Which of these is classified as an astronomic hazard?

    <p>Bolide impact (A)</p> Signup and view all the answers

    Increased strength of storms and increased forest fires are consequences of which type of hazard?

    <p>Climate Change (D)</p> Signup and view all the answers

    What primarily determines the potential for recovery from a natural disaster?

    <p>The type of disaster combined with the magnitude and frequency of similar events. (A)</p> Signup and view all the answers

    Which of the following is an example of an indirect effect of a natural disaster?

    <p>Emotional distress and loss of employment. (D)</p> Signup and view all the answers

    According to the generalized disaster recovery model, what is the primary focus during the initial two weeks after a disaster?

    <p>Emergency work and altered work routines (B)</p> Signup and view all the answers

    What is the relationship between the return periods and peak flow of the Fraser River floods as indicated by the data?

    <p>As average return periods increase, peak flow tends to increase. (A)</p> Signup and view all the answers

    Which of these is the best description of a correlation between two variables?

    <p>The variables move in relation to each other, regardless of a causal link. (B)</p> Signup and view all the answers

    Why might reconstruction after a disaster be more time-consuming and costly than initially planned?

    <p>Subsequent events damage already weakened or unrepaired infrastructure. (C)</p> Signup and view all the answers

    Which of the following is the best example of causation?

    <p>Increased government spending and increased inflation. (B)</p> Signup and view all the answers

    What does a negative correlation between two variables typically indicate?

    <p>One variable increases as the other decreases. (D)</p> Signup and view all the answers

    Which of the following is an example of an anthropogenic influence on a natural hazard?

    <p>An increase in flood risk due to deforestation. (D)</p> Signup and view all the answers

    Which of the following options could be both natural and anthropogenic?

    <p>Climate change (A)</p> Signup and view all the answers

    What is a primary reason for using a systems approach when analyzing hazards?

    <p>To organize analysis by the source and amount of energy. (A)</p> Signup and view all the answers

    Which of the following processes is NOT primarily driven by Earth's internal heat?

    <p>Atmospheric circulation. (A)</p> Signup and view all the answers

    What is the main role of the sun's energy in creating hazards?

    <p>To cause atmospheric and ocean circulation that leads to winds and weather events. (B)</p> Signup and view all the answers

    Which of the following is an example of a hazard mainly influenced by the gravitational attraction of the Earth?

    <p>Landslides. (C)</p> Signup and view all the answers

    What is the key difference between a 'cause' and a 'trigger' in the context of hazards?

    <p>A 'cause' is a long-term condition, while a 'trigger' is a short-term event. (A)</p> Signup and view all the answers

    According to the provided definitions, what would best describe a long period of drought that leads to soil cracking and makes the ground unstable?

    <p>A cause. (D)</p> Signup and view all the answers

    What is identified as a significant limitation of any conceptual framework for hazards?

    <p>The inability to record, analyze, or predict all scenarios with certainty. (A)</p> Signup and view all the answers

    Which of the following is NOT a listed reason for the limitations of a conceptual framework for hazard analysis?

    <p>Lack of funding. (A)</p> Signup and view all the answers

    Which factor necessitates a balanced, multi-lateral approach to the study of hazards and disasters?

    <p>Economic globalization and the interconnectedness of the global environment. (A)</p> Signup and view all the answers

    What is one of the primary reasons that the effects of natural hazards are becoming more severe?

    <p>An increase in global temperatures and other human activities. (B)</p> Signup and view all the answers

    According to the framework for decision-making, what is the main goal of hazard prediction?

    <p>To accurately forecast future activity based on past occurrences. (D)</p> Signup and view all the answers

    Why is risk analysis important in understanding hazardous processes?

    <p>It enables the quantification of events to estimate both probability and consequences. (C)</p> Signup and view all the answers

    What is an example of how one hazard can trigger another?

    <p>An earthquake causing a tsunami. (A)</p> Signup and view all the answers

    What is a consequence of increasing populations and financial investments in hazard-prone areas?

    <p>An increase in the number of people and financial investments at risk. (B)</p> Signup and view all the answers

    The 2011 earthquake in Japan serves as an example of what aspect of natural disasters?

    <p>How distant events can have wide-reaching effects. (A)</p> Signup and view all the answers

    What was the primary impact of the Nov 2021 rains that closed highways in southern BC?

    <p>A temporary closure of ground transport and subsequent need to re-route through the northern US. (C)</p> Signup and view all the answers

    Which of the following best describes the relationship between hazard and risk?

    <p>Hazard is the potential to cause harm, and risk is the likelihood of that harm. (A)</p> Signup and view all the answers

    What distinguishes an event described as a 'catastrophe' from one described as a 'disaster'?

    <p>A catastrophe is assumed to be a much larger event with direct and indirect consequences, while a disaster is considered limited in area and direct consequences. (B)</p> Signup and view all the answers

    In the context of decision-making, what is the key difference between risk and uncertainty?

    <p>Risk involves known potential outcomes and probabilities, while uncertainty involves unknown outcomes and/or probabilities. (B)</p> Signup and view all the answers

    Which of these best describes vulnerability in the context of natural hazards?

    <p>The weakness in a system that has no context to the impact involved. (B)</p> Signup and view all the answers

    According to the magnitude-frequency relation, what generally happens to the magnitude of an event as its frequency increases?

    <p>The magnitude decreases as the frequency increases. (C)</p> Signup and view all the answers

    Based on the content provided, why is 'susceptibility' more likely to happen to people than 'vulnerability'?

    <p>Susceptibility is likely to happen to people because it results from a risk, but vulnerability is not (C)</p> Signup and view all the answers

    What does the equation $M = Fe^{-x}$ represent in the context of natural hazards?

    <p>The relationship between magnitude and frequency of events. (D)</p> Signup and view all the answers

    Why do earthquakes with high frequency generally have a lower magnitude?

    <p>The energy is released more gradually with each quake. (A)</p> Signup and view all the answers

    What geological debate was centered on the importance of large, rare events vs. small, frequent ones?

    <p>The debate between catastrophism and uniformitarianism. (B)</p> Signup and view all the answers

    Which of the following is an example that best illustrates the difference between risk and impact?

    <p>Knowing the probability of an earthquake in a particular city versus the consequences of damages from that earthquake (B)</p> Signup and view all the answers

    Match the disaster effects with their typical timing relative to the event:

    <p>Deaths, injuries, displacement of people = Direct effects occurring around time of event Crop failure, starvation, emotional distress = Indirect effects occurring after the event Property damage = Direct effects occurring around time of event Loss of tax revenues = Indirect effects occurring after the event</p> Signup and view all the answers

    Match the stages of disaster recovery with their description:

    <p>Emergency work = Initial actions; normal work stops or changes Restoration of services and communication = Normal work returns but not at full capacity Reconstruction = Material is replaced, major new construction is completed Full normality = Life returns to normal</p> Signup and view all the answers

    Match each hazard with its primary energy source:

    <p>Plate tectonics = Earth's Internal Heat Hurricanes = Energy From the Sun Landslides = Gravitational Attraction of the Earth Asteroid Impacts = Gravitational Attraction of the Earth</p> Signup and view all the answers

    Match the typical duration of disaster response phases:

    <p>Emergency phase = First 2 weeks Restoration phase = Several months Reconstruction phase = Longer term, indefinite Full normality = After reconstruction is complete</p> Signup and view all the answers

    Match these terms related to hazards with their correct definition:

    <p>Cause = Long-term buildup of conditions leading to a hazard Trigger = Short-term event initiating a hazard Conceptual Framework = Systematic way to record and analyze phenomena Systems Approach = Organizing analysis by energy source</p> Signup and view all the answers

    Match a description of the recovery with its effect on the society after the event:

    <p>Emergency work = Normal work stops or changes Restoration of services and communication = Normal work returns but not at full capacity Reconstruction = Material replaced, major new construction is completed and new phase begins Full normality = Life returns to normal</p> Signup and view all the answers

    Match each hazard type with its associated process:

    <p>Volcanoes = Mantle convection Tornadoes = Atmospheric circulation Avalanches = Mass wasting Floods = Evaporated water</p> Signup and view all the answers

    Match the following actions with the phase of disaster recovery they belong to:

    <p>Clearing debris = Emergency work Repairing utilities = Restoration of services and communication Building new infrastructure = Reconstruction Resuming daily life = Full normality</p> Signup and view all the answers

    Match each mechanism to its contribution to Earth's internal heating:

    <p>Radioactivity of elements = Release of energy from unstable atoms Collisions of atoms = Kinetic energy converted to heat Compression = Increase in pressure, generating heat Mantle convection = Transfer of heat within the Earth</p> Signup and view all the answers

    Match each term to its specific consequence:

    <p>Earth's Internal Heat = Earthquakes and volcanoes Energy From the Sun = Violent storms Gravitational Attraction = Mass wasting processes Mantle Convection = Plate tectonics</p> Signup and view all the answers

    Match the following processes with their respective effects:

    <p>Evaporation = Atmosphere and ocean circulation Mantle Convection = Plate movement Downslope movement = Landslides Radioactivity = Earth's internal heating</p> Signup and view all the answers

    Match each geological process with its associated hazard:

    <p>Plate Tectonics = Earthquakes Atmospheric Circulation = Hurricanes Mass Wasting = Landslides Mantle convection = Volcanic Eruptions</p> Signup and view all the answers

    Match the energy source with the type of hazard it primarily influences:

    <p>Earth's Internal Heat = Seismic activity Energy From the Sun = Atmospheric phenomena Gravitational Attraction = Mass movements Solar Radiation = Climate variability</p> Signup and view all the answers

    Match each term with its most closely related concept:

    <p>Cause = Long-term condition buildup Trigger = Immediate initiating event Systems Approach = Integrated multidisciplinary analysis Conceptual Framework = Organization and analysis system</p> Signup and view all the answers

    Match the following concepts from the 'Smart Hazard Approach' with their descriptions:

    <p>Economic Globalization = Increased interconnectedness of economies making disasters impacts broader Multi-national Information Access = Wider sharing of data and learning about responses to hazards Negative Impact of Humans = Anthropogenic alteration of the environment increasing both frequency and magnitude of events Balanced, Multi-lateral Approach = Comprehensive study incorporating multiple aspects and perspectives on hazards</p> Signup and view all the answers

    Match each concept with its appropriate description in the context of hazard decision-making:

    <p>Hazard Prediction through analysis = Using past data to estimate future events Risk Analysis = Quantifying hazardous processes to estimate probable consequences Linkages among hazards = The potential for one hazard to trigger another Increase in hazard damage = Combined effect of population growth and climate change</p> Signup and view all the answers

    Match the following effects of natural hazards with their descriptions:

    <p>Temporary closure of highways in BC = Disruption of ground transportation and supply chains Radiation leak in Japan = Trans-boundary effects of disasters Increased population = More people at risk when a disaster occurs Climate change = Increased frequency and magnitude of natural disturbances</p> Signup and view all the answers

    Match each hazard effect with its consequence:

    <p>Earthquake = Tsunami generation Heavy Rain = Landslide occurrence Increased human activity = Increased risk and magnitude of hazards Population growth = Increased damage due to hazards</p> Signup and view all the answers

    Match the following events to the framework of hazard decision-making concepts they best represent:

    <p>2011 Japan earthquake causing a radiation leak = Linkages among different natural hazards and between them and their physical environment Southern BC highways closing due to Nov 2021 rains = Damage from hazards is increasing Forecasting future activity based on past events = Hazards can be predicted through scientific analysis Estimating the probability of a specific event = Risk analysis is an important tool in understanding the effects of hazardous processes</p> Signup and view all the answers

    Match each concept with its description regarding disaster severity:

    <p>Hazard = A dangerous phenomenon Disaster = Event causing significant disruption and loss Catastrophe = An overwhelming event with widespread severe impact Vulnerability = The potential for a population to suffer from an event</p> Signup and view all the answers

    Match each concept with the primary context in which it is used:

    <p>Frequency = How often an event occurs Magnitude = The size or intensity of an event Return Period = Average time between events of similar size Impact = The ultimate effect of an event upon society and the environment</p> Signup and view all the answers

    Match the following terms with their descriptions:

    <p>Hazard = The potential to cause harm Risk = The likelihood of harm taking place with known probability Vulnerability = A weakness in a system, without direct impact context Susceptibility = Something that is likely to happen to people as a result of risk</p> Signup and view all the answers

    Match the type of event with its scale of impact:

    <p>Disaster = An event limited in area with direct consequences Catastrophe = An event on a larger scale with direct and indirect consequences Hazard = The potential for harm without necessarily occuring Risk = The probability of event and consequence occurring</p> Signup and view all the answers

    Match the following concepts with their relationships in risk analysis:

    <p>Risk = Dependent on probability Impact = The consequences if the risk occurs Uncertainty = Outcomes and probabilities not known to the decision-maker Vulnerability = Independent of of risk itself</p> Signup and view all the answers

    Match the following hazard related concepts with their descriptions:

    <p>Magnitude = The amount of energy released by an event Frequency = How often a similar event happens Catastrophism = Importance of large, rare events shaping Earth Uniformitarianism = Importance of many small, frequent events</p> Signup and view all the answers

    Match these terms with their explanation:

    <p>Risk = An event that may or may not happen, with probability known Vulnerability = A weakness in a system without considering any impact Impact = What results if and when a risk occurs Susceptibility = Something that is likely to happen because of a risk</p> Signup and view all the answers

    Match the concept to the the description:

    <p>Risk = An event with a known probability of occurrence Uncertainty = An event with unknown outcomes or probabilities of occuring Hazard = A potential to cause harm Impact = Consequences of a a risk occuring</p> Signup and view all the answers

    Match the following terms from the natural hazards discussion with their explanations:

    <p>Disaster = An event limited in area with direct effects Catastrophe = A larger scale event with direct and indirect effects Magnitude = Related to the amount of energy released by an event Frequency = How often an event of a similar type happens</p> Signup and view all the answers

    Match these terms relating to natural events with their descriptions:

    <p>Magnitude = The amount of energy released, affecting impact size Frequency = How often an event occurs, influencing overall risk Catastrophism = Geological theory emphasizing large catastrophic events Uniformitarianism = Geological theory emphasizing gradual change through time</p> Signup and view all the answers

    Match the concepts with their associated factors:

    <p>Risk = Probability of an event occurring Impact = Consequences of an event should occur Vulnerability = Weakness in a system, independent of risk Susceptibility = Likelihood of someone being affected by a risk</p> Signup and view all the answers

    Match the following terms related to risk and outcomes:

    <p>Risk = Determined by the event's chance of occurence Impact = Related to the severity of a risk's effects Uncertainty = Presence of unknown outcomes or probabilities Vulnerability = Present regardless of impact</p> Signup and view all the answers

    Match the following terms with their descriptions regarding natural hazards:

    <p>Correlation = Statistical relationship showing how two variables move together, without implying cause Causation = Direct relationship where one variable's change produces a change in another Natural = Systems or actions not directly influenced by human activity Anthropogenic = Systems or actions influenced or caused by human activity</p> Signup and view all the answers

    Match the type of hazard to its description:

    <p>Avalanches = Rapid flow of snow down a slope Landslides = Movement of soil and rock down a slope Slip on ice = Reduction in friction causing a loss of balance Floods = Water levels that exceed capacity of a channel or region</p> Signup and view all the answers

    Match the concepts related to hazard analysis with their descriptions:

    <p>Natural hazard = A phenomenon that can cause harm or damage, occurring independent of human action Anthropogenic hazard = A phenomenon that can cause harm or damage, directly or indirectly influenced by human activity Hazard = A potentially dangerous phenomenon, substance, human activity (e.g. building) or condition that may cause loss of life, injury or other health impacts Risk = The probability of a specific hazard event causing some defined amount of harm, damage or other loss</p> Signup and view all the answers

    Match the following terms with their descriptions related to variables:

    <p>Positive correlation = Variables changing in the same direction Negative correlation = Variables changing in opposite directions Causation relationship = Change in one variable causes change in the other Correlation relationship = Variables move in association with each other, but are not a direct cause</p> Signup and view all the answers

    Match each scenario with its classification relative to the causes of hazards:

    <p>Climate warming leading to increased fires and floods = Predominantly anthropogenic, but with natural influences Earthquakes leading to tsunamis = Predominantly natural Landslide caused by clear-cutting forest for development = Predominantly anthropogenic Heavy rainfall leading to severe flooding = Predominantly natural, exacerbated by anthropogenic changes</p> Signup and view all the answers

    Relate each process below with potential influencing factors:

    <p>Landslides = Slope, vegetation, saturation and seismic activity Avalanches = Slope, snowpack, temperature and weather Slip on ice = Temperature, surface condition, gravity and material type Flooding = Rainfall, snowmelt, channel capacity and land use</p> Signup and view all the answers

    Match the hazard causes with whether they are primarily 'natural' or 'anthropogenic':

    <p>Volcanic Eruptions = Primarily natural Deforestation leading to soil erosion and landslides = Primarily anthropogenic A severe drought caused by a change in weather patterns = Primarily natural, but perhaps exacerbated by anthropogenic climate change Greenhouse gas emissions causing increased CO2 in atmosphere = Primarily anthropogenic</p> Signup and view all the answers

    Match the concepts relating to how variable are related:

    <p>Correlation = Two variables that co-occur or change together Positive Correlation = Two variables that increase or decrease together Negative Correlation = When one variable increases and the other decreases, or vice versa Causation = When one variable directly causes a change in another variable</p> Signup and view all the answers

    Match the concepts relating to human and nature's roles:

    <p>Primarily Natural = Not directly impacted by humans Primarily Anthropogenic = Mostly or entirely a result of humans Nature influencing Natural Hazard = A system or process of the environment that has or increases the chances of a hazard occurring Human influencing Natural Hazard = An action by a person or group that has or increases the chance of a hazard occurring</p> Signup and view all the answers

    Match the concept with its description:

    <p>Climate change = A significant change in the average weather patterns, it may be natural, but recent changes are largely driven by human activity Greenhouse Gas Emissions = The release of gases such as carbon dioxide into the atmosphere which helps trap heat from the sun Natural hazard = A natural event that can cause harm to humans Anthropogenic climate change = Changes to the climate that can be directly attributed to human actions and activity</p> Signup and view all the answers

    Study Notes

    Natural Hazards and Disasters - Introduction Part 2

    • A smart hazard approach is needed due to economic globalization, multi-national information access, and negative human impact on the global environment.
    • Examples include the 2011 earthquake in Japan, which caused a radiation leak and tsunami affecting Western North America. The 2021 BC floods and related transportation issues further highlighted these interconnected problems.
    • The 2018 earthquake in Palu, Indonesia is another example of widespread damage.

    A Smart Hazard Approach

    • People are concerned with hazards common to their locations, like Calgary floods and Vancouver earthquakes.
    • A balanced, multi-lateral approach is required for studying hazards and disasters.
    • A conceptual framework for decision making includes predicting hazards via scientific analysis.
    • Monitoring and mapping events for making predictions is crucial.
    • It's possible to forecast future events based on past frequency, magnitude, and occurrence patterns.
    • Also, risk analysis is important for understanding hazardous processes.
    • Quantifiable events, including their estimated probabilities and consequences, are essential.
    • Different natural hazards and their relationships to the environment are interconnected; one process can trigger another. Examples include earthquakes causing tsunamis and heavy rain causing landslides.

    Damage from Hazards

    • Damage from natural hazards is increasing, turning previously considered disasters into catastrophes.
    • Growing populations and investments are at higher risk.
    • Increased human activity and climate change are escalating the frequency and magnitude of events.
    • Damage in Dawson Springs, Kentucky from a 2021 tornado is further evidence of increasing hazard impacts.

    Limitations of the Conceptual Framework

    • Despite good systems, some situations are unpredictable or impossible to analyze or record with definitive certainty.
    • This could be due to remote locations, rapid events, forces too large to measure, or poorly understood processes.

    Systems Approach

    • Analyses require organization.
    • Natural hazards are processes needing energy to function.
    • Understanding energy source and amount is important to understanding hazards.
    • Three energy sources are Earth's internal heat, energy from the sun, and gravitational attraction of Earth.

    Earth's Internal Heat

    • After Earth's formation, three mechanisms lead to internal heating: collisions of atoms, compression, and the radioactivity of elements.
    • These mechanisms create slow mantle convection, causing plate tectonics, leading to earthquakes and volcanoes.

    Energy from the Sun

    • Solar energy drives atmospheric and ocean circulation, making winds and evaporating water.
    • This creates climate patterns and violent weather events like hurricanes, tornadoes, hail, droughts, floods, and erosion.

    Gravitational Attraction of Earth

    • Earth's gravity drives mass-wasting processes: materials moving downhill such as avalanches, landslides, and mudslides.
    • Earth's gravity also attracts objects from space, leading to impacts from asteroids and meteorites.

    Conceptual Framework for Decision-Making - Risk Analysis

    • Risk analysis helps to understand the effects of hazardous processes.
    • Risk analysis quantifies events and helps to estimate probabilities and consequences.

    Conceptual Framework for Decision-Making - Linkages

    • Linkages exist among different natural hazards and between hazards and their physical environment.
    • One process can trigger another.

    Terminology - Cause vs Trigger

    • Both describe what makes a hazard occur but in different time frames:
    • Cause: long-term buildup of conditions creating the hazard
    • Trigger: short-term event initiating the hazard's action
    • Often, they are used interchangeably.

    Terminology - Correlation vs Causation

    • Correlation: describes the degree to which two variables move together statistically.

    • Positive correlation: variables change in the same direction.

    • Negative correlation: variables change in opposite directions.

    • Correlation does not imply causation.

    • Causation: a direct cause-and-effect relationship is established, such that a change in the first variable causes a change in the second.

    Terminology - Risk vs Impact vs Vulnerability

    • Risk: Likelihood of harm (probability is known).
    • Impact: What happens if the risk occurs.
    • Vulnerability: Weaknesses in a system (not always directly related to the hazard).

    Terminology - Disaster vs Catastrophe

    • Both refer to events causing serious injury or death along with property damage, but happen in a limited time frame:
    • Disaster: limited in area, with direct consequences
    • Catastrophe: larger scale, with direct and indirect (more often) consequences, and therefore much more costly to remediate.

    Magnitude and Frequency (Earthquakes, etc.)

    • People most often are concerned with how big natural hazards are and how often they happen.
    • Magnitude relates to the amount of energy released, and frequency to how often events happen.
    • Larger events occur less frequently, smaller events occur more frequently.
    • Magnitudes and frequencies can be described mathematically.
    • In the past, geologists debated whether rare, large events or common smaller events have a more significant impact on Earth's formation.

    Reactive Response - Recovery

    • Recovery attempts for natural disasters can vary greatly depending on the type of disaster and how often similar events occur.
    • Disaster effects can be direct (like deaths, injuries, and property damage) or indirect (like crop failure, starvation, emotional distress, or loss of employment or tax revenue).
    • The importance of indirect effects might not always be readily apparent.

    Stages of Recovery

    • Stages to recovery from disasters usually include emergency work, restoration of services and communication, and reconstruction.
    • Disasters can cause long-term recovery due to weakened infrastructure and limited resources to repair damage.
    • A general model illustrates the different periods in disaster recovery.

    Potential Natural Hazards

    • A list of natural hazards is available, by types (atmospheric, seismic, hydrologic, volcanic, wildfire, etc.) and specific examples.

    Hazards by Season

    • Natural hazards vary based on the time of year, latitude and hemisphere.
    • Some examples are given of when specific hazards are most likely to occur. This information (along with the other parts of these notes) provides a framework for better understanding natural hazards and the associated concepts from which decisions can be made.

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    Explore the interconnected challenges posed by natural hazards and disasters in today's globalized world. This quiz discusses the implications of events like the 2011 Japan earthquake and the 2021 BC floods, while emphasizing the importance of a smart hazard approach. Gain insights into risk analysis, prediction, and monitoring for disaster management.

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