Dürrach (Isar)
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Dürrach upper course: Tannauerbach |
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 Catchment area of the Dürrach |
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| Data | ||
| Water code | AT : 2-6-24, DE : 16152 | |
| location | Tyrol , Austria and Bavaria , Germany | |
| River system | Danube | |
| Drain over | Isar → Danube → Black Sea | |
| source | below the Hohen Gans in the eastern Karwendel 47 ° 28 ′ 30 ″ N , 11 ° 39 ′ 2 ″ E |
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| Source height | 1658 m above sea level A. | |
| muzzle |
Sylvensteinsee (Isar) coordinates: 47 ° 33 ′ 30 " N , 11 ° 32 ′ 30" E 47 ° 33 ′ 30 " N , 11 ° 32 ′ 30" E |
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| Mouth height | 767 m above sea level NN | |
| Height difference | 891 m | |
| Bottom slope | 60 ‰ | |
| length | 14.9 km | |
| Catchment area | 107.84 km² | |
| Discharge at the Dürrach A Eo gauge : 106 km² Location: 900 m above the mouth |
NNQ (13.10.1986) MNQ 1952–2006 MQ 1952–2006 Mq 1952–2006 MHQ 1952–2006 HHQ (23.08.2005) |
67 l / s 335 l / s 2.19 m³ / s 20.7 l / (s km²) 83.1 m³ / s 348 m³ / s |
| Left tributaries | Schwarzenbach , Kotzenbach , Krottenbach | |
| Right tributaries | Kesselbach | |
| Communities | At the Achensee , Lenggries | |
 Dürrachklamm |
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The Dürrach , formerly Dürach , is originally a 17.5 km long right tributary of the Isar in Tyrol (9 river kilometers) and Bavaria.
Waters and landscape
The catchment area of the Dürrach lies in the Vorkarwendel and includes all valleys enclosed by its ridges. It rises in a cirque between the Hohen Gans ( 1950 m above sea level ) in the east and the Schleimsjoch ( 1809 m above sea level ) in the west, about 1650 m above sea level. The seven kilometer long upper course is called the Tannauerbach and is one of several spring streams of roughly the same length and strength in a valley fan in the southern part of the Vorkarwendel, which has several peaks over 2000 m above sea level.
Geologically, the valley fan belongs to an inclination , the Karwendelmulde . Plumsbach and Tiefenbach still flow into the upper reaches . At the lowest point of the fan, it joins the Eiskönigbach , which in turn has the Baumgartenbach as an equally strong tributary. The center and exit valley of the valley fan are called the Bächental . At the transition from this brook valley to the lower Dürr valley, the Kesselbach flows from the east , and the river crosses the border to Germany. In Bavaria the Kotzenbach flow from the left and the Krottenbach just before the Sylvensteinspeicher in a gorge . The bottom two kilometers of the river sank in the Sylvensteinsee at the end of the 1950s, so that the Dürrach is now just under 15 km long. Before that, the Dürrach flowed into the Isar below the old Fall . In the Austrian section, the Dürrach has water quality class I (as of 2005).
Technical interventions
Immediately below the junction there is a dam with a hydroelectric power station, from which a large part of the water is diverted towards Achensee , so that the natural course of the river here lives up to its name. The drainage into the Achensee reduces the hydrologically effective catchment area by 62.4 km². In 2010, a large bed load dam was built on the Bavarian part of the Dürrach in order to reduce the sediment entry into the Sylvenstein reservoir.
There is an oil shale mine on the eastern flank of the Rether Horn above the Tiefenbach .
Bridge over the Tannauerbach
Bridge over the Dürrachklamm
Web links
- Current level at the Bavarian flood news service on hnd.bayern.de
- Hydrographic Central Office: Hydrographisches Jahrbuch 2010 , p. NL 2 u. a. (PDF)
Individual evidence
- ↑ a b tirisMaps
- ↑ Directory of creek and river areas in Bavaria - Isar river area, page 7 of the Bavarian State Office for the Environment, as of 2016 (PDF; 2.5 MB)
- ^ German Hydrological Yearbook Danube Region 2006 Bavarian State Office for the Environment, p. 187, accessed on October 4, 2017, at: bestellen.bayern.de (PDF, German, 24.2 MB).
- ↑ Federal Ministry of Agriculture, Forestry, Environment and Water Management (ed.): Saprobiological water quality of the flowing waters of Austria. As of 2005. bmlfuw.gv.at ( Memento of the original from December 22, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 1 MB).
- ↑ Federal Ministry of Agriculture, Forestry, Environment and Water Management (ed.): Hydrographisches Jahrbuch von Österreich 2010. 118th volume. Vienna 2012, p. OG 425, PDF (12.6 MB) on bmlrt.gv.at (yearbook 2010)
