.. partable:: Overview of available keywords related to bed update numerics parameters

   frac_dz
     :advanced:
     :description:   Relative thickness to split time step for bed updating
     :units:         -
     :default:       0.7
     :range:         0.5 - 0.98
   merge
     :advanced:
     :description:   Merge threshold for variable sediment layer (ratio to nominal thickness)
     :units:         -
     :default:       0.01
     :range:         0.005 - 0.1
   nd_var
     :advanced:
     :description:   Index of layer with variable thickness
     :units:         -
     :default:       2
     :range:         2 - par\%nd
   nsetbathy
     :advanced:
     :description:   Number of prescribed bed updates
     :units:         -
     :default:       1
     :range:         1 - 1000
   setbathyfile
     :advanced:
     :required:
     :description:   Name of prescribed bed update file
     :units:         <file>
   split
     :advanced:
     :description:   Split threshold for variable sediment layer (ratio to nominal thickness)
     :units:         -
     :default:       1.01
     :range:         1.005 - 1.1