Severn
| Severn | ||
 River Severn catchment area |
||
| Data | ||
| location | South West England | |
| River system | Severn | |
| source | at Llanidloes in the Cambrian Mountains 52 ° 29 ′ 40 ″ N , 3 ° 44 ′ 15 ″ W |
|
| Source height | 610 m | |
| muzzle | In the Bristol Channel coordinates: 51 ° 34 ′ 50 ″ N , 2 ° 41 ′ 0 ″ W 51 ° 34 ′ 50 ″ N , 2 ° 41 ′ 0 ″ W. |
|
| Mouth height | 0 m | |
| Height difference | 610 m | |
| Bottom slope | 1.7 ‰ | |
| length | 354 km | |
| Catchment area | 11,420 km² | |
| Drain |
MQ |
61.17 m³ / s |
 The Severn Bridge on the border between England and Wales as seen from the English side. |
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The Severn [ ˈsɛvən ] ( River Severn , Welsh Afon Hafren , in ancient times Sabrina or Sabriana ) is the longest river in Great Britain with a length of 354 km . It rises near Llanidloes in central Wales in the Cambrian Mountains at an altitude of 610 m and flows through the English counties of Shropshire , Worcestershire and Gloucestershire . At its mouth, the Severn becomes the Bristol Channel on the Celtic Sea that separates Wales and England .
The Severn Tunnel of the Great Western Railway runs under the mouth of the Severn . The two motorway bridges over the estuary (opened in 1966 and 1996) connect Wales with the southern counties of England.
An almost ten-kilometer section of the river in Shropshire, the Ironbridge Gorge (Iron Bridge Gorge), in 1986 for World Heritage of UNESCO explained. This area was the center of early industrialization in England. The name Ironbridge comes from the iron bridge built in 1779, the first of its kind in the world. The Severn is connected at several points to the central English canal system, the narrowboat canals.
A special feature of the estuary, the Severn estuary , is the strong tidal range ( ebb and flow ). The difference is about 15 m; this is the second highest tidal difference in the world. At certain times the rising water is pushed up the river; the resulting tidal waves (called Severn Bore) are very popular with surfers . The largest tidal power station in the world was planned for the Severn estuary . However, after a feasibility study, the UK government did not pursue the project any further.
At the Severn is a main distribution area of the megalithic complexes of the Cotswold Severn tomb type.
See also
Web links
Individual evidence
- ↑ Ptolemy 2.3.3
- ^ Spiegel Online (from January 4, 2010)
- ^ Study (PDF) from the British National Archives
- ↑ Tidal power plants in Great Britain from Spiegel-Online , accessed on March 4, 2015.