Holderness - The Places Affected Flashcards
What rock is Flamborough made up of?
Resistant rock that provides examples of erosional features - caves, arches, stacks.
Chalk formed a headland.
Where is Mappleton located?
3km south of Hornsea.
How much erosion is Mappleton subject to?
2.0m per year.
Access road only 50m away from cliff edge.
Supporting 50 properties.
What does Mappleton lie upon?
Unconsolidated glacial till - boulder clay.
What is Mappleton a case study for?
An attempt at coastal management.
So, what was done at Mappleton to decrease erosion?
1991, 2 rock groynes and a rock revetment made from huge blocks of Scandinavian rocks were built.
At Mappleton, what happened when the 2 rock groynes and revetment was put in place?
Substantial beach accumulated between groynes halting erosion.
However, further south rate of erosion increased significantly.
Because material being carried south is not being replaced as its trapped within the groynes.
Therefore there is no beach to protect cliffs even during a neap tide the sea reaches base of soft cliffs - erosion.
Northern section at Mappleton=
Defences.
Beach built up.
Cliffs stable.
Southern section at Mappleton=
No defences.
Beach erosion.
Retreating.
Where is Aldbrough located?
Small settlement located south of Mappleton.
What is difference between Mappleton and Aldbrough?
Mappleton has sea defences built.
Aldbrough has none - erosion.
What do locals think about Aldbrough’s erosion?
That sea defences in Mappleton have made things worse.
What have been implemented at Withernsea because of the area attracting so many tourists?
Substantial sea defences to maintain beach.
Name 3 sea defences at Withernsea?
Sea wall.
Rock armour.
Groynes.
What has happened to Kilnsea?
Old settlement has been lost.
Sea defences built here in early 1900s to protect Godwin Battery.
Sea defences now crumbling and erosion increasing.
