Cliff Collapse (Barton-on-Sea, Hampshire, England) Flashcards
1
Q
Where
A
Barton-on-sea, Christchurch Bay
2
Q
Type
A
Rotational slip
3
Q
Rock layers
A
Made of weak sand and clay so easily strode an collapse
4
Q
Effect of tributaries
A
Water increases weight
5
Q
Tourism effect
A
Unpleasant to visit
6
Q
Building effects
A
Houses lost if near cliff edge
7
Q
Wildlife effects
A
Natural wildlife destroyed
8
Q
Economy effects
A
Expensive to replace costal defences
9
Q
What has been lost to sea
A
A cafe in the past
10
Q
Recent landslip and effects
A
2008 which raised concerns with locals of the vulnerability of the area
11
Q
Baron Court location
A
20m from cliff edge
12
Q
Local authorities predict
A
Houses of Baron Court will be lost within the next 10 to 20 years
13
Q
Reasons for these cliffs being prone to collapse
A
- Rocks are weak sands and clays which are easily eroded
- Permeable rock lays on top of impermeable rock which causes water to ‘pond up’ between layers and makes rock heavier
- Area gets the prevailing south-westerly winds
- Several small streams run toward the coast but then disappear into permeable rock
- New buildings increase weight on rock and interfere with drainage
