Post on 16-Feb-2016
description
River ThamesTerence Lam
Information of River ThamesLocation : southern EnglandLength : 346km (second longest in the United
Kingdom)Source :Thames HeadMouth :Thames Estuary, North SeaCities flow through : London , Windsor , OxfordAverage discharge : 65.8 m /s
3
Importance of River Thames provide habitation, water power,
food and waterInternational trade & cultural
canter -acted as a major highway
Thames Barrier
Information about Thames BarrierWorld's second-largest movable flood barrierBuilt across a 520-metre wide stretch of the
riverTotal construction cost: around £534 millionLocation: downstream of central London
Reasons for building Thames BarrierPrevent London from flooding - A storm surge generated by low pressure in the Atlantic Ocean sometimes tracks eastwards past the north of Scotland -may then be driven into the shallow waters of the North Sea. Rising of water levelsHistorical flooding - 1928 Thames flood
Design of Thames Barrierrotating gatesdivides the river into four 61 meter and two
about 30 meter navigable spansgates are hollowmade of steel (40 millimeters thick)20.1 meters high & weigh 3,700 tones (4
central gates)
Source:WikipediaBBC
The end