Dewatering depth current climate

The dewatering depth map with the Average Highest Groundwater Level (GHG) calculated by the National Water Model refined with the elevation map at 0.25 m² (AHN3). The maps thus present the groundwater level in meters below ground level, scaled back to 0.25 m² for the current climate (2019). The GHG are currently calculated using the National Water Model (www.nhi.nu) for the KNMI scenarios. The calculation cell-size is 250*250m; the view refers to groundwater levels relative to an average ground level height for these computational cells. In the first step, the GHG of the NWM is refined, so that the soil storage can be determined at a higher level of detail and the dewatering depth map is made (GHG min ground level). This is via: 1) The calculated groundwater level between the cells to be interpolated linearly. 2) The ground level height of the AHN3 (mower field) to be used for sophistication of groundwater levels relative to ground level