Schletterer M.,TIWAG Tiroler Wasserkraft AG |
Senn G.,TIWAG Tiroler Wasserkraft AG |
Menghin M.,TIWAG Tiroler Wasserkraft AG |
Hubmann M.,ARGE Limnologie GesmbH |
And 4 more authors.
WasserWirtschaft | Year: 2015
Construction work of the fish pass in Wenns was started in late 2013 and the project was successfully completed soon after in April 2014. The 140 m long structure is a combination of a near-natural bypass channel and a special vertical slot pass so that fish (mainly brown trout) can safely bypass the weir. In addition, a residual flow facility ensures a minimum flow of 600 l/s. TIWAG is the first company in Austria to install an innovative system to monitor the functionality of the fish pass at Wenns. The Riverwatcher fish counter supplied by Icelandic company VAKI is a fish-friendly alternative to fish traps and electrofishing equipment. The system has already proven its worth in many European: watercourses with a great diversity of species.
Haas C.,I AM HYDRO Haas and Thumser GbR |
Thumser P.,I AM HYDRO Haas and Thumser GbR |
Volker F.,Sachsisches Landesamt fur Umwelt Landwirtschaft und Geologie
WasserWirtschaft | Year: 2014
At the Lachsbach in Saxony, a salmon monitoring for the success checking of resettlement and stocking measures is being conducted by the Saxon State Office for the Environment, Agriculture and Geology with the help of an infrared fish counter (Vaki Riverwatcher). The system delivers in addition to regular fishing, reliable data on the annual numbers of ascents in the Elbe tributary since 2007.