To stop the flood tide from coming upstream and flooding London
The Thames Barrier is a flood prevention barrier on the river Thames east of London. Its purpose is to prevent London flooding at times of exceptionally high tides.
The Thames Flood Barrier was ready for use in May 1984.
The Thames can flood, but the waters are contained by the Flood Barrier at Woolwich
There are no dams on the river Thames.Unless you are referring to the Thames Flood Barrier.This is downstream of central London, and it is a closeable barrier designed to hold back the sea when storms threaten to flood London.
because its tidal
The Thames...
They are along the thames. The Thames Barrier at Greenwich.
Thames
The Thames Flood Barrier is a structure which normally lies on the bed of the river downstream from central London which can be raised when an exceptionally high tide is expected, thereby preventing London from flooding.
The Thames Barrier
None. There is a tidal barrier, east of London for flood prevention and several weirs, but no dams.
About 170 miles.