Theme 2
- Created by: kathskinner
- Created on: 31-10-16 19:37
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- Theme 2
- Processes Along a River
- Hydraulic Action
- This process involves the fore of water against the bed and banks
- Abraision
- This is the process by which the bed and banks are worn down by the rivers load.
- Attrition
- Material carried by the river bump into each other.
- Corrosion
- This is the chemical action of river water. The acids in the water dissolve the bed and banks.
- Hydraulic Action
- Features Along a River
- Soft Rock
- This is easiest to erode.
- Plunge Pool
- This is where the water rushes over and erodes the soft rock.
- Ledge Undercut
- The ledge collapses into the plunge pool.
- Soft Rock
- Managing Floods
- Hard Engineering
- These techniques are structures that are imposed on the land.
- Dams
- Barrier
- Flood Walls
- These techniques are structures that are imposed on the land.
- Soft Engineering
- These are techniques that work with the environment.
- Afforestation
- Channelisation
- Washlands
- These are techniques that work with the environment.
- Hard Engineering
- Coastal Features
- Swash
- The rush of seawater up the beach after the breaking wave
- Backwash
- The motion of receding waves- always at a right angle to the beach.
- Fetch
- The distance over which the wind has blown.
- Waves
- The result of the wind blowing over the sea. As they approach land they break.
- Constructive waves have a strong swash and a weak backwash.
- Destructive waves have a weak swash and a strong backwash.
- The result of the wind blowing over the sea. As they approach land they break.
- Swash
- Weather
- Rain
- Convectional is caused by the sun, frontal is caused by cold and warm air contacting and relief is due to barriers such as hills.
- In all types of rainfall, the warm air rises, cools and condenses, turns back into water vapour and precipitation occurs.
- Depressions are low pressure weather systems.
- Hurricanes, Cyclones and typhoons are caused by warm air travelling up into the storm meeting with light winds from the outside. This creates and cycle of high wind.
- Desertification
- Desertification is when the climate of a dry region becomes even drier. Vegetation dies or is eaten by grazing animals and the soil becomes vulnerable to soil erosion.
- Rain
- Processes Along a River
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