Sansfond

The Sansfond is small a French Rivière which runs in the department of the Coast-with Or (21) in area of Burgundy. It is an affluent of the Vouge out of left bank, therefore a tributary of a tributary of the the Rhone by Vouge, then the the Saone.

Toponymy

This river is sometimes spelled various manners: Sansfond, Without-Bottom, Hundred-Font,… The oldest reference to this river dates from IXe century: name " then is found; Cent-Fonts". The term of Latin origin " Makes " evoke a source, a fountain; " Hundred " could then indicate the existence of multiple sources. It seems consequently that " Cent-Fonts" that is to say original orthography. However, the local tradition preferred the denomination " bottomless " , perhaps suggesting a relative depth of the river (?). Today, the toponym of " Sansfond" is that which was retained, in particular in the cartography.

Geography

Sansfond takes its source with Perrigny-the-Dijon, the level of the farm of Sansfond, and is thrown in the Vouge on the level of the abbey of Cîteaux, on the territory of Saint-Nicolas-the-Cîteaux.

History

Initially, Sansfond was jettait in the Varaude, right before the village of Noiron-under-Gevrey. Running water lack for their Abbey, the first monks of Cîteaux decided to prolong the course of Sansfond until them. In addition to the digging of a channel, they built a tubular bridge, completed in 1220 and called Pont of Arvaux, in order to pass above the course of Varaude. Sansfond henceforth throws in the Vouge (cf " Géographie").

Common crossings

In the alphabetical order:

Hydrology

Sansfond is a river rather not very abundant, but very regular. The hydrometric station of Saulon-the-Street, locality located at ten kilometers of its confluence, raised, on a surface of 51,5 square kilometers (80% of the total area catchment), a module or interannual medium flow of 0,28 m ³ a second. The observations were made during one 18 years period going from 1989 to 2007.

Sansfond presents seasonal fluctuations of flow very little marked. The high waters are held in winter and are characterized by monthly flows oscillating between 0,307 and 0,370 m ³ a second, from November to April included (with an in February maximum - March). The low waters take place in summer, from July to September, involving a fall of the monthly medium flow going up to 0,184 m ³ in August, which is far from being weak. But the fluctuations are more marked over moreover short periods, or according to the years.

With the low water level, the VCN3 can fall until 0,110 m ³, in the event of dry period quinquennial, that is to say 110 liters a second, which is far from being severe and remains almost abundant for such a small river (see note).

As for the risings, they are usually extremely moderated, at least in the context of the catchment area of the Saone. The QIX 2 and QIX 5 are worth indeed respectively 1,5 and 2,3 m ³. The QIX 10 or calculated flow of decennial rising is of 2,8 m ³ a second and the QIX 20 of 3,4 m ³. As for the QIX 50 it was not calculated, for lack of duration of sufficient observation (see note).

The recorded maximum instantaneous flow with Saulon-the-Street was of 3,61 m ³ a second on March 14th, 2001, while the value maximum day laborer was of 3,08 m ³ a second on January 8th, 1994. If one compares the first of these values on a QIX scale, one notes that this rising was of a vicennial nature and thus unexceptional, because intended to repeat itself on average every approximately 25 years. On the whole, Sansfond is a not very abundant river. The Lame of water past in its basin is of 171 millimetres annually, which is close to twice less than the overall average to France all confused basins. It is also largely lower than the average of the basin of the the Saone (501 millimetres in Lyon). The specific Débit of the river (or Qsp) is assembled consequently at weak 5,4 liters a second and per square kilometer of basin.

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