Wiental Canal
The Wiental Canal was built as a relief canal for the right and left Wientalsammelkanal between the Urania and the Rüdigerhof in Vienna .
Starting position
The increasing population and increasing economic use meant that the Vienna River was increasingly becoming one of the sources of cholera epidemics . The most momentous occurred in 1873 during the Vienna World Exhibition . The Vienna river collecting canals (" cholera canals ") were built along the Vienna in 1830, draining an area of around 5,800 hectares in districts 1, 3, 4, 5, 6, 7, 12, 13, 14, 15 and 16.
A total of 63 rain overflow weirs were built over a total distance of around 27.5 kilometers (left Wienflusssammler about 15 kilometers in length, right Wienflusssammler about 12.5 kilometers in length). The wastewater, which had reached a certain degree of dilution due to rainwater - which was considered permissible at the time the canals were built - could flow through this untreated into the Vienna River and subsequently via the Danube Canal into the Danube .
As the settlement progressed, the amount of wastewater increased, so that with the same sewer cross-section and constant weir height, the cesspool poured more and more often and more undiluted into the Vienna River, which, with increasing environmental awareness, resulted in an increasingly intolerable circumstance and demanded a solution.
description
The Wiental Canal is a canal tube built across the city over a length of 3,500 meters below the Wien River using a closed construction method. Starting from the Urania on the Danube Canal, where the canal is connected to the right main collecting canal relief canal, the first construction section with a length of 800 meters up to the city park was built between 1997 and 2001 . The construction costs for this section amounted to 16.1 million euros.
Between May 2003 and April 2005, the canal was built to the Ernst-Arnold-Park at the Rüdigerhof on the Rechten Wienzeile, always remaining under the Wien River . Then the two Wien river collecting canals were connected to the Wiental Canal and the technical facilities were installed.
The Wiental Canal has an outer diameter of 8.6 and an inner diameter of 7.5 meters and lies around 30 meters below the surface of the earth.
The construction phase in the area of the U1 line at Karlsplatz was technically complex . This was undermined at a distance of only three meters from the shield drilling machine. This subway section was secured by 90 injection wells filled with concrete.
task
The task of the Wiental Canal is not an accelerated discharge of wastewater. It is intended to absorb the mixed water that has previously overflowed in an uncontrolled manner and flowed uncleared into the Danube and, like a retention basin, dammed it until the main sewage treatment plant in Simmering , which was expanded for this purpose, has free capacity again. The Wiental Canal is then emptied. The capacity of the sewer tube is approximately 110,000 cubic meters.
Superordinate concept
The idea of building the Wiental Canal as an underground reservoir is part of the overall concept “ Master Plan 2015 - New Ways of Vienna's Wastewater Management and Water Protection ”, which is to be implemented by 2015.
The reason for this is the aim of the City of Vienna to prevent the untreated runoff of mixed water (rainwater plus wastewater) without having to build unused capacities in the main sewage treatment plant.
The plan is to use the storage volume of around 700,000 cubic meters of water available in the four large main sewers in the event of heavy rainfall and to divert the mixed water there in the quantities that the main sewage treatment plant in Simmering can process.
Individual evidence
- ↑ http://www.wien.gv.at/kanal/technik/wienfls.htm ( 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.
- ↑ Archived copy ( Memento of the original dated November 27, 2007 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.
- ↑ http://www.stahn.com/?n1:1&n2:2&n3:12&n4:73&lg:1
- ↑ http://www.stadt-wien.at/index.php?id=wiental-kanal
- ↑ http://www.stadtrechnungshof.wien.at/berichte/2004/lang/4-14-KA-V-30-1-5.pdf
Web links
- Wiental Canal
- Wiental Canal and the "Vienna Canal Network Control"
- Control office report on sewer network control (PDF; 51 kB)
Coordinates: 48 ° 12 ′ 12.7 ″ N , 16 ° 22 ′ 47.6 ″ E