Hi Fabien, why have you joined the waterways you tagged as canals here to the water=river area of the river, and not to the river way itself? Most waterways in OSM start life as open ways with some never recieving a water=river area so based on my understanding it is important for the open ways to be connected to each other, then seperately the areas can be connected. Joining the open ways to the areas only may hinder connectivity analysis. Please reference the rivers OSM wiki page. --- I flagged a bridge that I modified to be mapped as a culvert, and changed the tagging of the waterway after the culvert to drain due to its reduced width.
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            Published using OSMCha: https://osmcha.org/changesets/166112952
            