Kirabati & Management strategies Flashcards
How many low lying atolls are there in the pacific?
33
How high is the highest part?
4 metres
What % of the coastline lives within 1 km of the coast?
100%
What are some of the impacts of sea level rise on Kirabati?
Separation of people 200 houses lost Habitat loss Agriculture Separation of people
What is the method called ‘migration with dignity’?
Some of the population are being sent to Australia and New Zealand to learn work skills so they are prepared for life if they have to migrate permanently.
What sea defence technique are the locals building?
Sea walls
What is being planted to try and reduce the risk of flooding?
Mangroves
What does the UNEP say about how many cities are next to the coast?
3/4
What (rough) % of the worlds population lives with in 60 km of the coast according to the UNEP?
50
What are the physical factors that affect flooding risks?
Presence of a beach, shingle How accessible the location is The geology If there is any processes such as longshore drift occurring Is the coastline high or low energy
What are the human factors that affect the risk of flooding?
Economic activity, is it worth the money to put preventatives in place.
The level of development of the area.
Cultural value
Economic and environmental value
What does it mean to ‘hold the line’ ?
Retain existing coastline by maintaining current defences.
Used on high value coastline
Usually high engineering
What is managed retreat?
Moving defences inland in a controlled way
Allow previously defended areas to flood
What does advance the line mean?
To build new defences seaward of current coastline
Rare in the UK
Reduces stress on the existing defences
What is no active interaction?
Letting nature take its course
Low value coastline
What are shoreline management plans?
Provides an assessment of risks to people and evolution of the coast
22 across the UK
Provides framework to address the risk to the environment and people
Promotes long term management
What are sea walls?
Stone or concrete walls at the foot of a cliff or top of a beach ro reflect waves back into the sea
Around £6000/m
BRIGHTON
What is revetments?
Sloping, wooden or rock structures placed at the foot of a cliff or top of a beach to break up wave energy
£4500/m
Low level maintenance
What is rock armour?
Large rocks placed at top of beaches or bottoms of cliffs
£1000/3500/m
Permeable barrier to there sea, breaks up waves but allows some water through.
What is an offshore reef?
A partly submerged rock barrier designed to break up waves before they reach the coast
£1000/3500
Permeable surface
What is beach nourishment?
The addition of sand or shingles to an existing beach usually dredged from the nearby seabed.
£3000/m
What is dune regeneration?
Marram grass is planted to stabilise dunes
areas can be fenced off to keep people away from plants and dunes
£2/20/m
