Ranna
| Ranna | ||
 |
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| Data | ||
| Water code | DE : 19116 | |
| location | District of Passau , District of Rohrbach | |
| River system | Danube | |
| Drain over | Danube → Black Sea | |
| source | southeast of Sonnen 48 ° 40 ′ 43 ″ N , 13 ° 44 ′ 1 ″ E |
|
| Source height | approx. 815 m | |
| muzzle | at Niederranna in the Danube Coordinates: 48 ° 28 '27 " N , 13 ° 46' 33" E 48 ° 28 '27 " N , 13 ° 46' 33" E |
|
| Mouth height | 285 m above sea level A. | |
| Height difference | approx. 530 m | |
| Bottom slope | approx. 19 ‰ | |
| length | 28.2 km | |
| Discharge at the Oberkappel A Eo gauge : 132.5 km². Location: 10.22 km above the mouth |
NNQ (23.09.1991) MNQ 1951–2010 MQ 1951–2010 Mq 1951–2010 MHQ 1951–2010 HHQ (12.08.2002) |
380 l / s 1.14 m³ / s 3.06 m³ / s 23.1 l / (s km²) 38.4 m³ / s 146 m³ / s |
| Reservoirs flowed through | Rannasee , Rannastausee | |
 Lower Ranna in the NSG Rannatal |
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 The Ranna Lake |
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The Ranna is a northern tributary of the Danube in Lower Bavaria and in the upper Mühlviertel , Upper Austria . In the lower reaches it forms the largely untouched Rannatal , a nature reserve and a European protected area.
Run and landscape
The Ranna rises in the Bavarian Forest , southeast of Sonnen , and then flows southwards throughout. To the northeast of Obernzell , the river passes the village of Wildenranna .
The river crosses the border with Austria in an artificially created bathing lake , the Rannasee , with an area of 20 hectares the largest bathing lake in the Bavarian Forest , with bathing bays, pedal boat rental and a 120 meter long water slide .
Then it flows through the village of Oberkappel , where the Osterbach flows into the Ranna.
Immediately after Oberkappel begins the Rannastausee , popularly known as the mouse hole . The lake was created in 1954 by the construction of the Rannatalsperre of the Ranna pumped storage power plant and is about 3.5 km long. It is also a popular fishing water. A natural hiking trail runs around the lake , with six Kneipp stations in the upper area. A fitness course was created in the lower area. In the middle, the Konzingersteg connects the two banks.
After the Rannatalsperre, the Ranna forms a deeply furrowed gorge, the Rannatal nature reserve. Altenhof Castle is located high above the Ranna Valley to the east , followed by the Falkenstein castle ruins . To the west of the Ranna valley between Ranna and the Danube follows the Rannariedl Castle .
At the end of the valley near Niederranna , the Ranna finally flows into the Danube.
Tributaries and lakes
Tributaries and lakes from the source to the mouth. Selection.
- Gensbach , from the right near Sonnen - Rannaberg
- Steinbächl , from the left near Wegscheid - Steinbachhäusl
- Schartenbach , from the left in front of Wegscheid- Wildenranna
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Flows through at 512 m above sea level. NHN the Rannasee near Wegscheid- Maierhof
- Stierbach , from the left in the Rannasee before Maierhof, 7.7 km and 16.3 km².
- Schindlbächl , from the right in Rannasee across from Wegscheid- Raschmühl
- Schindlbach , from the right in the Rannasee opposite Raschmühl in the same bay as the previous one
- Eidenbächl , from the left near Wegscheid- Eidenberg
- Osterbach , from the left near Wegscheid- Kappel on the Bavarian-Upper Austrian border, 20.4 km and 70.1 km².
- Grubbergbach , from the right near Oberkappel / Neustift im Mühlkreis - Grubberg
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Then flows through the elongated Rannastausee
- Zanklbachl , from the left in the Rannastausee near Pfarrkirchen im Mühlkreis - Grettenbach
- Unteraschenberger Bach , from the right in the Rannastausee near Neustift- Unteraschenberg
- Willramsbach , from the left at Pfarrkirchen- Konzing
- Stöcklbach , from the right near Neustift- Maisreith
- Breimühlbach , from the right near Neustift- Steinlacken
Rannatal nature reserve
The area south of the reservoir has been designated as a nature reserve Rannatal ( n108 ⊙ ) with 140.34 hectares since 2002 , and - not yet implemented by state law - as a Natura 2000 area of the same name ( Fauna-Flora-Habitat Directive , FFH, AT3125000 / nn25 ⊙ ) ∗ , with 228.00 hectares. The nature reserve also intervenes somewhat in the large European nature reserve Upper Danube and Aschachtal (AT3122000 / eu05_1), the FFH area extends this to the north.
The forests and rocky sites of the Ranna Valley are home to a large number of lesser-known species, such as the green lizard , the fire salamander or the Aesculapian snake . Due to the inaccessibility and the special climate in the deep Kerbtal , an unusually large variety of mosses and lichens can be found. As a further special feature, there are several block heaps in the Rannatal , which also represent an important habitat.
Individual evidence
- ↑ Federal Ministry of Agriculture, Forestry, Environment and Water Management (ed.): Hydrographisches Jahrbuch von Österreich 2010. 118th volume. Vienna 2012, p. OG 156, PDF (12.6 MB) on bmlrt.gv.at (yearbook 2010)
- ↑ Rannatal nature reserve. (https) In: Genisys detailed view. State of Upper Austria, accessed on November 5, 2010 .
- ↑ FFH area Rannatal. (https) In: Genisys detailed view. State of Upper Austria, accessed on November 5, 2010 .
- ↑ Grims F. , The moss flora of the lower Rannatales, contributions to the natural history of Upper Austria 13: 217–245, 2004 (PDF; 2.1 MB)
- ∗ The first number is the serial number of the common European list, the second that of the Upper Austrian Nature Conservation Book