]> 2026-04-13T15:37:22+00:00 Case study:Wettingen, nature-like fish pass 500 en Approved No No Yes false Limmat fishway plan.JPG River Limmat plan.JPG Wettingen limmat1.jpg River Limmat hydropowerplant.JPG Nature-like bypass channel: River Limmat, Wettingen (photo: Walter Binder) Downstream section of the River Limmat (photo: Walter Binder) Rock-cascade fish pass on River Limmat (photo:Pinja Kasvio) River Limmat, hydropowerplant (photo: Pinja Kasvio) No 47.456879764509,8.3211833238602 Walter Binder ,, ,,, 5942 The nature-like bypass channels middle part has a rock-cascade pass. (photo by Pinja Kasvio) Wettingen limmat2.jpg Complete In Wettingen there is a great example of a small nature-like bypass channel at the weir Wettingen on the Limmat downstream from Zurich which surmounts the very big height of 18.30 m. Nature-like bypass channels total length is 620 m, discharge 0.4 m³/s and additional attraction water is 0.6 m³/s. Total difference in water level is 18.30 m with high mean slope 3 %.The lower section consists of a technical fish. Whereas a near-nature water course was formed in the upper section, a rocky-cascade fishway with a height of 10 meters surmounts the biggest part of the altitude. Due to the limited space the lower section consists of a vertical-slot-pass which is converted into a collection-gallery at the power house. Leading back the water course to the power house is not possiblewhen it comes to bigger bypass channels. Splitting the water into two branches offers a good solution for this small channel. The main branch continues towards the tailwater as a near-nature water course and ends further downstream, where a connection to the natural river bed is possible. The smaller second branch diverts from the main branch towards the power house and is formed as a vertical slot-pass. The nature-like bypass channel has a trail on its side, so the residents can enjoy the lovely scenery and see some trouts when passing by. Wettingen, nature-like fish pass wettingen, nature-like fish pass No Economic aspects Fisheries Hydropower 2013-07-03T10:55:15Z 2456476.9550347 2013-09-26T11:02:04Z 2456561.9597685 Wettingen, nature-like fish pass