Dear Konstantin,
For CLM it is difficult because you should change three files for make the change to get the effect. But for BATS I think you will find the impact very fast because there is just one file you can change the type. This file is the txt file LANDUSE which exists in your input folder with your ICBCs. For BATS do you make it as the following;
1. run the terrain then you will get the DOMAIN and LANDUSE files
2. modify the LANDUSE txt file as you wish
3. edit your
regcm.in (namelist) by make the following two lines ture;
fudge_lnd = .true., ! Fudging Control flag, for landuse of grid
fudge_lnd_s = .false., ! Fudging Control flag, for landuse of subgrid
fudge_tex = .true., ! Fudging Control flag, for texture of grid
fudge_tex_s = .false., ! Fudging Control flag, for texture of subgrid