Koen Zuurbier is a researcher on the Geohydrology team. At KWR, he works on underground solutions for fresh water provision, also referred to as Subsurface Water Solutions. This entails the storage and recovery of freshwater (aquifer storage and recovery), salinisation prevention at collection wells and the use of brackish water. His main expertise includes infiltration and extraction wells, the development of groundwater quality around wells, and the actual realisation and launch of Subsurface Water Solutions with end users and installers. Koen Zuurbier completed his PhD in 2016 at Delft University of Technology with his dissertation titled ‘Increasing Freshwater Recovery upon Aquifer Storage’. He works mainly on the projects Subsol, DESSIN and GO-Fresh as well as on the further development of Subsurface Water Solutions.