Neuné


Neuné
Neuné

Near the La Chapelle sandpits
Origin Gerbépal
Mouth Vologne
Basin countries France
Length 24.5 km
Avg. discharge 2.22 m³/s
Basin area 96.9 km²

The Neuné is a river which flows in the Vosges department of France. It is a right tributary of the Vologne, and therefore a sub-tributary of the Moselle.

Contents

Geography

The Neuné rises within the commune of Gerbépal in the parc naturel régional des Ballons des Vosges, which also contains a part of its length. It flows first to the north-west, then towards the west, and finally towards the south-west where it joins the right bank of the Vologne, at the level of the small settlement of Champ-le-Duc. The Neuné's principal tributary is the B'Heumey, which joins with it in the commune of Chapelle-Devant-Bruyères.

Communes on the course of the Neuné

The Neuné flows through the following communes, from upstream to downstream: Gerbépal, Corcieux, La Houssière, Biffontaine, les Poulières, la Chapelle-devant-Bruyères, Laveline-devant-Bruyères and Champ-le-Duc in the Vosges department.

Nonetheless the communauté de communes du Val de Neuné grouping includes a slightly different set of communes: Gerbépal, Corcieux, Arrentès-de-Corcieux, La Houssière, Biffontaine, les Poulières, la Chapelle-devant-Bruyères, Vienville.

Hydrology

Le Neuné is a substantial river. Its flow rate has been measured over a 22-year period (1986-2007) at Laveline-devant-Bruyères, which is situated slightly away from its confluence with the Vologne[1]. The drainage surface studied is 94 km², or 97% of the total watershed of the river.

The average interannual flow rate, or discharge of the river at Laveline-devant-Bruyères is 2.22 m³/s.

The Neuné exhibits moderate seasonal fluctuations in flow rate. The high-water period occurs in the winter season, with average monthly instantaneous flow rates varying between 2.63 and 3.59 m³/s from November to March inclusive, with an overall maximum in March and a secondary maximum in January. From April onwards, the flow rate drops off quickly and continues until the low-water period, which occurs from July to September, with minimum monthly average instantaneous flow rate going down to 0.833 m³/s in August, still a comfortable flow for a small river. Fluctuations in flow rate can be more significant from year to year and over short time periods.

At low water, the three-year low instantaneous flow rate can drop to 0.25 m³/s in the case of a dry five-year period, or about 250 litres per second, which is not too severe.

As for floods, they can also substantial, considering the relatively small watershed. The Instananeous Maximum Flow Rate over 2 years (IMFR2) and the IMFR5 are 21 and 28 m³/s respectively. The IMFR10 is 32 m³/s and the IMFR20 is 37 m³/s, while the IMFR50 has not been calulated due to an insufficient history of measurements. The volumes of the Neuné's floods rise to as much as 30% of those of the Vologne.

The maximum instantaneous flow rate recorded at Laveline-devant-Bruyères during this period was 36.3 m³/s on 30 December 2001, while the maximum daily average flow rate was 32.6 m³/s on 4 October 2006. Comparing the first of these numbers with the different IMFR measurements of the river suggests that this flood was of the order of a 20-year event.

The Neuné is a substantial river. The runoff curve number in its watershed is 746 mm annually, which is over twice the overall average of France with all basins taken together, and clearly grater than the average of the French basin of the Moselle (which is 445 mm downstream of Metz). The specific flow rate of the river attaches a solid number to this fact: 23.6 litres per second per square kilometre of basin.

See also

The Neuné at Laveline-devant-Bruyères

External links

References

  1. ^ Banque Hydro - Station A4333010 - le Neuné à Laveline-devant-Bruyères (option Synthèse)

Coordinates: 48°11′N 6°47′E / 48.183°N 6.783°E / 48.183; 6.783


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