I do agree Visbeek is a weird ditch.  Geodata BXL shows the Visbeek.  
https://geodata.environnement.brussels/client/view/22713aac-e03d-4a18-b0eb-c71f3ca55db1/feature/64f9cdbf-c637-4eeb-bbd3-bb31cb968d58/306
Vleesgracht is part of the waistwater /sewer system now.
