Sarce (river)

The Sarce is a French Rivière which runs in the department of the Aube (53). It is a direct affluent of the the Seine out of left bank.

Geography

Sarce takes its source in the commune of Bragelogne-Beauvoir, with 10 kilometers in the south-west of the Riceys. After 4 kilometers in direction of the east, the river is directed south towards north, parallel to the courses of the Hozain (in the west) and of the Laignes in the east. It is thrown in the the Seine (left bank) with Virey-under-Bar, with ten kilometers downstream from the Bar-on-Seine.

Common crossings

Sarce crosses the communes of Bragelogne-Beauvoir, Bagneux-the-Pit, Avirey-Lingey, Arrelles, Villiers-under-Praslin, Villemorien, Jully-on-Sarce and Virey-under-Bar, all located in the department of the Aube.

Hydrology

Sarce is a river very little abundant. Its flow was observed over one 14 years period (1985-1999), with Virey-under-Bar, locality of the department of the Aube, located little before its confluence with the the Seine. Studied surface is of 187 km ², i.e. it quasi totality of the catchment area of the river.

The interannual medium flow or module of the river with Virey-under-Bar is of 0,77 m ³ a second.

Sarce presents seasonal fluctuations of flow very marked, like very often in the oriental party of the basin of the Seine. The high waters are held in winter and at the beginning of spring and are characterized by average monthly flows oscillating between 1,07 and 1,52 m ³ a second, from January to April included (with an in January maximum and February). As of May, the flow falls quickly to the low waters of summer which take place of July mid-October, involving a fall of the monthly medium flow going up to 0,17 m ³ in August and 0,175 in September. But the fluctuations are much more marked over moreover short periods.

With the low water level, the VCN3 can fall until 0,001 m ³, in the event of dry period quinquennial, that is to say only 1 small liter a second, which is of course very severe, even for a small river (see note).

In addition, the risings are very little important, even taking into account the size enough exigüe of the basin. The QIX 2 and QIX 5 are worth indeed respectively 3,9 and 5,5 m ³. The QIX 10 or calculated flow of decennial rising is of 6,6 m ³ a second and the QIX 20 of 7,6 m ³. As for the QIX 50, it was not calculated, for lack of one duration of sufficient observation to determine it (see note). It appears thus that risings exceeding the 10 m ³ a second are highly improbable.

The recorded maximum instantaneous flow with Virey-under-Bar was of 8,82 m ³ a second on November 4th, 1998, while the value maximum day laborer was of 8,75 m ³ a second on November 2nd of the same year. If one compares the first of these values on a QIX scale exposed higher, one notes that this rising was largely higher than the vicennial rising defined by the QIX 20 and thus very exceptional. On the whole, Sarce is a river irregular and very little abundant in the context of the rivers of the basin of the Seine. The Lame of water past in its basin is of 130 millimetres annually, which is more twice the lower than the overall average of France all confused basins, and largely lower also than the average of the basin of the the Seine (more or less 240 millimetres). The specific Débit of the river (or Qsp) is assembled consequently at thin 4,1 liters a second and per square kilometer of basin.

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