Blies

The Blies is free a Rivière - German, fascinating source in the assemblies of the Hunsrück and crossing the town of Saint-Wendel, Ottweiler, Neunkirchen, Blieskastel (one of the cities named according to the river) in Germany and of Sarreguemines, in the department of the the Moselle, where it joined the the Saar.

Hydrology

With its confluence with Sarreguemines, Blies has a medium flow slightly higher than that of the Saar.

Blies is by far the most important affluent of the Saar. Its flow was observed during one 30 years period (1977-2007), with Bliesbruck, locality of the department of the the Moselle located at about fifteen km upstream of its confluence with Sarreguemines. The catchment area of the river is at this place of 1 930 km ² are more or less 95% of the entirety of the basin.

The interannual medium flow or module of the river with Bliesbruck is of 18,2 m ³ a second. Blies present of the seasonal fluctuations definitely less than the Saar than it thus contributes to regularize, with high waters of winter-spring carrying the average monthly flow on a level of 20,7 with 32,0 m ³ a second, from December to April included (with an in February maximum), and low waters of summer, June to September included, with an average monthly minimum of 8,19 in August (against 4 m ³ only for the Saar with Sarreguemines).

In period of low water level, the VCN3 can fall until 3,7 m ³ (1,8 m ³ for the Saar), in the event of dry period quinquennial, which remains very comfortable for the area. Let us recall that the VCN3 is the past minimal quantity or minimal flow over three days consecutive.

The risings are less than those of the other rivers of the north of the basin of the Moselle in Lorraine. The QIX 10 or calculated flow of decennial rising is of 210 m ³ a second, the QIX 20 is worth 240 m ³ a second while the QIX 50 is assembled to 280 m ³. The QIX 2 and QIX 5 are worth as for them respectively 130 and 180 m ³ (see note).

However the recorded maximum instantaneous flow was of 466 m ³ a second on December 21st, 1993, and the value maximum day laborer was of 344 m ³ a second the following day. These risings seem to have been completely exceptional, since exceeding the QIX 50 of almost 50 %.

Blies is a fairly abundant river. The Lame of water past in its catchment area is of 298 millimetres annually, which is a little lower than the overall average of France all confused basins, like with that of the basin French of the Saar, but definitely lower than the average of the totality of the French basin of the the Moselle (445 millimetres with Hauconcourt). The specific Débit (or Qsp) is of 9,4 liters a second and per square kilometer of basin.

Random links: