L.5. Impacts of tropical cyclones

Question 1

1. Primary Impacts

2. Secondary Impacts

Answer 1

1. The direct impacts of event, usually occurring instantly.

2. The indirect impacts of an event, usually occurring in the hours, weeks, months or years after the event.

Question 2

Vulnerability?

Answer 2

the inability to resist a hazard or to respond when a disaster has occurred.

Question 3

Impacts of Tropical cyclones:

Answer 3

• High winds
• Intense rainfall
• Storm surges
• Coastal flooding
• Landslides

Question 4

High Winds…

Tropical cyclones produce winds of over 119km per hour to 250km per hour.

Answer 4

Impact on people:
Strong winds can destroy and damage buildings and infrastructure such as power cables.
Impact on Environment:
Trees can be uprooted and debris can be blown by the wind.

Question 5

Intense rainfall…

Tropical cyclones take up water from oceans which is released as rainfall when they reach land.

Answer 5

Environment:
Intense rainfall can lead to flooding and fast-flowing water.
People:
Flooding can halt farming and tourism – causing a negative economic impact.

Question 6

Storm Surges
A tropical cyclone causes low pressure to the sea level can rise up. When this is combined with winds, it is driven towards the land as a storm surge.

Answer 6

People
Storm Surges can also damage coastal defences and farmland.
Environmental
These surges can erode beaches and coastal habitats.

Question 7

Coastal Flooding

Intense rain and storm surges drive water onto land – causing floods.

Answer 7

People
Flooding can damage property and infrastructure. It can also cause deaths to people by drowning.
Environment
Salt water from flooding can damage crops.

Question 8

Landslides
Rain can saturate mountains (relief) quickly and cause the soil to become heavy on steep slopes. This wet soil and rock can start to move downhill.

Answer 8

Environment
This causes large movements of mud and rocks which could block rivers.
People
Settlements at the bottom of a hill could be destroyed by fast-moving mud

Question 9

Economic reasons for vulnerability

Answer 9

· Access to accurate weather prediction technology

· Poverty (green penned it first I categorised it as social)

· Poor housing

· Coastal defences

Question 10

Social reasons for vulnerability

Answer 10

· Evacuation procedures (that have been practised)

· Disaster response teams.

Question 11

Environmental reasons for vulnerability

Answer 11

· Low-lying coastal regions

· Low relief (less steep hills/mountains)

Question 12

Bangladesh’s vulnerability

Answer 12

Physically vulnerable: as 80% of the land is less than 10m above sea level.​

Socially/economically vulnerable: as low GDP, 31% population live below the poverty line