Bressonne

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Bressonne / Bressonnaz
Data
Water code CH : 804
location Switzerland
River system Rhine
Drain over Carrouge  → Broye  → Zihl Canal  → Aare  → Rhine  → North Sea
Headwaters near Lausanne in the heights of the Jorat , northeast of the Col du Chalet-à-Gobet pass,
46 ° 34 ′ 42 ″  N , 6 ° 42 ′ 45 ″  E
Source height approx.  900  m above sea level M.
muzzle south-east of Château-d'Oex -Les Moulins Coordinates: 46 ° 38 ′ 56 ″  N , 6 ° 47 ′ 23 ″  E ; CH1903:  550 331  /  166599 46 ° 38 '56 "  N , 6 ° 47' 23"  O
Mouth height 529.7  m above sea level M.
Height difference approx. 370.3 m
Bottom slope approx. 23 ‰
length approx. 15.9 km
Catchment area 32.31 km²
Drain
at the mouth 		MQ
 680 l / s

The Bressonne , also called Bressonnaz in the Patois , is a left tributary of the Carrouge in the canton of Vaud in Switzerland, almost 16 km long . It drains a section of the Waadtländer Mittelland and belongs to the catchment area of ​​the Rhine .

Surname

Bressonne is the feminine form of the family name Bresson , which is derived from the Latin Brictius .

geography

course

The headwaters of the Bressonne are located near Lausanne at around 900 m above sea level. M. in the wooded heights of the Jorat , northeast of the Col du Chalet-à-Gobet pass . As a small stream, the Bressonne initially flows eastwards before turning north-northeast at Montpreveyres . With a few exceptions, the valley of the Bressonne is deepened around 20 to 80 m into the surrounding molasse heights and is mostly wooded. On its way, the Bressonne takes on the Ruisseau de Corcelles from the left , which also rises on the Jorat high plateau.

Southwest of Moudon , the Bressonne reaches the Broye valley and flows out at 529.7 m above sea level. M. at the hamlet of Les Moulins in the Carrouge and this flows after about 400 m into the Broye.

Catchment area

The catchment area of ​​the Bressonne is 32.31 km² and is drained through it via the Carrouge , Broye , Aare and Rhine to the North Sea.

It consists of 42.0% wooded area , 51.0% agricultural area and 6.9% settlement area .

Area distribution

The mean height of the catchment area is 784  m above sea level. M. , the minimum height is 530  m above sea level. M. and the maximum height at 929  m above sea level. M.

Tributaries

  • Craivavers ( right ), 2.0 km
  • Liaisettes ( right ), 1.3 km
  • Rochette ( left ), 2.1 km
  • Cerjux ( Robastiou ) ( left ), 3.3 km
  • Moleire ( left ), 1.0 km
  • Botentrat ( right ), 1.6 miles
  • Corcelles ( left ), 4.5 miles
  • Pissevache ( left ), 3.7 km

Hydrology

At the confluence of the Bressonne in the Carrouge, its modeled mean flow rate (MQ) is 0.68 m³ / s. Their discharge regime type is nivo-pluvial jurassia and their discharge variability is 24.

The flow rate of the Bressonne fluctuates relatively strongly over the course of the year. The highest water levels were determined for the months of December to March. The flow rate reached its peak in February at 1.11 m³ / s. From March onwards, the discharge drops noticeably month after month and reaches its lowest level in August at 0.24 m³ / s, only to increase steadily from month to month in September.

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

nature and environment

Long stretches of the Bressonne creek have been preserved in their natural or near-natural state. Main road 1 runs through the Bressonne Valley from Lausanne via Moudon to Payerne , which was also used by transit traffic, especially before the opening of the motorway from Bern to western Switzerland.

Notes and individual references

  1. ↑ Geoserver of the Swiss Federal Administration ( information )
  2. ↑ a b c d Topographical catchment areas of Swiss waters: Bressonne
  3. ↑ Upper course name
  4. ↑ "Hidden behind the mean values" - the variability of the discharge regime , p. 7
  5. ↑ The discharge variability describes the extent of the fluctuations in the mean discharge of individual years around the long-term mean discharge value.