This dialog shows the most commonly varied input control parameters in an R10 file.

The top line allows the user to define the starting time for the simulation (if a restart file is used this entry is not used) and the ending time may optionally be defined if the number of time steps is not set.

The entries on the two left hand panels are mostly self-descriptive.

The reference water level is that used in the vertical transformation as described in the user manual. It must be above all bed levels in the model.

The initial water level, salinity, temperature and sediment concentrations are not used when a model is restarted from a previous solution.

The user manual should be referred to for the options associated with the vertical turbulence model.

Interpretation of the number of iterations depends on the options selected in steady state and transient sections.

1 If the pure velocity/depth option is selected there the maximum number of iterations matches the input value in the table.

2 If a combination of velocity/depth and salinity, temperature or sediment is selected then a factor of 3 is applied to the input number. The model then applies two iterations of velocity/depth and one iteration for salinity, temperature or sediment as chosen in each cycle.

3 If velocity/depth, salinity and temperature are chosen then a factor of 4 is applied to the input number. The model then applies two iterations of velocity/depth and one iteration for salinity and then temperature in each cycle.

The middle section of page may be used to setup echo print options and activate

1 collapse to 2-D modelling (and thus be able to use the marsh option)

2 the mashing option with suitable parameters.

The right side is used to

1 select the equation solver to activate

2 select the horizontal turbulence model

3 select the 3-D approximation that can be 2-D, 3-D with a fixed number of equally spaced layers that vary with depth, or 3-D with more general layer spacing as defined in the user manual.