Research - Research Projects

The Mainz-Kostheim hydropower plant was built between 2007 and 2009 at the last barrage of the Main River. From the beginning, the plant was equipped with various fish protection systems for fish ascent as well as for fish descent. However, the functionality of these fish protection facilities has been questioned by field investigations.

For this reason, the operators of the plant (WKW Staustufe Kostheim/Main GmbH & Co. KG – Stadtwerke Ulm and SWU Energie GmbH) commissioned investigations to improve the fish migration possibilities. The investigations were carried out in cooperation with PWP Ehingen Projektconsult and IUS – Institut für Umweltstudien Weibel und Ness GmbH.

Based on currently published experiences and recommendations, the study shows concrete measures for fish protection and descent, which are to be arranged in particular in the inlet area of the turbines. Selected variants of fish protection screens and bypasses were further investigated by means of targeted three-dimensional flow simulations at the department and their results were evaluated ethohydraulically. At the end of the investigations, a multi-field screen system was worked out in close coordination with the operator and the technical authorities (Darmstadt Regional Council), which can ensure the best possible fish protection and descent by means of mechanical fine screens and a bypass line, taking into account the local aspects and the operation of the power plant.

Further information in German can be found here (opens in new tab).