HPx

One-dimensional transport calculations

Profiles  with different geochemical variables at selected times on one plot are made by

       -fig_type profile

By default, the distance is the Y-variable. Following option will plot the distance along the X axis:

       -fig_type profile flip

Selection of the times

The selection of the times for which the data is added to the curve is with the -fig_multi identifier. The selection of the times is the first input of the identifier. 

Multiple times and variables on one plot

By default, a plot is made for each print time. The identifier -fig_multi allows also to indicate if a single plot is made with different variables and different print times when single is indicated 

       -fig_multi l2,4 single

This plot consists of different variables at print times 2 and 4. Note that the first input cannot be omitted. Further options for the single plot are listed below.

Format of the dependent variable (distance)

The format of the dependent variable can be changed as:

• Numerical transformation in which _THIS is replaced by the value:

       -fig_multi l2,4 profile transform "-_THIS"

• The label of the independent variable

       -fig_multi l2,4 profile label "Distance below the soil surface"

• The unit of the independent variable

       -fig_multi l2,4 profile unit "centimeter"

Options for the single plot

Options are added to the -fig_multi identifier after the input for selecting the times and when single is in the list as well.

With group, the outer and inner loops are defined:

       -fig_multi l2,4 single group profiletimes

-fig_multi l2,4 single group independent

-fig_multi l2,4 single group variables

The first line will use the times in the outer loop and the variables (-fig_curve and -fig_curves) as an inner loop. The second line does the same (indicating that the independent variable is used as the outer loop)

The third line will use the variables as the outer loop and the times as the inner loop.

profiletimes and variables determine the curve property that will make the distinction. Color, dash and marks will, respectively, change color, dashtype and pointtype between the different curves in a group. For example:

       -fig_multi l2,4 single profiletimes color 1 variables dash 1

will use different colors between the times (starting with the color of linetype 1), and different dash types for the between the different variables (starting with dashtype 1)

If another unit is to be used for the dependent variable, the unit can be added to profiletimes:

       -fig_multi l2,4 single profiletimes color 1 "d"

       -fig_multi l2,4 single profiletimes "d"

The first option adds a string variable after the indicators for the curves options; the second options only defines the unit, and keep the curve options to their default settings. A second profiletimes can be added with only the curve options.

 

The keyentry input will simplify the key entries by grouping the outer loop as subtitles in the legend.

       -fig_multi l2,4 single keyentry "{/:Bold _LABEL}"

The subtitle format between quotes is optional. In this example, enhanced text mode is used to have bold subtitles (see gnuplot manual for the format). _LABEL is replaced by the key of the outer loop (print times or variables).

Examples

The figures below are made for the example with a three layered soil profile initially having a cation exchange complex in equilibrium with a Na-K-Cl solution and leached with a Ca-Cl solution - see 

The calculated molalities of the exchange species (NaX, KX, and CaX2) are transformed to mmol/kg soil (in USER_PUNCH with headings NaXm, KXm and CaX2m). For two print times (print time 1 and 2, corresponding to 25 and 50 days), a combination plot with the three transformed variables is defined.

Hereafter, different options are illustrated. Following general settings are used