https://www.openstreetmap.org/changeset/145644343 for the first spring (fit lidar and official data)

There's also a wetland in the area and it's descibed in 2 info boards. 

environnement.brussels (wfs layer) give the 2 other springs more on nord of the one i created but did'nt explore this zone yet. 

First sequence do document future changeset here : https://www.mapillary.com/app/?pKey=670426328577676