Fig. 1 Overview of the tile-drained field plot at the Lovinkhoeve. The thick lines indicate a series of piezometers, the thick dots represent groundwater level observation wells. The position of the automated observation well is also shown. The numbers at the top indicate the blocks at different distances from the drain. The roman numerals at the right hand side indicate the different instrument transects. Location M corresponds to the end of the experimental field; location D is the position close to the ditch