1 / 10

River Thames

River Thames. Terence Lam. Information of River Thames. Location : southern England Length : 346 km (second longest in the United Kingdom) Source :Thames Head Mouth :Thames Estuary, North Sea Cities flow through : London , Windsor , Oxford

hija
Télécharger la présentation

River Thames

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. River Thames Terence Lam

  2. Information of River Thames • Location : southern England • Length : 346km (second longest in the United Kingdom) • Source :Thames Head • Mouth :Thames Estuary, North Sea • Cities flow through : London , Windsor , Oxford • Average discharge :65.8 m /s 3

  3. Importance of River Thames • provide habitation, water power, food and water • International trade & cultural canter -acted as a major highway

  4. Thames Barrier

  5. Information about Thames Barrier • World's second-largest movable flood barrier • Built across a 520-metre wide stretch of the river • Total construction cost: around £534 million • Location: downstream of central London

  6. Reasons for building Thames Barrier • Prevent 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 levels • Historical flooding - 1928 Thames flood

  7. Thames Barrier in action

  8. Design of Thames Barrier • rotating gates • divides the river into four 61 meter and two about 30 meter navigable spans • gates are hollow • made of steel (40 millimeters thick) • 20.1 meters high & weigh 3,700 tones (4 central gates)

  9. Source: Wikipedia BBC

  10. The end

More Related