Intertidal Zone & Coastal Management Flashcards
What do we mean by intertidal zone?
The space between high tide and low tide
What has happened to the number of intertidal zones ?
They have decreased
Where are salt marshes found?
In the intertidal zone
Give two reasons why salt marshes are disappearing.
- Farmland
2. 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 in Sussex.
When was the managed realignment scheme that you studied 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.
What is a shoreline management plan?
it is a plan councils create to state what they are going to do with the coastline.
What three things do councils have to consider when creating a shoreline management plan?
- Impacts coastal defences would have on other locations
- Impacts of coastal defences on animal habitats and the environment
- Costs and Benefits of the scheme.
What are the 4 different types of shoreline management?
- Hold the line
- Advance the line
- Managed retreat (retreat the line)
- Do nothing.
What shoreline management plan does Sea Palling have?
Hold the line
.What shoreline management plan does Happisburgh have?
Managed retreat (Retreat the line.)
Why is coastal hazard mapping good?
- Gives warnings
- People know what places will be affected
- allows emergency services to plan
- plan building.
