Digitaal Hoogtemodel Vlaanderen II, multidirectionale hillshade 0,25 m show a flow from the spring node  until the begining of the meadow before going north and on aerial you can show the place indicated by the article https://www.mapillary.com/app/?pKey=1400879467403851 (indicate the position) before being canalised on the meadow. and going back on "air" after the track 

GRB give 2 "water line"  so it's possible that's 2 differents spring but i can attest by certitude.