Development of the 2-Chamber-Organismbypass

test facility of the 2-Chamber-Organismbypass

status of development


Pilot plant

In the end of 2018 the first pilot plant was built and installed in the river Alm in Upper Austria supported by FFG and 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 110 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 the end of February the renovation works at the dam will be finished and a function monitoring will be implemented.

The pilot plant was built out of steel and was produced by the company K.u.F. Drack.

Research project

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

commisioning of the test facility

Further support for realization of the test facility came from the companies HOBAS and MAX Lochboden, thank you very much!