Chée

The Chée is a Rivière the North-East of the France, affluent out of Right Bank of the Saulx, which crosses the departments of the Meuse and the Marne.

Hydrography

It takes its source in the commune meusienne Top-with-Chée (regrouping of communes, the source is with Hargeville-on-Chée), i.e. in the wooded and rainy area of the Barrois. It is thrown in the Saulx upstream of Vitry-en-Perthois, in the department of the Marne.

Chée thus belongs to the catchment area of the the Seine by the Saulx then by the Marne.

Affluents

the Small Chée
the Vière

Hydrology

With Shock-in front of-Louppy in the Meuse

The average interannual flow or module of the river with Shock-in front of-Louppy, locality located at long distance from its confluence, is worth already 1,56 m ³ a second for a very sprinkled portion of its catchment area of 113 km ². The water blade run out in this part of the basin is of 438 millimetres, which is raised, as for all the rivers resulting the heights of the Barrois, and much higher than that of the whole of the catchment area of the Seine (240 millimetres). Its specific Flow or Qsp is assembled consequently at rather solid 13,8 liters a second and per square kilometer.

With Bettancourt-the-Long in the Marne

Much downstream, in area Champagne-Ardenne, the flow of Chée was observed over one 36 years period (1971-2006), with Bettancourt-the-Long, locality of the department of the Marne located at a score of kilometers of its confluence with the Saulx. The catchment area of the river is there of 215 km ², that is to say the largest part of the totality of this one. It should be noted that, the station being upstream confluence of the Vière, the important flow of the latter is excluded from the figures which follow.

The interannual medium flow or module of the river to Bettancourt-the-Long is of 2,55 m ³ a second.

Chée present of the seasonal fluctuations of flow rather little marked compared to other rivers of the east of the basin of the Seine, with high waters of winter-spring carrying the average monthly flow on a level located between 3,92 and 5,17 m ³ a second, from December to March included (with an in January maximum), and prolonged enough low waters of summer, June to September included, with a fall of the monthly medium flow up to 0,675 m ³ in September. But these monthly averages hide fluctuations much more marked over short periods, more especially as the flow is variable according to the years.

With the low water levels, the VCN3 can fall until 0,036 m ³, that is to say 36 liters a second, which is severe, much more severe than the VCN3 of the other rivers of the area (Vière - 55 liters a second for a less flow almost half, Bruxenelle - 58 liters). Let us recall that the VCN3 is the past minimal quantity or minimal flow over three days consecutive.

As for the risings, they can be important for a small river equipped with a rather exiguous basin. Thus the maximum instantaneous flow recorded with Bettancourt-the-Long was of 27 m ³ a second on February 27th, 1997, while the value maximum day laborer was of 25,1 m ³ a second the same day. The QIX 2 and QIX 5, or flows calculated for a biennial and quinquennial rising, are worth respectively 18 and 22 m ³. The QIX 10 or calculated flow of decennial rising is of 25 m ³ a second, the QIX 20 of 27 m ³ and the QIX 50 of 30 m ³. (see note). One concludes from that the risings of February 1997, whose mention was made, were not even of a vicennial nature, and thus by no means exceptional.

On the whole Chée is a rather abundant river. The Lame of water past in this part (most important) of its catchment area is of 376 millimetres annually, which is definitely more than the overall average of France, and especially largely higher than the average of the totality of the basin of the the Seine (more or less 240 millimetres). The specific Flow (or Qsp) reached of this fact the rather high figure of 11,9 liters a second and per square kilometer of basin.

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