!     -----------------------------------------------------------------
!     file 'm1sim.inc'

!     This block common is contains variables used for a simulation run
!     for MAIN.

!     + + + VARIABLE DECLARATIONS + + +

      integer          ntstep
      integer          am0jd
      real             amalat
      real             amalon
      real             amzele

      common /m1sim/                                                    &
     &                 am0jd, ntstep,                                   &
     &                 amalat, amalon, amzele

!     + + + VARIABLE DEFINITIONS + + +

!     ntstep  - Number of timesteps per day for erosion.

!              range values      min       max
!              ------------   ---------  ---------
!              fixed              1        96
!              typical           24        24
!              ------------   ---------  ---------

!            - This variable contains the number of timesteps
!              per day for which erosion is calculated.

!     am0jd  - Current julian day of simulation

!              range values      min       max
!              ------------   ---------  ---------
!              fixed              1      variable
!              typical         variable  variable
!              ------------   ---------  ---------

!            - This variable contains the current julian day
!              the simulation run.

!     amalat - Latitude of simulation site (degrees)

!              range values       min        max
!              ------------   ---------  ---------
!              fixed            0.00      90.00
!              typical         15.00      75.00
!              ------------   ---------  ---------

!            - This variable contains the latitude of
!              simulation site.

!     amalon - Longitude of simulation site (degrees)

!              range values       min        max
!              ------------   ---------  ---------
!              fixed            0.00      360.00
!              typical         70.00      170.00
!              ------------   ---------  ---------

!            - This variable contains the longitude
!              of simulation site.

!     amzele - Average site elevation (m)

!              range values       min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------

!            - This variable contains the average value of elevation
!              relative to sea level for the site.

!-----------------------------------------------------------------------