Coastal Erosion

What is coastal erosion?

• Coastal erosion is caused by excessive vegetation growth along the coast.

• Coastal erosion is the process of the coastline wearing away due to natural forces like waves, currents, and tides.

• Coastal erosion is a result of volcanic activity near the coast.

• Coastal erosion is a man-made process to reshape the coastline.

List and explain the different types of coastal erosion.

• Dissolution, compaction, crystallization

• Traction, suspension, saltation

• Corrosion, deposition, weathering

• Hydraulic action, abrasion, attrition, and solution

How do waves contribute to coastal erosion?

• Waves transport sediment and cause abrasion, leading to the erosion of coastal landforms.

• Waves create new landforms and prevent erosion

• Waves reduce the impact of erosion by adding sediment

• Waves have no impact on coastal erosion

What role does climate change play in coastal erosion?

• Climate change reduces coastal erosion

• Climate change can exacerbate coastal erosion through rising sea levels and increased storm intensity.

• Climate change has no impact on coastal erosion

• Climate change causes coastal erosion to stop

Discuss the impact of human activities on coastal erosion.

• Coastal erosion is caused by natural processes only

• Human activities have no impact on coastal erosion

• Human activities such as construction, sand dredging, and vegetation removal disrupt natural coastal protection processes, leading to increased erosion rates.

• Human activities actually reduce coastal erosion rates

Explain the concept of beach nourishment and its role in combating coastal erosion.

• Beach nourishment involves adding sand or sediment to beaches to widen them and protect against erosion by providing a buffer against wave action.

• Beach nourishment refers to the process of removing sand from beaches to combat erosion.

• Beach nourishment is a term used to describe the construction of seawalls to protect beaches from erosion.

• Beach nourishment involves planting trees along the coast to prevent erosion.

What are some natural defenses against coastal erosion?

• Removing vegetation

• Dumping large rocks into the ocean

• Planting vegetation, constructing sand dunes, building seawalls, creating offshore breakwaters

• Constructing buildings on the beach

Describe the process of longshore drift and its effect on coastal erosion.

• Longshore drift is caused by volcanic activity

• Longshore drift results in the formation of new landmasses

• Longshore drift is the process of sediment being transported along a coast by waves, leading to coastal erosion due to the redistribution of material.

• Longshore drift is a man-made process

How does vegetation help prevent coastal erosion?

• Vegetation weakens the soil structure

• Vegetation increases the impact of strong winds and waves

• Vegetation stabilizes the soil with their roots, absorbs wave energy, and reduces the impact of strong winds and waves on the coastline.

• Vegetation attracts more erosion

Discuss the importance of coastal management strategies in mitigating coastal erosion.

• Coastal management strategies have no impact on coastal erosion

• Coastal management strategies play a crucial role in mitigating coastal erosion by stabilizing the coastline, absorbing wave energy, and promoting natural sediment deposition.

• Coastal erosion can be solved without any intervention

• Coastal management strategies accelerate coastal erosion