Key Data of the Screen Systems at the Willstätt, Unkelmühle, Kemnade and Öblitz Hydropower Sites

Examples of screen bar shapes for fish protection screens at hydropower sites

Publication: Infographic
Citation: Ecologic Institute 2021: Key data of the screen systems at the Willstätt, Unkelmühle, Kemnade and Öblitz hydropower sites. Infographic published in: Keuneke, Rita 2021: Technical functionality of large fish protection screens confirmed in practice. Operational experience with large screen systems. Aachen: Ingenieurbüro Floecksmühle GmbH.

To obtain information on the technical functioning of the realised sites, interviews were conducted with the operators of four sites (2020). The experiences are extremely site-dependent. This infographic presents the key data of the screen systems at the Willstätt, Unkelmühle, Kemnade and Öblitz hydropower sites. The infographic is part of the fact sheet "Technical Functionality of Large Fish Protection Screens Confirmed in Practice."

The infographic is published under a creative commons license CC BY 4.0. That means it can be copied and redistributed in any medium or format and for any purpose as long as appropriate credit to the authors (Ecologic Institute, Ingenieurbüro Floecksmühle GmbH, Aachen) is given.

Technical functionality can be guaranteed for all realised screen types and sizes

Forum Fischschutz und Fischabstieg: Ergebnisse und Ausblick

Abschlussbericht

Year 2023

Publication:Infographic

This infographic shows, color-coded for the three developmental stages of domestic fish, body proportion-based bar spacing of rakes that can prevent fish from swimming into the high-risk areas.

Body Proportion Based Bar Spacing for Racks to Prevent Fish Passage into High-risk Areas

Year 2023

Publication:Report

This report summarizes the results of the Hydromorphology workshop series (2008, 2012, 2016, 2021) of the German Federal Environment Agency in the form of a synthesis.

In der Diskussion: Hydromorphologie.

Ergebnisse der UBA Workshopreihe

Year 2023

Publication:Infographic

Infographic on Overview of concrete fish conservation measures and targets in German federal states

This illustration provides an overview of concrete fish conservation measures and targets in German federal states. It is part of a fact sheet on fish protection and downstream fish migration measures.

Überblick über konkrete Fischschutzmaßnahmen und -ziele in deutschen Bundesländern

Year 2020

Publication:Infographic

The illustration exemplifies the derivation of the study parameters in field studies for the determination of the site injury rate. It is part of a fact sheet on fish protection and downstream fish migration measures.

Derivation of the Study Parameters in Field Studies for the Determination of the Site Injury Rate

Year 2020

Publication:Infographic

Infographic on group and individual approach to quantifying passage-related injuries in a hydropower site.

This illustration shows the group and individual approach to quantifying passage-related injuries at a hydropower site. It is part of a fact sheet on primary injury to fish at hydropower sites.

Group and Individual Approach to Quantifying Passage-related Injuries at a Hydropower Site

Year 2020

Publication:Infographic

This illustration shows a comparison of the injuries of a common Nase before and after the passage of a hydropower site. It is part of a fact sheet on primary injury to fish at hydropower sites.

Comparison of the Injuries of a Common Nase Before and After the Passage of a Hydropower Site

Year 2020

Publication:Infographic

Infographic on advantages and disadvantages of using naturally downstream migrating fish or an experimental approach to determine the mortality and injury risk

This illustration shows advantages and disadvantages of using naturally downstream migrating fish or an experimental approach to determine the mortality and injury risk. It is part of a fact sheet on primary injury to fish at hydropower sites.

Advantages and Disadvantages of Using Downstream Migrating Fish or an Experimental Approach to Determine the Mortality Risk

Year 2020

Publication:Infographic

This infographic provides an overview of the Measures for fish protection and downstream fish migration in Europe. The infographic is part of a fact sheet on fish protection targets in Europe.

Measures for Fish Protection and Downstream Fish Migration

Year 2020

Languages: German

English
Credits: Media format: coloured infographic for a digital fact sheet
Copyright: CC BY 4.0
Content: Rita Keuneke (Ingenieurbüro Floecksmühle GmbH)
Graphic design: Lena Aebli
Funding: German Environment Agency (UBA), Germany
Published in: Fact Sheet 04: Technical Functionality of Large Fish Protection Screens Confirmed in Practice
Published by: Ecologic Institute, Germany

Ingenieurbüro Floecksmühle, Germany
Year: 2021
Project: Third Cycle of the German Participatory Forum on Fish Protection and Downstream Migration
Project ID: 3581
Keywords: Biodiversity

Communication

Water

Water Framework Directive, WFD, river, nature conservation, biodiversity, energy, hydropower, fish, migration, watercourse, connectivity, restoration, hydromorphology, protection

Europe, Germany, Austria, Switzerland

infographic, visualization, illustration, creative commons, fact sheet

Further Links

PublicationInfographicFish Protection Screens in Germany with Currently Highest Discharge per Screen Panel

Ecologic Institute & Ingenieurbüro Floecksmühle 2021 | CC BY 4.0

As a result of intensive and ongoing discussions in the German Participatory Forum on Fish Protection and Downstream Migration, a mutual understanding was reached in 2014, up to which screen size a functioning mechanical fish protection and bypass system including the... Read more

Ecologic Institute 2021: Fish protection screens in Germany with currently highest discharge per screen panel. Infographic published in: Keuneke, Rita 2021: Technical functionality of large fish protection screens confirmed in practice. Operational experience with large screen systems. Aachen: Ingenieurbüro Floecksmühle GmbH.

PublicationInfographicFlow-optimised Screens Serve Fish Protection and Power Production

This infographic shows different cleaning elements of the screen cleaning machine, that can either be designed as rakes that grip between the bars, or as brushes or polymer strips that rather sit on the outside of the bar and brush along it.

Ecologic Institute & Ingenieurbüro Floecksmühle 2021 | CC BY 4.0

This infographic shows examples of screen bar shapes for fish protection screens at hydropower sites. Small screen bar spacing for better fish protection also causes the screen to become clogged with debris more quickly, which can impair the operation of the hydropower... Read more

Ecologic Institute 2021: Flow-optimised screens serve fish protection and power production. Examples of screen bar shapes for fish protection screens at hydropower sites. Infographic published in: Keuneke, Rita 2021: Technical functionality of large fish protection screens confirmed in practice. Operational experience with large screen systems. Aachen: Ingenieurbüro Floecksmühle GmbH.