Case study:Wyhlen, nature-like pool pass and fish lift

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Location: 47° 32' 21.62" N, 7° 42' 28.95" E

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Project overview

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Status	Complete
Project web site
Themes	Economic aspects, Fisheries, Hydropower
Country	Germany
Main contact forename	Rolf-Jürgen
Main contact surname	Gebler
Main contact user ID	User:Kasvio
Contact organisation
Contact organisation web site
Partner organisations	Rhein Kraftwerk
Parent multi-site project
This is a parent project encompassing the following projects	No

The fish can migrate upwards by the nature-like pool pass. (Photo by Pinja Kasvio)

Project summary

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The cantonal city of Basel and the Kraftübertragungswerke Rheinfelden built the Augst-Wyhlen barrage between 1908 and 1912. The plant consists of the Wyhlen power plant on the German bank of the Rhine and the Augst power plant, as well as the jointly managed weir and watergate on the Swiss bank of the river.

Wyhlen hydropower plant gives discharge to the fish way 800 l/s. The attraction flow is 1 m3/s. For the small turbine there has been installed the nature-like pool pass. Now the fish have the possibility to migrate to the upper streams from both sides of the River Rhein in Wyhlen. Fish lifts was constructed year 2005. The hight is 16,75 m. The dimension of the fish cage is 2,5x2,5x1,5 m (volume of the tank is 2,15 m3). The operating discharge is 1,2 m3/s and the operating interval is 1 to 3 hours.

At Wyhlen Ryburg-Schwörstadt there is also a new bypass under contruction. Total length will be 1 150 m. And the total difference in height is 10,7 m. Discharge will be 3,0–6,0 m3/s (small turbine 4,5 m3/s, in total 6 m3/s).

And close to the new bypass there is a new fish way under construction also. Discharge to the new fish way will be 800 l/s and the attraction flow 600 l/s. There will be two entrances to the fish way (one near the turbines and one further).

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Image gallery

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Fish lift (photo: Pinja Kasvio)

Fish can migrate upwards with fish lift in Wyhlen (photo: Pinja Kasvio)

New bypass for the fish is under construction (photo: Pinja Kasvio)

Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present Species of interest Dominant hydrology Dominant substrate River corridor land use Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) Project started Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information