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What are sub-aerial processes?

What are sub-aerial processes?

Sub-aerial processes refer to the processes of weathering and mass movement. Weathering is the breaking down of rock in situ. It can be divided into mechanical and chemical weathering. Mechanical weathering refers to physical processes like freeze-thaw action and biological weathering.

What are the causes and effects of coastal erosion?

Coastal erosion is a result of human activities and natural environment changes making the coastal dynamic action (wave, current, wind) lose balance in the coastal process, and the long-term loss of sediments of coastal zone results in the destruction process of coastline retreat and beach erosion.

What are the effect of coastal erosion?

Coastal Erosion

Factor Effect Time Scale
Rip currents Erosion Hours to months
Underflow Erosion Hours to days
Inlet presence Net erosion; high instability Years to centuries
Overwash Erosional Hours to days

Why are sub-aerial processes important?

Sub-aerial processes include weathering and mass movement. These processes operate on the cliff face to weaken it and provide material for coastal erosion.

How do bedding planes affect erosion?

The angle the beds dip at affects how they are eroded and the profile of the resulting cliffs. Beds that dip seaward produce gentler cliffs but are less stable because loose material can slide down the bedding planes in mass movements. Landward dipping beds produce stabler & steeper cliffs.

What is marine and coastal processes and their effects?

The coastal zone is that part of the land surface influenced by marine processes. The atmospheric processes include temperature, precipitation, and winds, while the major marine processes are waves and tides, together with water temperature and salinity.

How are beaches affected by weathering and erosion?

Most beach materials are the products of weathering and erosion. Over many years, water and wind wear away at the land. Tides and currents are the main way beaches are created, changed, and even destroyed, as the currents move sediment and debris from one place to another. Beaches are constantly changing.

How is the shoreline affected by coastal processes?

The shoreline is affected by waves (produced by wind at sea) and tides (produced by the gravitational effect of the moon and sun). Waves are caused by wind. The greater the wind speed the larger the waves. …

How do Subaerial processes affect erosion?

What role does sub-aerial processes perform with coastal recession?

Subaerial processes (weathering and mass movement) work together to influence rates of coastal recession. Weathering weakens rocks above high tide mark, making mass movement easier by reducing the internal cohesion of the rock. Repeated mass movement leads to rapid coastal recession.

What are sub-aerial processes and why are they important?

Sub-aerial processes are land based processes which alter the shape of a coastline. They’re a combination of both weathering and mass movement.

What is sub-aerial process?

Sub-aerial process are land-based processes which alter the shape of the coastline. These are a combination of weathering and mass movement. Weathering is the decay and disintegration of rock in situ.

What is the difference between run-off and sub-aerial?

Run-off can move excellent material downslope, especially where the overland stream happens as a thin, persistent layer (sheet stream) and washes sediment and mud estimated particles. Sub-aerial procedures are land-based procedures that modify the state of a coastline. They are a mix of both weathering and mass development.

How do sub-aerial processes affect a cliff face?

Sub-aerial processes include weathering and mass movement. These processes operate on the cliff face to weaken it and provide material for coastal erosion. 1 Vegetation can protect the cliff face but its roots can also grow into cracks and widen them.