Regarding free-surface elevation post-processing in DualSPHysics
Looking at the post-processing guide I observe that the method is basically done using a mass estimation:
And this makes complete sense. Looking at some of the files in DualSPHysics "others" -> "GaugeSystem" -> "GSwl_Dam2d.xml", I see:
How come the value is advised as 0.4 for 2D simulations?