GCSE Geography

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Author:
ghoran
ID:
156003
Filename:
GCSE Geography
Updated:
2012-05-28 03:37:53
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London Thames estuary case study
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revision
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  1. The lower Thames estuary including centeral London is vulnerable to
    flooding
  2. what was done to stop the lower Thames estuary flooding
    the Thame barrier was built
  3. the Thames barrier was built for a number of reasons . When a storm surges coincidde with high spring tides , dangerously high water levels can occur in the Thames estuary . The old , poorly maintained :
    sea defences that existed in the Thames estuary in 1953 were no match for the power surges and they collapsed , causing flooding
  4. the Thames barrier was built for a number of reasons . One reason is because the river banks are lined with a mixture of
    modern office buildings , recently built and converted residential appartrments and remnants of London's long history such as the Tower of London and St Paul's Cathedral . Even the Houses of Parliament , the seat of the political power in the UK , has a riverside loaction
  5. The Thames Barrier was created for a number of reasons . One reason is that if London flooded it would be a ..... .... .... . It would lead to social distress on a scale not seen in other UK towns and cities flooded in recent years . Political paralysis and panic would be likely results . ......... million commuters work in Thames-side locations . property assests are estimated at around ...... billion . there are ...... tube stations , ...... schools and ..... hospitals in the zone and infrastructure value is too high to calculate
    • finacial disaster zone
    • 1.5
    • 100
    • 69
    • 400
    • 16
  6. when was the Thames barrier constructed
    between 1974 and 1984
  7. How much did the Thames barrier cost
    • £534 million
    • £1.6 billion at todays prices
  8. was the Thames barrier worth it
    • the barrier is rasied on average 4-6 times a year , but with increasing frequency
    • it was closed twice in one day when a storm surge similar to the one in 1953 occured
    • up to 2007 it has been closed more than 100 times
    • it is estimated to cope with current revised estimates for sea level rises until 2030-50
    • it has been suggested that a 16km wide barrier across the river sheernes in kent and southend essex may soon be needed
  9. what are the reasons for rising sea levels
    • thermal expansion
    • polar ice caps and mountian glaciers melting
    • isostatic rebound
  10. what does thermal expansion mean
    the sea levels are rising because the sea absorbs more heat from our atmosphere which is getting hotter due to global warming
  11. what does isostatic rebound mean
    the south coast of England is sinking back into the mantle as the weight of of the ice from the last ice age which covered Scotland is released once the ice melts meaning the level of the sea rises as the land sinks

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