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Facts About Thames Barrier



                                   

The Thames Barrier which was built in 1984, protects Central London from tidal surges in the North Sea.                        

                               

It protects 125 sq km or 48 sqm of Central London. The Thames barrier was built, because of the Thames flood in 1928. The Thames river flooding destroyed lots of properties and 14 people lost their lives in the flood. So, the Environmental Agency came up with the idea of the Thames Barrier and its construction started in 1974. It is predicted that even with heavy rainfall and rising tides due to climate change it will still be able to protect London from flooding until 2070.

There are three positions of the Thames Barrier to let the river water flow in a controlled amount.

                                       


1- The "Underspill position", of the barrier allows a controlled amount of water to go under the barrier, this position is used when tides get too high and there is a danger to the gates.

2- The "Closed position", of the barrier is for stopping the flow of the river water when its high tide conditions.



3-The "Open position", of the barrier is used in normal conditions, to allow boats and ships to pass through.
                                     
                                             

The Thames Barrier comprises of 10 steel gates, it reaches 1,700 ft across the Thames river. By using hydraulic arms, it opens and closes the gates. It takes 75-90 minutes for the Thames Barrier to close completely.
                                     
                               
 

In future, Thames barrier would incorporate the Hydropower turbines, for generating
renewable energy.

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