Lombach (Aare)
Lombach | ||
Lombach in Unterseen just before the mouth |
||
Data | ||
Water code | CH : 350 | |
location |
Prealps
|
|
River system | Rhine | |
Drain over | Aare → Rhine → North Sea | |
source |
Alp Lombach 46 ° 44 ′ 43 ″ N , 7 ° 54 ′ 35 ″ E |
|
Source height | approx. 1564 m above sea level M. | |
muzzle | at Unterseen in the Thunersee coordinates: 46 ° 40 ′ 46 " N , 7 ° 48 ′ 47" E ; CH1903: 628 647 / 169870 46 ° 40 '46 " N , 7 ° 48' 47" O |
|
Mouth height | 558 m above sea level M. | |
Height difference | approx. 1006 m | |
Bottom slope | approx. 82 ‰ | |
length | 12.2 km | |
Catchment area | 46.75 km² | |
Discharge at the mouth of the A Eo : 46.75 km² |
MQ Mq |
3.16 m³ / s 67.6 l / (s km²) |
Left tributaries | Bodmibach | |
Right tributaries | Traubach , Wagisbach, Büelbach | |
Communities | Habkern , Unterseen |
The Lombach is a 12-kilometer-long river in the Swiss canton of Bern , which flows into Lake Thun near Unterseen . He has worked with the Lütschine by sediment the Bödeli formed that the lake from Lake Brienz separates.
geography
course
The headwaters of the Lombach are at around 1564 m above sea level. M. on the Alp Lombach below the Augstmatthorn . The Alp also forms the headwaters of the Laublägerlibach , a source brook of the Emme, which rises just a little to the north.
From here on, it meanders mostly in a south-westerly direction through a mostly wooded valley that is bordered in the south by the Brienzergrat . He passes the village of Habkern , which is on a slope above the river. Here, with the Traubach , it receives its most important tributary.
At St. Niklausen it leaves the valley and is now straightened, touches Unterseen and finally flows out at an altitude of 558 m above sea level. M. in Lake Thun, where it has formed a small alluvial cone .
Its approximately 12.2 km long run ends approximately 1006 meters below its source, so it has an average bed gradient of 82 ‰.
Catchment area
The 46.75 km² catchment area of the Lombach is located in the foothills of the Alps and is drained via the Aare and the Rhine to the North Sea.
It consists of 53.8% planted area , 35.6% agricultural area , 1.7% settlement area , 0.6% water area and 8.3% unproductive areas.
The mean height of the catchment area is 1408 m above sea level. M. , the minimum height is 557 m above sea level. M. and the maximum height at 2160 m above sea level. M.
Tributaries
- Madgräbli ( right ), 1.2 km
- Hüttenegggrabe ( right ), 1.0 km
- Bodmibach ( left ), 2.8 km, 2.47 km²
- Allmigräbli ( right ), 1.0 km
- Schwarzbach II ( right ), 1.4 km
- Stadelgrabe ( right ), 1.3 km
- Gschpisgräbli ( right ), 1.2 km
Hydrology
Main hydrological strand
Direct comparison of the two upper reaches at the confluence:
Surname | length
[in km] |
EZG
[in km²] |
MQ
[in m³ / s] |
---|---|---|---|
Lombach | 4.9 | 7.55 | 0.52 |
Traubach | 7.6 | 22.91 | 1.72 |
The longer Traubach also has the larger intake system and is richer in water. It is thus the main hydrological branch of the Lombach river system . The total length of the Lombach-Traubach line is 14.9 km.
Discharge data
At the confluence of the Lombach in the Thunersee the modeled mean flow rate (MQ) is 3.16 m³ / s. The discharge regime type is nival de transition and the discharge variability is 19.
Individual evidence
- ↑ a b Geoserver of the Swiss Federal Administration ( information )
- ↑ Water network in the WebGis geographic information system of the canton of Bern
- ↑ a b c d Topographical catchment areas of Swiss waters: sub-catchment areas 2 km². Retrieved August 2, 2018 .
- ↑ Topographic catchment areas of Swiss waters: Lombach (upper reaches)
- ↑ Topographic catchment areas of Swiss waters: Traubach
- ↑ "Hidden behind the mean values" - the variability of the discharge regime , p. 7
- ↑ The discharge variability describes the extent of the fluctuations in the mean discharge of individual years around the long-term mean discharge value.