Quote:
Originally Posted by Neil
Won't those streets have to be below the level of the Thames for that to happen so likely to flood anyway?
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Maybe not. Near where I once lived there was a 'storm drain' which emptied into a local river estuary at below the level of the high tide. The drain was fitted with a one way valve to prevent the river feeding into the drain and also a large underground storage tank for water that could not be discharged when the tide was in. When this system was overloaded it used to blow off a manhole cover and produce a fountain which could be as much as six feet high. All this in the middle of an important road which would then flood and then have to be closed.