diff --git a/srcF/sfx_surface.f90 b/srcF/sfx_surface.f90
index 8da1f64640217878277a8f526b6ca36447423ead..f1610df178a3b2424e5e807aa3eaf4beb42d6990 100644
--- a/srcF/sfx_surface.f90
+++ b/srcF/sfx_surface.f90
@@ -99,19 +99,19 @@ module sfx_surface
     integer, public, parameter :: ocean_z0m_id = z0m_ch     !< ocean surface
     integer, public, parameter :: land_z0m_id = z0m_map_id        !< land surface
     integer, public, parameter :: lake_z0m_id = z0m_map_id        !< lake surface
-    integer, public, parameter :: snow_z0m_id = z0m_map_id       !< snow covered surface    
+    integer, public, parameter :: snow_z0m_id = z0m_ow       !< snow covered surface    
     integer, public, parameter :: forest_z0m_id = z0m_map_id     !< forest csurface  
     integer, public, parameter :: usersf_z0m_id = z0m_map_id      !< user surface  
-    integer, public, parameter :: ice_z0m_id = z0m_map_id       !< ice surface  
+    integer, public, parameter :: ice_z0m_id = z0m_ow       !< ice surface  
 
 
     integer, public, parameter :: ocean_z0t_id = z0t_kl_water     !< ocean surface
     integer, public, parameter :: land_z0t_id = z0t_mix        !< land surface
     integer, public, parameter :: lake_z0t_id = z0t_kl_water        !< lake surface
-    integer, public, parameter :: snow_z0t_id = z0t_mix         !< snow covered surface    
+    integer, public, parameter :: snow_z0t_id = z0t_ot         !< snow covered surface    
     integer, public, parameter :: forest_z0t_id = z0t_mix      !< forest csurface  
     integer, public, parameter :: usersf_z0t_id = z0t_kl_water      !< user surface  
-    integer, public, parameter :: ice_z0t_id = z0t_mix     !< user surface  
+    integer, public, parameter :: ice_z0t_id = z0t_ot     !< user surface  
     
     ! --------------------------------------------------------------------------------
     real, parameter, private :: kappa = 0.40         !< von Karman constant [n/d]