Component 1 - Changing Physical and Human Landscapes Flashcards
What is the distribution of highland areas in the UK?
North England, Scotland and Wales
What is the distribution of lowland areas in the UK?
Southern England
What is a national park?
A protected area due to wildlife, heritage or beautiful countryside
What does AONB stand for?
Area of Outstanding Natural Beauty
How is the Brecon Beacons National Park managed?
- Footpaths repaired using stone
- Vegetation on pathways restored
How is the Gower managed?
- Information boards
- Clearly marked car parks
- Strict control over building
What are the impacts of human activity on Snowdonia?
- Souvenir shops instead of essential shops
- Welsh language diluted
- House prices increased
- More jobs
What does ‘carrying capacity’ mean?
The maximum population size that an environment can sustain
What limestone landscape have I studied?
Malham Cove, Yorkshire Dales
How is limestone formed?
Deposition of dead sea creatures built up in layers
What are horizontal cracks in rocks called?
Bedding planes
Is limestone a hard or soft rock?
Hard rock
Limestone is dissolved by…
Carbonic acid (acid rainwater)
Rectangular blocks on a limestone pavement are called
Clints
The gaps between these blocks on a limestone pavement are called…
Grykes
Stalactites are…
An icicle of calcium carbonate hanging from the ceiling of a limestone cavern
Stalagmites are…
Icicles made of calcium carbonate that grow up from the floor of a limestone cavern
What are the 5 key features of a drainage basin?
- Tributary
- Confluence
- Source
- Mouth
- Watershed
What three fluvial/water processes change rivers over time?
- Erosion
- Transportation
- Deposition
What are the four types of fluvial/water transportation?
- Solution
- Saltation
- Suspension
- Traction
What are the four types of fluvial/water erosion?
- Abrasion
- Attrition
- Hydraulic action
- Solution
What is a meander?
A bend in a river
Where is the fastest flow on a meander?
Outside
Where does deposition occur on a meander?
Inside - slower flow
Where is a river cliff likely to form on a meander?
Outside
Where is the hard rock located on a waterfall?
Top
Where is the soft rock located on a waterfall?
Bottom
How is a plunge pool formed?
Force of the water hitting the rocks (hydraulic action)
What is the ledge of hard rock called on a waterfall?
Overhang
When a waterfall retreats (goes backwards) if forms a…
Gorge
What named example of a waterfall have we studied?
Niagara Falls
What two ways have people used waterfalls?
- Hydroelectric power
- Tourism
What is the flat area next to a river called?
Floodplain
What is the Bluff line?
Edge of a floodplain
What is the key process that forms floodplain?
Deposition
TRUE OR FALSE: Levees are banks made of deposited material
True
TRUE OR FALSE: Levees are only naturally made
False
What word is used for water flowing over the surface of the land?
Overland flow
What word is used for water flowing into the soil?
Infiltration
What word is used when there is too much water in the soil and it cannot take anymore?
Saturation
Give the 4 natural causes of flooding
- Impermeable geology
- Heavy rainfall
- Prolonged rainfall
- Steep slopes (relief)
Give 2 man made (human) causes of flooding
- Deforestation
- Urbanisation
Give 5 causes of the Boscastle flooding
- High tide
- Steep valley sides > overland flow
- Impermeable surfaces > surface runoff
- Saturated ground (due to the storms days before)
- Confluence of the River Valency and River Jordan
Give 2 effects of the Boscastle flooding
- Roads blocked due to helicopters
- Properties destroyed
- Emergency accommodation
- Vehicles carried out to sea
- Insurance costs increased for homeowners
- Tourism industry seriously affected
What other example of river flooding did we study?
Somerset Levels (2014)
Give four causes of the Somerset Levels flooding
- Flat landscapes
- Levels
Name 3 hard engineering river management strategies
- Embankments
- Channelisation
- Dams
Name 3 soft engineering river management strategies
- Washlands
- Land use zoning
- Afforestation
The size and energy of a wave depends upon what 3 factors?
- The fetch
- The wind strength
- The length of time the wind has been blowing
What is it called when water washes up the beach?
Swash
What is it called when water washes back down the beach?
Backwash
What is a concordant coastline?
- Where the geology is parallel to the coastline
- It has one type of rock
What is a discordant coastline?
- Where the geology is 90° to the coastline
- It has different types of rock
What is unconsolidated rock?
Rock that is only loosely compacted and that is not properly glued together
What is longshore drift?
Sand / sediment moving along the beach
What is swash?
The movement of sand / sediment up the beach by the wave
What is backwash?
The movement of sand / sediment back down the beach by the wave
What are 5 features of destructive waves?
- Occur in storm conditions
- Have high energy
- Long fetch
- Responsible for erosion, - - Greater backwash than swash
What are 5 features of constructive waves?
- Occur in calm conditions
- Have low energy
- Transport material via LSD
- Responsible for deposition
- Greater swash than backwash
What 3 landforms are created by longshore drift?
- Spit
- Bar
- Tombolo
Why is cornwall more vulnerable to coastal erosion?
Destructive waves and long fetch (from America)
What is a storm surge?
A change in sea level caused by a storm
What causes a storm surge?
Low air pressure causes a bulge in the sea. Bulge is pushed forward by the wind
TRUE OR FALSE: If a storm surge happens during low tide coastal flooding is highly likely
True
What storm surge did we study?
December 2013
Why is the south east coast of the UK more vulnerable to storm surges?
- There is a funnel effect between the UK and Europe
- The North Sea comes through the funnel
What are 2 physical reasons why London is vulnerable to flooding?
- Storm surges
- The funnel effect between the UK and Europe
What are 2 human reasons why London is vulnerable to flooding?
- Large population
- Lots of buildings along the Thames
What is isostatic recovery?
The weight of the ice acted like a see-saw and pushed down Scotland and raised the South East. Now that the weight of the ice has gone, Scotland is rebounding and the South East sinking back down
How has London attempted to reduce the threat of flooding?
Thames barrier
Give 5 hard engineering strategies to manage the coast
- Groynes
- Rip rap
- Sea wall
- Revetments
- Offshore reef
Give 3 soft engineering strategies to manage the coast
- Managed retreat
- Beach replenishment
- Cliff regrading
What does ‘intertidal zone’ mean?
Part of the shoreline between the high and low tide
Is there a higher or lower amount of intertidal zones today than what there were in the past?
Lower
Where are salt marshes found?
Intertidal zones
Give two reasons why salt marshes are disappearing
- Farmland
- Sea erosion
Why are the salt marshes along the Essex and the Thames gateway being eroded?
Land is subsiding (sinking) due to isostatic recovery
What does managed realignment aim to do?
It aims to create a wider intertidal zone to act as natural stores of flood water during high tide
What managed realignment scheme did you study?
Medmerry, Sussex
When was the Medmerry Managed Realignment scheme completed?
2014
What happened to the coastline you studied due to this managed realignment?
The coastline is now a further 2m inland than what it was