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Source page: |
http://commons.wikimedia.org/wiki/File:Fosse-Dionne-a-Tonnerre-DSC.jpg |
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Summaryedit
Description |
Français : La fosse Dionne au coeur de la ville de Tonnerre (France) est une source de type exsurgence qui restitue l'eau stockée dans le plateau karstique qui domine la ville. Le réseau de galeries qui l'alimente débute à plus de 40 km de la source. La fosse Dionne est à l'origine de la ville. Un lavoir a été aménagé au 18ème siècle autour de la source. Le débit relativement constant est d'environ 200 litres/secondes mais peut atteindre plusieurs m3/s en période de crue. L'eau arrive par une gallerie noyée qui a été explorée sur une longueur de 370 mètres et jusqu'à une profondeur de 70 mètres mais la poursuite de son exploration est rendue dangereuse notamment par des passages très étroits et est très réglementée depuis le décès de 3 plongeurs.
English: La Fosse Dionne is one of the largest spring in France situated in the center of the town of Tonnerre (Burgundy, France) at the base of a limestone plateau. The town was created around the spring. In 1758 the spring pool was converted into a lavoir with a semi-circular enclosure and a hierarchy of water channels. La Fosse Dionne's annual average flow is 200 liters/s ( 66 gallons per second) . The subterrean cave departing from the spring has been explored to a depth of 200′ deep and a lateral displacement of 1,180′ within underground limestone faults and clay membranes. Exploration is now reglemented since three divers have died.
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Date | |
Source | Own work |
Author | Pline |
Licensingedit
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This image has been assessed using the Quality image guidelines and is considered a Quality image. |
EXIF data: | |
File name | fosse-dionne-a-tonnerre-dsc.jpg |
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Size, Mbytes | 6.68356640625 |
Mime type | image/jpeg |
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