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Fosse Dionne
The Fosse Dionne is a karst spring,''Ville de Tonnerre - Guide touristique du patrimoine'', édité par l'Office de tourisme, 2012 in Tonnerre in the Yonne department of France. It is fed by the rainwater on the surrounding hills as well by at least one subterranean river. The Fosse Dionne is remarkable because of its average daily outflow of 311 litres per second. It is likely that the spring was the reason for the siting of the village. An elaborate ''lavoir'' was built around the spring in the 18th century. Hydrogeology The Fosse Dionne is a hydrogeological focal point and resurgent spring. It is fed mainly by the rainwater entering the Jurassic limestone layers of the karstic plateau surrounding Tonnerre. Dye tracing studies have demonstrated that some of the spring's water comes from the Laigne River which disappears underground in the Gouffre de la Garenne at Villaines-en-Duesmois, from Tonnerre. There is also a connection between the spring and the Gouffre d'Athée ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst Spring
A karst spring or karstic spring is a spring (outflow of groundwater) that is part of a karst hydrological system. Description Because of their often conical or inverted bowl shape, karst springs are also known in German-speaking lands as a ''Topf'' ("pot") which is reflected in names such as Aachtopf (the source of the Radolfzeller Aach) or Blautopf (the source of the Blau river in Blaubeuren). Karst springs often have a very high yield or discharge rate, because they are often fed by underground drainage from a large catchment basin. Because the springs are usually the terminus of a cave drainage system at the place where a river cave reaches the Earth's surface, it is often possible to enter the caves from karst springs for exploration. Large karst springs are located in many parts of the world; the largest ones are believed to be in Papua New Guinea, with others located in Mediterranean countries such as Bosnia and Herzegovina, Croatia, Turkey, Slovenia, and Italy. Types ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
