Petite Glâne

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Petite Glâne
Course of the Petite Glâne

Course of the Petite Glâne

Data
Water code CH : 790
location Switzerland
River system Rhine
Drain over Broye  → Zihl Canal  → Aare  → Rhine  → North Sea
source on the municipal boundary between Estavayer and Valbroye near Vuissens
46 ° 44 ′ 45 ″  N , 6 ° 47 ′ 3 ″  E
Source height 674  m above sea level M.
muzzle near Salavaux (municipality of Constantine ) in the Broye coordinates: 46 ° 54 ′ 51 ″  N , 7 ° 1 ′ 31 ″  E ; CH1903:  568 515  /  195 986 46 ° 54 '51 "  N , 7 ° 1' 31"  O
Mouth height 429  m above sea level M.
Height difference 245 m
Bottom slope 8.2 ‰
length 30 km
Catchment area 100.54 km²
Discharge
A Eo : 100.54 km²
at the mouth 		MQ
Mq
 		1.12 m³ / s
11.1 l / (s km²)
Petite Glâne (Switzerland)
source
source
muzzle
muzzle
Source and mouth of the Petite Glâne

The Petite Glâne (German as much as Kleine Glane ) is a 30 km long left tributary of the Broye . It drains a section of the Central Plateau of French- speaking Switzerland, flowing through areas of the cantons of Vaud and Friborg .

Surname

The river name goes back to the Celtic word glana (pure).

geography

course

The source of the Petite Glâne is at the Vers le Moulin farmstead on the edge of the Vuissens exclave on the municipal boundary between Estavayer and Valbroye . It is located at 674  m above sea level. M. in a hollow in the Molasse hill country between the valleys of Mentue in the west and Broye in the east. In its upper reaches, the Petite Glâne flows into the canton of Vaud in a relatively wide valley with a flat floodplain to the northeast, flanked by the up to 150 m higher ridges of the Molasse hills. However, it soon returns to Freiburg soil (exclave Estavayer-le-Lac ). The Bainoz , the most important tributary of the Petite Glâne, flows from the left below the village of Granges-de-Vesin .

Up to Montet (Broye) the Petite Glâne has a continuous gradient of 2 to 4%. Here it enters the far west of the Broye plain and overcomes only a difference in altitude of 25 m over the last 15 km. In the agriculturally intensively used plain, the Petite Glâne flows parallel to the Broye for more than 10 km. It always runs along the northwestern edge of the Broye plain, at the foot of the ridge between the plain and Lake Neuchâtel . Due to the complicated course of the cantonal borders in the Broyetal, the Petite Glâne changes the territories of the cantons of Vaud and Friborg several times. It only flows 1 km west of Lake Murten near Salavaux (municipality of Constantine ) at 429  m above sea level. M. in the Broye.

Catchment area

The catchment area of ​​the Petite Glâne is 100.54 km² and consists of 12.4% wooded area , 79.4% agricultural area and 7.8% settlement area .

Area distribution

The mean height of the catchment area is 535  m above sea level. M. , the minimum height is 429  m above sea level. M. and the maximum height at 819  m above sea level. M.

Tributaries

  • Le Ruisseau des Barges ( right )
  • L'Autavaux ( right )
  • Le Ruisseau de Riaux ( right )
  • Le Ruisseau de la Palut ( right )
  • Le Ruisseau du Creux des Prés ( right )
  • Le Baino ( left )
  • Le Ruisseau de l'Arignon ( left )
  • Le Ruisseau des Avanturies ( right )
  • Fossé Neuf ( right )
  • Le Ruisseau du Grabe ( left )
  • Grand Fossé ( right fork )
  • Le Ruisseau de Chesard ( left )
  • Le Ruisseau des Vaux ( left )
  • La Chenaletta ( left )
  • Le Ruisseau de Gruon ( left )
  • Le Ruisseau de Seyvaux ( left )
  • Le Montauban ( left )

Hydrology

At the confluence of the Petite Glâne in the Broye, its modeled mean flow rate (MQ) is 1.12 m³ / s and its flow regime type is pluvial inférieur .

The modeled monthly mean discharge (MQ) of the Petite Glâne in m³ / s

character

The upper reaches of the Petite Glâne are still in a near-natural, partially natural state. However, the entire section in the Broye Plain is canalized and straightened for large parts. Here, the Grand Fossé canal is derived from the Petite Glâne, which is used to irrigate the crops on the plain. The hydropower of the Petite Glâne, especially the upper course of the river, was previously used to run mills and sawmills.

Individual evidence

  1. ↑ a b Geoserver of the Swiss Federal Administration ( information )
  2. ↑ Evaluations of the water network. (XLSX) FOEN , December 2013, accessed on August 9, 2017 (listing of Swiss rivers> 30km).
  3. ↑ a b c d Modeled mean annual discharge. In: Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved August 22, 2017 .
  4. ↑ "Hidden behind the mean values" - the variability of the discharge regime , p. 7