The three principle marine processes that influence coasts are erosion, transportation and deposition.
What are 3 coastal landforms?
Coastal Landform Types
- Delta Landforms.
- Estuary Landforms.
- Lakeshore Landforms.
- Rocky Coast Landforms.
- Sandy Coast Landforms.
- Tropical Coast Landforms.
What are coastal processes?
coastal processes driven by winds, waves and currents began to sculpt the edges of the coastline. Rocks and cliffs were cut back, bays were carved out of soft rock, harbour entrances were straightened with bars and spits, and pieces of the coast were joined together with sand and gravel.
What are 3 causes of coastal erosion?
Coastal erosion may be caused by hydraulic action, abrasion, impact and corrosion by wind and water, and other forces, natural or unnatural.
What are the 5 main processes that control coasts?
There are five main processes which cause coastal erosion. These are corrasion, abrasion, hydraulic action, attrition and corrosion/solution. Corrasion is when waves pick up beach material (e.g. pebbles) and hurl them at the base of a cliff.
What are the 3 types of coastal erosion?
Erosion
- Hydraulic action – this is the sheer power of the waves as they smash against the cliff.
- Abrasion – this is when pebbles grind along a rock platform, much like sandpaper.
- Attrition – this is when rocks that the sea is carrying knock against each other.
What are the 4 types of coastal erosion?
Destructive waves erode through four main processes; Hydraulic Action, Compression, Abrasion and Attrition.
Why are coastal processes important?
Coastal processes shape the physical environment, providing habitat such as turtle or seabird nesting beaches, reefs, and mangrove forests or seagrass beds.
What causes coastal processes?
All coastlines are affected by storms and other natural events that cause erosion; the combination of storm surge at high tide with additional effects from strong waves—conditions commonly associated with landfalling tropical storms—creates the most damaging conditions.
What is the main process of coastal deposition?
When the sea loses energy, it drops the sand, rock particles and pebbles it has been carrying. This is called deposition. Deposition happens when the swash is stronger than the backwash and is associated with constructive waves.
What are the 4 coastal features?
Coasts have many different features, such as caves and cliffs, beaches and mudflats. Tides, waves, and water currents (flow) shape the land to form these coastal features. Some coasts are also changed by the flow of glaciers, which are huge rivers of ice, and lava from volcanoes.
What are the main coastal landforms?
There are two main types of coastal landforms- erosional coastal landforms and depositional coastal landforms.
What is the main source of coastal erosion?
Waves are the primary energy source that causes coastal erosion and climate change is impacting both sea level and storm intensity and frequency. Coastal erosion depends on the stability of shoreline sediments, the intensity and frequency of storm waves and the exposure of coastal lands.
What are the 4 methods of coastal transportation?
Traction – large material is rolled along the sea floor. Saltation – beach material is bounced along the sea floor. Suspension – beach material is suspended and carried by the waves. Solution – material is disolved and carried by the water.
Which 4 marine processes are at work on the coast?
There are four main processes of erosion along the coast. These are hydraulic action, abrasion and corrasion, attrition and solution.
What are the 5 kinds of coastal protection?
Coastal defences
- 3.1 Groynes.
- 3.2 Sea wall.
- 3.3 Revetments.
- 3.4 Breakwaters.
- 3.5 Gabions.
What are the 3 erosion processes?
Rainfall and surface runoff
Splash erosion is generally seen as the first and least severe stage in the soil erosion process, which is followed by sheet erosion, then rill erosion and finally gully erosion (the most severe of the four).
What are 3 types of coastal protection?
Types of Coastal Protection Structures
- Seawalls.
- Bulkheads.
- Groins.
- Jetties.
- Breakwaters.
What are the 3 landforms of erosion?
Landforms of erosional coasts
- Sea cliffs. The most widespread landforms of erosional coasts are sea cliffs.
- Wave-cut platforms. At the base of most cliffs along a rocky coast one finds a flat surface at about the mid-tide elevation.
- Sea stacks.
- Sea arches.
How many types of coastal are there?
Here’s a deeper dive into four types of coastal habitat: mangroves, salt marshes, seagrass meadows, and coral reefs.
How many types of coasts are there?
There are 5 main types of coasts defined by the angle of incidence of the prevailing waves.