Tidal Activity
Depending on the time of year, the river tide rises and falls twice a day by up to 7 m (24 ft) and takes longer to flow out (6–9 hours) than it does to flow in (4–5 hours).
London Bridge is used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than London Bridge, and Teddington about an hour later.
Parts of London are vulnerable to flooding by storm surges. The threat has increased over time due to a slow but continuous rise in high water level, caused by both the extremely slow 'tilting' of Britain (up in the north and down in the south) caused by post-glacial rebound and the gradual rise in sea levels due to climate change. The Thames Barrier was constructed across the Thames at Woolwich to deal with this threat.
Read more about this topic: Tideway
Famous quotes containing the words tidal and/or activity:
“And now it is once more the tidal wave
That when it was swept by, leaves summits stained.
Oh, blood will out. It cannot be contained.”
—Robert Frost (1874–1963)
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—Mary McCarthy (1912–1989)