Manuel Waerder

To prepare my DEM and derive flow paths, I want to smooth it using the “Fill sinks (Wang & Liu)” tool. However, in my 20 km² urban catchment area (elevation range 31.17–53.33 m), the tool modifies large parts of the DEM far too strongly. This happens regardless of the “Minimum Slope” parameter: Example 1: Minimum Slope = 0.1 → Fill_sinks − DEM = 0 to 8.53 m Example 2: Minimum Slope = 0.000001 → Fill_sinks − DEM = 0 to 6.68 m The figures attached show my original DEM and the result of Fill Sinks with...