Xlsc (surface mixing length scale constant)
For the Generic Length Scale (GLS) turbulence closure (Umlauf and Burchard, 2003) in SCHISM, the mixing length ($l$) at free surface is
$l=\kappa d_s$, (Zhang and Baptista, 2008)
where
When wind wave module is not invoked, this parameter scales the surface mixing In the latest SCHISM version (v5.6),