! C_CH4 start
! 5.5 17/02/03    Required for large-scale hydrology L_TOP code.
!                 Used in calculation of methane flux from wetlands.
!
      REAL,PARAMETER :: T0_CH4 = 273.15               ! T0 value
      REAL,PARAMETER :: Q10_CH4 = 3.7                 ! Q10 value
      REAL,PARAMETER :: CONST_CH4 = 7.41E-12          ! Scale factor
!
! C_CH4 end