Shoreline Erosion and Protection Concepts

The video explores shoreline processes and features, focusing on forces like wave impact, abrasion, and refraction that shape shorelines through erosion and deposition. It describes features such as cliffs, sea arches, sea stacks, spits, sandbars, and tombolos. The video concludes with methods to stabilize shorelines, including protective structures and beach nourishment.

What happens during wave refraction?

• Waves bend around obstacles

• Waves increase in speed

• Waves decrease in height

• Waves stop moving

What is the effect of longshore transport on shorelines?

• It creates new islands

• It increases wave height

• It causes sediment to move along the coast

• It stops erosion

What is the primary force that causes weathering and erosion on shorelines?

• Tidal forces

• Rainfall

• Wave impact

• Wind impact

How does abrasion contribute to shoreline erosion?

• By dissolving rocks

• By grinding away materials with sediment

• By freezing and thawing

• By chemical reactions

Which feature is formed when a sea arch collapses?

• A lagoon

• A tombolo

• A sea stack

• A spit

What is a spit in terms of shoreline features?

• A rocky cliff

• A deep underwater trench

• A type of sea arch

• A narrow landform that extends into the water

How is a tombolo formed?

• By deposition connecting an island to the shore

• By tectonic movements

• By erosion of a cliff

• By volcanic activity

What is the purpose of a breakwater?

• To create new land

• To protect the shoreline by breaking waves

• To increase wave energy

• To remove sediment from the beach

What is beach nourishment?

• Adding sand to a beach to combat erosion

• Building a seawall

• Removing sand from a beach

• Planting vegetation on dunes

Which structure is typically built to protect harbor entrances?

• Groin

• Jetty

• Seawall

• Breakwater