BL_INTCT --|
           |-- Z
           |-- SF_EXPL --|
           |             |-- Z
           |             |-- HEATCON
           |             |-- BOUY_TQ
           |             |-- SF_EXCH --|
           |                           |== SF_OROG
           |                           |== SF_RESIST
           |                           |== SF_RIB
           |                           |== FCDCH
           |                           |== SF_FLUX
           |                           |== STDEV1
           |                           |== SFL_INT
           |-- BDY_EXPL --|
           |              |== Z
           |              |-- BOUY_TQ
           |              |-- BTQ_INT   
           |              |-- KMKH --|
           |              |          |== EX_COEF
           |              | 
           |              |-- EXFLUXTQ
           |              |== EXFLUXUV
           |              |-- IM_BL_PT1
           |
           |-- SF_IMPL --|
           |             |-- IM_SF_PT
           |             |-- SF_EVAP
           |             |-- SF_MELT
           |             |-- SICEHTF
           |
           |-- BDY_IMPL --|
                          |-- IM_BL_PT2