Aujon

Aujon is a French river of the area Champagne-Ardenne, which runs in the departments of Haute-Marne and the Aube. It is an important affluent of the Aube, therefore a tributary of a tributary of the the Seine.

Geography

The river is born in Haute-Marne with Perrogney-the-Fountains with a dozen from kilometers with the west-south-west from Langres. Throughout its course in a largely timbered area, it has a south-eastern/north-western orientation. Aujon bathes the towns of Arc-in-Barrois and Châteauvillain. It joins the Paddle with Longchamp-on-Aujon, not far from Clairvaux.

Affluents

the Gorgeot
the Dhuy
the Brauze
the Reindeer

Hydrology

Aujon is a rather abundant river, as the majority of the rivers of the east of the basin of the Seine. Its flow was observed over one 28 years period (1972-2000), with Rennepont, locality of the Département of the Paddle located very close to its confluence with the Aube. The catchment area of the river is there of 481 km ², that is to say it quasi totality of this last.

The interannual medium flow or module of the river with Rennepont is of 6,45 m ³ a second.

Aujon present of the seasonal fluctuations of flow marked enough, with high waters of winter-spring carrying the average flow monthly on a level located between 8,37 and 12,7 a second, from December to April included (with an in February maximum), and low waters of summer, from July to September included, with a fall of the monthly medium flow up to 1,44 m ³ in August, which remains comfortable, it is true.

With the low water level, the VCN3 can fall until 0,33 m ³, in the event of dry quinquennial period, that is to say 330 liters a second, which is not too severe. The VCN3 is the past minimal quantity or minimal flow over three days consecutive.

As for the risings, they can be rather important, characteristic shared by the majority of the rivers of the east of the basin of the Seine.

Thus the QIX 2 and QIX 5 or calculated flows of biennial and quinquennial rising are worth respectively 37 and 49 m ³ a second. The QIX 10 or calculated flow of decennial rising is of 57 m ³ a second, the QIX 20 of 64 m ³, while the QIX 50 is assembled to 74 m ³ a second (see note).

The recorded maximum instantaneous flow with Rennepont during the period of observation, was of 71,2 m ³ a second on December 30th, 1999, while the value maximum day laborer was of 68,6 m ³ a second on December 31st of the same year. By comparing the first of these values on a QIX scale of the river, one notes that this rising was of order cinquantennal, and thus rather exceptional.

Aujon is an abundant river. The Lame of water past in its catchment area is of 425 millimetres annually, which is definitely higher than the overall average of France all confused basins, and as well sure to the average of the basin of the the Seine (240 millimetres). The specific Débit of the river (or Qsp) posts of this fact a rather robust figure: 13,4 liters a second and per square kilometer of basin.

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