In summer 2019 the second pilot plant was built and installed at the river Aschacharm in Upper Austria supported by FFG and BOKU. The river is a habitat for barbels and over 20 other species. The FISHCON- lock overcomes a head of approximately 1.5 m and is operated with a leading water flow of 125 l/s. This leads to a waterflow reduction of around 50% in comparison to a standard fish pass in this fish region. The saved water can be used the whole year at the installed hydropower plant.
A fish-monitoring could show, that more than 5.300 fishes from over 27 species used the FISHCON-lock for their upstream migration. Among them some fish swarms and weak swimming species. Because of these good results, a positive evaluation according to the Austrian regulation was possible.
In the end of 2018 the first pilot plant was built and installed at the river Alm in Upper Austria supported by FFG and the university BOKU. The river is a habitat for river trout’s and graylings having a length up to 50 cm. The FISHCON-fish lock overcomes a head of approximately 2 m and is operated with a leading water flow of 100 l/s. This leads to a waterflow reduction of around 50% in comparison to a standard fish pass in this fish region. The saved water can be used the whole year with an installed residual flow hydrodynamic screw.
In 2019 the function of the pilot plant was evaluated with a video-monitoring. In the investigation period of 104 days 683 upstream-migrations and 305 downstream-migrations at the 2-Chamber-Organismbypass from FISHCON could be documented. All present fish species used the innovative fish lock. Due to the very positive result, the pilot plant has been evaluated as fully functional with the grad 1.0 according to Austrian guidelines!!!
The pilot plant was built out of steel and was produced by the company K.u.F. Drack.
The feasibility study “ecological and economical potential analysis of the 2-Chamber-Organismbypass with first practical examination” evaluates scientifically the technology for the first time. The project was founded by the Austrian “Klima- und Energiefond”. For this purpose a true to scale model was built and practical tests were carried out. Also various calculations and analysis were implemented, in order to determine the potential for application of this new technology. The results of the research project are promising. At multiple tests with trouts an upstream and downstream migration was observed under experimental conditions.
test with fishes
operation of the test facility
commissioning of the test facility
Further support for realization of the test facility came from the companies HOBAS and MAX Lochboden, thank you very much!