Studies & guides
Guidelines
Guidelines for the construction of fish ladders 2021
Both Hydroconnect systems, the Electricity generating fish bypass as well as the fish ascent screw got listed as valid solutions and are state of the art.
Accompanying report (German)
Accompanying report for the guidelines for construction of fish ladders 2021
Both Hydroconnect systems, the Electricity generating fish bypass as well as the fish ascent screw got listed as valid solutions and are state of the art.
Fish-Monitoring
Research report: Fish monitoring on the Jeßnitz (2013) Screw turbine Walter Albrecht Chub-barbel-pike-Danube salmon-sneep-roach Experiment
- 2/3 of the fish that were used ascended (chub, barbel, pike, Danube salmon, sneep, roach)
- At least 1 fish of each species from 1.5 cm to 70 cm fish length
Visualisation: Descent and ascent statistics (German)
Visual representation of the fish ecological studies of the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant location (2014)
Fish ecological studies of the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant location (2014)
BOKU – University of Natural Resources in Vienna, Institute for Hydrobiology and Water Management
Guideline: Practical manual for environmentally aware use of turbine technologies in very-small-scale hydropower plants (German)
Guideline: Practical manual for environmentally aware use of turbine technologies in very-small-scale hydropower plants
- Description and assessment of 17 turbine technologies (Hydroconnect pg. 60)
- From the conclusion: “The design and use of technology in the fish-friendly dam and hydrodynamic screw with double rotating cylinders is to be rated as very positive. It can be seen in the development that the thought of protecting the fish was a high priority right from the start.
Manuela Reuter & Christian Kohout, IWSÖ Institute for Water Management, Urban Water Supply and Sanitation and Ecology (IWSÖ ) in Thuringia
Study: Preliminary trials of macro-zoobenthos
Study: Preliminary trials of macro-zoobenthos on the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant location (2014)
In the 3-day trial, 2271 macro-zoobenthos found their way up through the fish transport screw.
BOKU – University of Natural Resources in Vienna, Institute for Hydrobiology and Water Management
Study: Descent trial
Study: Descent trial of the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant in Lower Austria
Numerous fish of various kinds descended. All passed the screw injury free. Some of them also reascended.
BOKU – University of Natural Resources in Vienna, Institute for Hydrobiology and Water Management
Study: Electrical efficiency analysis
Study: Efficiency analysis and hydromorpical measurement of the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant location in Lower Austria
Alread at smaller plants electrical efficiencies of 65% and more are possible.
Bernhard Zeiringer
BOKU – University of Natural Resources in Vienna, Institute for Hydrobiology and Water Management
Fish ecological studies
Fish ecological studies of the “HYDROCONNECT” hydrodynamic screw with an “Albrecht fishLift inside” at the Jeßnitz power plant location (2014)
- continuous ascents registered during the entire operating period (Oct. 2013 to March 2014)
- The hydrodynamic screw from Hydroconnect is very well suited for fish descent
- various fish species descended and ascended
- no danger of injury for fish (upstream and downstream)
BOKU – University of Natural Resources in Vienna, Institute for Hydrobiology and Water Management