Cliff Collapse (Barton-on-Sea, Hampshire, England) Flashcards

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1
Q

Where

A

Barton-on-sea, Christchurch Bay

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2
Q

Type

A

Rotational slip

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3
Q

Rock layers

A

Made of weak sand and clay so easily strode an collapse

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4
Q

Effect of tributaries

A

Water increases weight

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5
Q

Tourism effect

A

Unpleasant to visit

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6
Q

Building effects

A

Houses lost if near cliff edge

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7
Q

Wildlife effects

A

Natural wildlife destroyed

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8
Q

Economy effects

A

Expensive to replace costal defences

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9
Q

What has been lost to sea

A

A cafe in the past

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10
Q

Recent landslip and effects

A

2008 which raised concerns with locals of the vulnerability of the area

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11
Q

Baron Court location

A

20m from cliff edge

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12
Q

Local authorities predict

A

Houses of Baron Court will be lost within the next 10 to 20 years

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13
Q

Reasons for these cliffs being prone to collapse

A
  1. Rocks are weak sands and clays which are easily eroded
  2. Permeable rock lays on top of impermeable rock which causes water to ‘pond up’ between layers and makes rock heavier
  3. Area gets the prevailing south-westerly winds
  4. Several small streams run toward the coast but then disappear into permeable rock
  5. New buildings increase weight on rock and interfere with drainage
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