This image shows the Thames Flood Barrier which is located just outside central London. However after the 2007 flood, experts fear that by 2030 the current barrier could be unable to cope. There has been talk of building a new Barrier in 2030 which will be able to cope with floods to come. On BBS news it gives some details, "A £20bn new Thames barrier could be built to prevent potentially disastrous flooding in London".
This image is evidence that in 20 years the Barrier willbe unable to cope. As you can seein the picture, the water levels are very high, and with the Thames estuary being one of the Biggest in Britain, there i fear that with rising water levels, the barrier wouldn't be very effective so a bigger barrier would need to be built.
This is a link to BBC news that has a video which shows us hpw the barrier works.
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