You'd be *very* surprised what shapes fish passes can take. I don't think it's a good idea to use the waterway key to tell that whatever feature is intended to be a fish pass. This one, although man made is definitely a river, that was built as 1) a fish pass, 2} a whitewater course. https://www.openstreetmap.org/#map=17/45.84919/5.41420
Le 19 juillet 2018 10:43:23 GMT+02:00, Martin Koppenhoefer <dieterdre...@gmail.com> a écrit : > > >sent from a phone > >> On 19. Jul 2018, at 10:22, Javier Sánchez Portero ><javiers...@gmail.com> wrote: >> >> Could a fish pass look like a short and very narrow canal like the >images in this pages? >> >> https://en.wikipedia.org/wiki/Levada >> https://es.wikipedia.org/wiki/Acequia > > >it is not so much about what it looks like, but about the purpose it >was built for. Are fishes using those canals? > >Often (?) they might provide kind a steps so greater heights can be >passed: >http://www.htsbau.de/.cm4all/iproc.php/Button/FAH%20technisch.jpg/downsize_1280_0/FAH%20technisch.jpg > >http://de.academic.ru/pictures/dewiki/70/Fischtreppe_Isar_bei_Pullach.jpg > >wikipedia has a lot of examples as well: >https://en.m.wikipedia.org/wiki/Fish_ladder > >Cheers, >Martin
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