Chapter 1: Changing Landscapes Case Studies Flashcards
Case Studies Included: 1. Holderness Coastline 2. Sefton Dunes 3. Sundarbans
Where is Sefton located?
Between Liverpool and Stockport
Give 3 reasons why the Sefton Dunes were being eroded?
- Period storms which caused loosening soil
- Dredging of beach material
- Off-road vehicles
How were the Sefton Dunes protected from Dune Walkers?
Soft Engineering. Dunes were roped off to the public and footbridges were created around the dunes.
What other actions were implemented to limit the erosion of the Sefton Dunes?
- Planting of ‘Yews’ and ‘Marram Grass’ to strengthen the soil and compact it together
- Banning off-road vehicles
Why is coastal management needed along the Holderness coastline?
Chalk is made from the glacial till which makes it easily erodible.
There is a long fetch across the North Sea
What is located in Easington?
Gas Terminal
How much erosion is occurring yearly along the Holderness coastline due to sea level rise?
2m
Where are the 3 locations we study along the Holderness coastline?
Mapleton, Easington, Withersea
What management strategies are used in Mapleton to mitigate the challenges to the 50 properties?
Rock armour, groynes and cliff reprofiling
Which farm is located in Mapleton?
Cowden
Why were the use of Groynes in Easington controversial?
Whilst they were protecting the gas terminal which was powering the North, it stopped the growth of Spurn head spit- a SSSI. To mitigate this challenge it was agreed the groynes would last until the gas reserves were used up, and then removed to let the spit grow.
What does an SSSI stand for?
Site of Special Scientific Interest
How long is Spurn Head spit?
5.5km long
Why were the defences in Withersea causing other issues?
The groynes were just moving the erosion downstream away from the villages, causing extensive erosion.
How much do sea walls cost?
£5-10,000 per metre. They’re also unsightly to the public and need to be replaced every 20 years at least.
