Rosanna
| Rosanna | ||
 The Rosanna near St. Anton am Arlberg |
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| Data | ||
| location | Tyrol , Austria | |
| River system | Danube | |
| Drain over | Sanna → Inn → Danube → Black Sea | |
| source | in the Verwall group near the Muttenjoch 46 ° 59 ′ 11 ″ N , 10 ° 10 ′ 5 ″ E |
|
| Source height | 2597 m above sea level A. | |
| confluence | at Tobadill with the Trisanna to Sanna Coordinates: 47 ° 7 '2 " N , 10 ° 29' 25" E 47 ° 7 '2 " N , 10 ° 29' 25" E |
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| Mouth height | 870 m above sea level A. | |
| Height difference | 1727 m | |
| Bottom slope | 41 ‰ | |
| length | 42.2 km | |
| Catchment area | 275.5 km² | |
| Discharge at the Strengen A Eo gauge : 237.5 km². Location: 1.94 km above the mouth |
NNQ (17.12.2005) MNQ 1971–2010 MQ 1971–2010 Mq 1971–2010 MHQ 1971–2010 HHQ (23.08.2005) |
920 l / s 2.05 m³ / s 9.45 m³ / s 39.8 l / (s km²) 58.5 m³ / s 186 m³ / s |
| Reservoirs flowed through | Verwallsee | |
| Communities | St. Anton am Arlberg , Pettneu am Arlberg , Flirsch , Strengen | |
 Upper course in the Rosanna Gorge |
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The Rosanna is a 42 km long river in Tyrol that flows through the Verwall and Stanzer Tal .
course
The Rosanna rises from a small lake in the Verwall below Grieskogel and Fädnerspitze not far from the border with Vorarlberg at an altitude of almost 2600 m above sea level. A. It flows north through a valley that is initially called Ochsental, after the Albonabach creek from the left is called Schönverwall. From the confluence of the Fasultal from the right and the Pfluntal from the left at the Konstanzer Hütte it is called Verwalltal. Here the brook to the Verwallsee is artificially dammed. This lake is used to regulate the Rosanna to protect against flooding and at the same time to generate energy. After the Rosannaschlucht it reaches St. Anton am Arlberg and flows in an east to south-east direction through the Stanzer Tal . At the confluence of the Paznaun in the Stanzer Valley below Wiesberg Castle in the municipality of Tobadill , the Rosanna joins the Trisanna to form the Sanna . This flows into the Inn 7 km further in Landeck . The Rosanna has a stationed length of 42.15 km.
The most important tributaries are Albonabach, Pflunbach, Maroibach, Arlenbach, Lengeruibach, Schnanner Bach, Griesbach and Rammlesbach from the left and Fasulbach, Maroibach, Moosbach, Stockibach, Malfonbach and Oberer and Unterer Klausbach from the right.
Catchment area
The natural catchment area of the Rosanna is 275.5 km². In the upper reaches, like the Fasulbach, part of the water is diverted into the Kops reservoir of the illwerke vkw , which reduces the hydrologically effective catchment area by 33.8 km².
The highest point in the catchment area is the Hohe Riffler at 3168 m above sea level. A. In the catchment area of the Rosanna there are 31 glaciers with a total area of 4.3 km², which corresponds to a degree of glaciation of 1.6% (as of 2002). However, only part of the flow regime of the Rosanna is retained by the diversions.
Water flow
The mean discharge at the Strengen gauge is 9.45 m³ / s, which corresponds to a discharge rate of 39.8 l / s · km². The Rosanna has a nival runoff regime , which is dominated by the snowmelt in the higher elevations of the catchment area. The glaciers have little influence due to the diversions. The monthly mean of the month with the highest discharge, June, is 23.3 m³ / s, almost ten times that of the month with the lowest discharge, February, with 2.46 m³ / s.
During the flood in August 2005 , the highest flow rate to date was measured at 186 m³ / s at the Strengen gauge. The Rosanna stepped over its banks in several places and destroyed a. the Arlbergstrasse B 197 in St. Anton and undermined the embankment of the Arlbergbahn between Flirsch and Strengen. In contrast to the Paznaun, however, due to the shape of the Stanzer Valley, there was no large-scale flooding.
ecology
The ecological condition of the Rosanna is classified as very good until shortly before St. Anton and below Strengen, otherwise as good to moderate. The bottom of the river is unobstructed, the banks are built up at certain points above St. Anton, from there in parts to continuously. The water quality class is I-II.
various
- In 1953, in Vienna-Floridsdorf , Rosannagasse was named after the river.
Web links
- Water level of the Rosanna at the gauge Strengen-Zintlwald OWF (Hydrographischer Dienst Tirol)
- Entry on Rosanna in the Austria Forum (in the AEIOU Austria Lexicon )
Individual evidence
- ↑ a b c d TIRIS - Tyrolean regional planning and information system
- ↑ a b Land Tirol: The Landeck / Sanna gauge (PDF; 487 kB)
- ↑ a b c d Federal Ministry of Agriculture, Forestry, Environment and Water Management (ed.): Hydrographisches Jahrbuch von Österreich 2010. 118th volume. Vienna 2012, p. OG 89, PDF (12.6 MB) on bmlrt.gv.at (yearbook 2010)
- ↑ Federal Ministry of Agriculture, Forestry, Environment and Water Management (Ed.): Flood 2005 - Event documentation of the Federal Water Management Administration, the Forestry Service for Torrent and Avalanche Control and the Hydrographic Service. Vienna 2006 ( PDF; 5.2 MB ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. )
- ↑ Federal Ministry of Agriculture, Forestry, Environment and Water Management (ed.): Saprobiological water quality of the flowing waters of Austria. As of 2005. ( PDF; 1 MB ( Memento of the original from December 22, 2015 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. )
