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1857951
Coast management
Descrição
Mapa Mental sobre Coast management, criado por [MABE]Matej179 em 12-01-2015.
Sem etiquetas
nature
coasts
ecology
coast management
shore
shores
Mapa Mental por
[MABE]Matej179
, atualizado more than 1 year ago
Mais
Menos
Criado por
[MABE]Matej179
mais de 9 anos atrás
17
0
0
Resumo de Recurso
Coast management
Soft engineering
Beach nourishing: sand transported to repair LSD.
Strengths: has a natural look.
Weaknesses: costly and may erode again.
Do nothing: land is no longer worth defending.
Strengths: free.
Weaknesses: problems could get worse.
Red lining or zone management: preventing further building on endangered land.
Strengths: saves money long term.
Weaknesses: unpopular and politically challenging.
Sustainable management.
Managed retreat: incentives given through grants/buyouts to encourage re- location and ‘set-back’ schemes.
Strengths: saves construction costs.
Weaknesses: difficult to argue and persuade politically if residents are involved in the relocation.
Coastal resilience: allowing flooding and other phenomenons can have positive ecological outcomes.
Strengths: very cost effective and ecologically helpful.
Weaknesses: loss of agriculturally valuable land can lead to large scale losses.
Shoreline management plans: getting local groups to work together towards a solution.
Strengths: solution matches specific needs of the locals.
Weaknesses: those who want immediate action can view this as a delaying tactic.
Hard engineering
Cliff-foot strategies
Sea walls: a large wall built to absorb energy from waves.
Strenghts: traditional method.
Weaknesses: very costly and quite ineffective for built beaches and LSD locations
Revetments: a wall that is built to reflect wave energy.
Strengths: also traditional but cheaper than sea walls.
Weaknesses: costly and ineffective with very strong waves.
Gabions: wire cages that hold rocks for coastal defences.
Strenghts: even cheaper than revetments.
Weaknesses: also costly and only a small scale solution.
Groynes: barricades made of wood or rock to prevent LSD.
Strengths: quite cheap and can be easily repaired.
Weaknesses: require maintenance and can cause more problems down shore.
Offshore bars: built offshore to reduce incoming wave strength.
Strenghts: can be built out of waste and mimic nature.
Weaknesses: ecological impacts may not work that well.
Rip-rap: large boulders at the shore to reduce damage to sea walls and shorelines.
Strenghts: effective for preventing large scale erosion.
Weaknesses: became quite costly and may move with severe weather.
Cliff face strategies:
Cliff drainage: removes water to prevent landslides.
Strenghts: cost effective.
Weaknesses: dry cliffs can lead to collapse.
Cliff regrading: lowering the angle of cliffs to achieve higher ground stability.
Weaknesses: retreat of cliff can affect valuable land.
Strenghts: works on some types of rocks where nothing else will.
Anexos de mídia
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