lec 2 ~ natural hazards + disasters

studied byStudied by 2 people
5.0(1)
get a hint
hint

what is a hazard?

1 / 23

Tags and Description

24 Terms

1

what is a hazard?

a phenomenon that could become a problem/disaster

New cards
2

what is a disaster?

an event involving significant number of people and/or economic damage

New cards
3

why has the number of disasters increased over the years?

inc of hydrometeorological hazards due to climate change

disasters were more under recorded in the past

New cards
4

why has the overall number of people affected increased over the years?

population has grown as well

New cards
5

why have the number of deaths from disasters decreased over the years?

better tech

more awareness/education

better preventative measures (eg. better infrastructure)

New cards
6

what is an official disaster based on OFDA/CRED?

10+ deaths and/or

100+ people affected and/or

declaration of state of emergency

New cards
7

what is an official disaster based on UN?

serious disruption of a community

widespread human, material, economic or enviro impact

exceeds communities ability to cope on own

New cards
8

what is exposure?

the likelihood of a certain hazard occurring

New cards
9

what is sensitivity?

the degree to which a community/individual could be impacted and level of their preparedness

New cards
10

what is vulnerability?

vulnerability = exposure + sensitivity

New cards
11

what is probability?

the statistical likelihood of an event occurring

New cards
12

what is a recurrence interval (return period)?

the average number of years between an event of a certain size in a location

New cards
13

are natural hazards interconnected?

yes

New cards
14

are small, frequent events common or uncommon?

common

New cards
15

are big, unfrequent events common or uncommon?

uncommon

New cards
16

how does the news affect our perception of disasters?

“spectacular” disasters get more coverage despite not being as common or as devastating

New cards
17

what are rapid-onset disasters?

begin quickly

people dont have time to prepare

most are short duration

eg. earthquakes

New cards
18

what are slow-onset disasters?

take days or weeks to develop

people have tiem to prepare

most are long duration

eg. floods

New cards
19

what are very slow-onset disasters?

take months, years or decades to develop

eg. sea level rise, drought, climate change

New cards
20

why do people live where they are vulnerable to hazards?

can provide fertile soils and scenic views

memory of previous disasters is gone

community established before hazard was known

no option

New cards
21

what is mitigation?

taking actions to physically reduce exposure of community to hazard

New cards
22

what is adaptation?

accepting the hazard will occur and taking actions to reduce the impact, sensitivity and vulnerability of the community

New cards
23

what are the approcahes to mitigation?

1. affecting the cause - reducing likelihood of it occurring

2. modifying the hazard - constructing engineering solutions or relocation

3. modify potential loss - reduce economic and social sensitivity and vulnerability (eg. earthquake resistant buildings)

4. spread the loss - distribute economic loss to broader group

5. plan for loss - measure budget of damage that hazard could cause

6. bear the loss

New cards
24

what are the approaches to natural hazard assessments?

1. assessment of degree of exposure

2. evaluation of communities sensitivity to a hazard

New cards

Explore top notes

note Note
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 13 people
Updated ... ago
5.0 Stars(2)
note Note
studied byStudied by 11 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 52 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 32 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 29578 people
Updated ... ago
4.8 Stars(284)

Explore top flashcards

flashcards Flashcard99 terms
studied byStudied by 17 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard123 terms
studied byStudied by 12 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard154 terms
studied byStudied by 2 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard25 terms
studied byStudied by 1 person
Updated ... ago
5.0 Stars(1)
flashcards Flashcard57 terms
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard63 terms
studied byStudied by 20 people
Updated ... ago
5.0 Stars(4)
flashcards Flashcard22 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard164 terms
studied byStudied by 47 people
Updated ... ago
5.0 Stars(1)