Estimating regional-scale fresh-brackish-salt groundwater distributions: challenges and recent advancements

Marc FP Bierkens1, Jude King1, Joeri van Engelen2, Jarno Verkaik3, Daniel Zamrsky1 and Gualbert Oude Essink2, (1)Utrecht University, Department of Physical Geography, Utrecht, Netherlands, (2)Deltares, Unit Subsurface and Groundwater Systems, Utrecht, Netherlands, (3)Deltares, Unit Subsurface and Groundwater Systems, Delft, Netherlands