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WRF can't identify lake class in wrfinput file

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I see that the index file of "modis_landuse_20class_30s_with_lakes" (which is set as default in namelist.wps) points to "MODIFIED_IGBP_MODIS_NOAH", and "MODIFIED_IGBP_MODIS_NOAH" has no lake class parameters in LANDUSE.TBL and VEGPARM.TBL...this also confuses me, because without lake's parameters, real.exe will change lake class to water class in wrfinput file.

how to solve this problem?
REAL handles the lake issue based on sf_lake_physics option. When this option is turned on, the landuse type of lake is used to determine lakemask, and the lake physics module will be called later when wrf.exe starts. If the sf_lake_physics is turned off, REAL will reset lake points to water points and these points will be treated the same as ocean water points in wrf.exe run. This its why no specific parameters are given to 'lake' in LANDUSE.TBL and VEGPARM.TBL.