Geography SL
Geography SL
10
Chapters
152
Notes
Option A - Freshwater – Drainage basins
Option A - Freshwater – Drainage basins
Option B - Oceans & coastal margins
Option B - Oceans & coastal margins
Option C - Extreme Environments
Option C - Extreme Environments
Option D - Geophysical Hazards
Option D - Geophysical Hazards
Option E - Leisure, Tourism And Sport
Option E - Leisure, Tourism And Sport
Option F - The Geography Of Food & Health
Option F - The Geography Of Food & Health
Option G - Urban Environments
Option G - Urban Environments
Unit 1 - Changing Population
Unit 1 - Changing Population
Unit 2 - Global Climate - Vulnerability & Resilience
Unit 2 - Global Climate - Vulnerability & Resilience
Unit 3 - Global Resource Consumption & Security
Unit 3 - Global Resource Consumption & Security
IB Resources
Option F - The Geography Of Food & Health
Geography SL
Geography SL

Option F - The Geography Of Food & Health

Unveiling Hägerstrand's Pioneering Model & Disease Diffusion Patterns

Word Count Emoji
719 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 16th Oct 2024

Table of content

Hägerstrand’s diffusion curve

Hägerstrand's diffusion curve is a model created by Swedish geographer Torsten Hägerstrand to study the spread of innovations. Key points:

 

This model factors in elements such as information regarding innovations, financial security, the psychological make-up of the adopter, and physical proximity to other adopters.

Disease diffusion

Disease diffusion refers to how diseases spread into new locations. Main points:

 

Disease spread usually follows a "wave" pattern, spreading out from a central source. There are four main patterns of disease diffusion: Expansion, Relocation, Contagious, Hierarchical, along with Network and Mixed diffusion. Physical and economic barriers, as well as political boundaries, can limit disease spread. The spread of disease can be visualized as an S-shaped curve with four phases: Infusion, Inflection, Saturation, and Waning.

The Zika virus

Zika virus arrived in Brazil in 2014 and has since spread to 21 other countries in the Americas.

 

The virus is primarily mosquito-borne but can also be transmitted through sexual contact. It causes mild symptoms in most infected people, but it can cause birth defects in children and neurological problems in adults.

 

The spread of Zika is an example of relocation diffusion as people traveled to and from affected areas, unknowingly transporting the virus.

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IB Resources
Option F - The Geography Of Food & Health
Geography SL
Geography SL

Option F - The Geography Of Food & Health

Unveiling Hägerstrand's Pioneering Model & Disease Diffusion Patterns

Word Count Emoji
719 words
Reading Time Emoji
4 mins read
Updated at Emoji
Last edited on 16th Oct 2024

Table of content

Hägerstrand’s diffusion curve

Hägerstrand's diffusion curve is a model created by Swedish geographer Torsten Hägerstrand to study the spread of innovations. Key points:

 

This model factors in elements such as information regarding innovations, financial security, the psychological make-up of the adopter, and physical proximity to other adopters.

Disease diffusion

Disease diffusion refers to how diseases spread into new locations. Main points:

 

Disease spread usually follows a "wave" pattern, spreading out from a central source. There are four main patterns of disease diffusion: Expansion, Relocation, Contagious, Hierarchical, along with Network and Mixed diffusion. Physical and economic barriers, as well as political boundaries, can limit disease spread. The spread of disease can be visualized as an S-shaped curve with four phases: Infusion, Inflection, Saturation, and Waning.

The Zika virus

Zika virus arrived in Brazil in 2014 and has since spread to 21 other countries in the Americas.

 

The virus is primarily mosquito-borne but can also be transmitted through sexual contact. It causes mild symptoms in most infected people, but it can cause birth defects in children and neurological problems in adults.

 

The spread of Zika is an example of relocation diffusion as people traveled to and from affected areas, unknowingly transporting the virus.

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Geography SL. Subscribe now and get closer to that 45 🌟