IB Geography Topic B.2.4 Sand Dune Development Revision Notes (SL/HL)

IB Geography Topic B.2.4 Sand Dune Development Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Interactions Between Wind, Vegetation, and Sediment

Imagine standing on a beach, feeling the wind whip grains of sand across your feet.
Over time, these grains accumulate, forming towering sand dunes.
But how do these dunes stay in place, resisting the relentless forces of wind and waves?

Note

Sand dunes are dynamic coastal features shaped by the interplay of wind, vegetation, and sediment.

How Wind Transports and Deposits Sand

Wind is a powerful force in coastal environments, capable of transporting and depositing sand to create dunes.
This process involves three key steps:
1. Erosion: Wind picks up loose sand from the beach.
2. Transportation: Sand is carried inland by the wind.
3. Deposition: Sand settles when the wind slows down or encounters an obstacle.

Example

Think of a beach on a windy day.
As the wind blows, it lifts sand particles into the air.
These particles are carried until the wind loses energy or hits an obstacle, like a rock or a clump of vegetation, causing the sand to drop and accumulate.

Why Dunes Form

Sand dunes form when:
1. Strong winds blow consistently from one direction.
2. Dry, loose sand is available for transport.
3. Obstacles like vegetation or debris slow the wind, causing sand to settle.

Tip

To remember the process of dune formation, think of the acronym ETD: Erosion, Transportation, Deposition.

The Role of Vegetation in Stabilizing Dunes

Vegetation plays a critical role in stabilizing sand dunes by:

Nice try, unfortunately this paywall isn't as easy to bypass as you think. Want to help devleop the site? Join the team at https://revisiondojo.com/join-us. exercitation voluptate cillum ullamco excepteur sint officia do tempor Lorem irure minim Lorem elit id voluptate reprehenderit voluptate laboris in nostrud qui non Lorem nostrud laborum culpa sit occaecat reprehenderit

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit.

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

Unlock the rest of this chapter with a free account

Interactions Between Wind, Vegetation, and Sediment

Imagine standing on a beach, feeling the wind whip grains of sand across your feet.
Over time, these grains accumulate, forming towering sand dunes.
But how do these dunes stay in place, resisting the relentless forces of wind and waves?

Note

Sand dunes are dynamic coastal features shaped by the interplay of wind, vegetation, and sediment.

How Wind Transports and Deposits Sand

Wind is a powerful force in coastal environments, capable of transporting and depositing sand to create dunes.
This process involves three key steps:
1. Erosion: Wind picks up loose sand from the beach.
2. Transportation: Sand is carried inland by the wind.
3. Deposition: Sand settles when the wind slows down or encounters an obstacle.

Example

Think of a beach on a windy day.
As the wind blows, it lifts sand particles into the air.
These particles are carried until the wind loses energy or hits an obstacle, like a rock or a clump of vegetation, causing the sand to drop and accumulate.

Why Dunes Form

Sand dunes form when:
1. Strong winds blow consistently from one direction.
2. Dry, loose sand is available for transport.
3. Obstacles like vegetation or debris slow the wind, causing sand to settle.

Tip

To remember the process of dune formation, think of the acronym ETD: Erosion, Transportation, Deposition.

The Role of Vegetation in Stabilizing Dunes

Vegetation plays a critical role in stabilizing sand dunes by:

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

1 Changing Population3 subtopics

2 Global Climate - Vulnerability and Resilience3 subtopics

3 Global Resource Consumption and Security3 subtopics

4 Power, Places and Networks (HL only)3 subtopics

5 Human Development and Diversity (HL only)3 subtopics

6 Global Risks and Resilience (HL only)3 subtopics

Option A Freshwater - Drainage Basins4 subtopics

Option B Oceans and Coastal Margins4 subtopics

Option C Extreme Environments4 subtopics

Option D Geophysical Hazards4 subtopics

Option E Leisure, Tourism and Sport4 subtopics

Option F The Geography of Food and Health4 subtopics

Option G Urban Environments5 subtopics

IB Geography B.2.4 Sand Dune Development Notes

1 Changing Population3 subtopics

2 Global Climate - Vulnerability and Resilience3 subtopics

3 Global Resource Consumption and Security3 subtopics

4 Power, Places and Networks (HL only)3 subtopics

5 Human Development and Diversity (HL only)3 subtopics

6 Global Risks and Resilience (HL only)3 subtopics

Option A Freshwater - Drainage Basins4 subtopics

Option B Oceans and Coastal Margins4 subtopics

Option C Extreme Environments4 subtopics

Option D Geophysical Hazards4 subtopics

Option E Leisure, Tourism and Sport4 subtopics

Option F The Geography of Food and Health4 subtopics

Option G Urban Environments5 subtopics

Interactions Between Wind, Vegetation, and Sediment

How Wind Transports and Deposits Sand

Why Dunes Form

The Role of Vegetation in Stabilizing Dunes

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Interactions Between Wind, Vegetation, and Sediment

How Wind Transports and Deposits Sand

Why Dunes Form

The Role of Vegetation in Stabilizing Dunes

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account