HydroGeoSphere/Solute Mass Balance

Sample solute mass balance output
By default, solute mass balance information for each species is computed at each time step and written to the prefixo.lst file. Figure 5.18 shows some sample output as it appears in the .lst file:


 * Figure 5.18: Sample Mass Balance Information for Example PM CD

No solute mass balance
This instruction prevents solute mass balance information from being written to the listing file.
 * &bull; &bull; &bull;

This detailed mass balance information is also written to a TECPLOT formatted ascii output file called, for example, prefixo.mass_balance_species_001 so that it can be easily visualized.

Summary mass balance information
Summary mass balance information is written to a TECPLOT formatted ascii output file called, for example, prefixo.mass_balance_summary so that it can be easily visualized. For each timestep in the transport solution, one line per species is written to the file. Each line has columns labelled as follows:


 * 1) time Simulation time.
 * 2) Tmass Total mass in the system.
 * 3) dBoundary Change in mass due to sources and sinks.
 * 4) dStored Change in mass stored.
 * 5) dBoundary - dStored Error.
 * 6) (dBoundary - dStored)/Tmass*100) Normalized error.
 * 7) Species Species number.

Besides being plotted with TECPLOT, such output can be imported into an editor (e.g. Microsoft Excel) and sorted to facilitate, for example, the creation of a plot of mass balance error versus time for a given species.

Cumulative mass balance information
Cumulative mass balance information is written to a TECPLOT formatted ascii output file called, for example, prefixo.mass_balance_cumulative so that it can be easily visualized. For each timestep in the transport solution, one line per species is written to the file. Each line has columns labelled as follows:


 * 1) time Simulation time.
 * 2) In (cumulative) Mass in since start of simulation.
 * 3) Out (cumulative) Mass out since start of simulation.
 * 4) Stored Change in mass stored since start of simulation.
 * 5) In+Out-Stored Error.
 * 6) Species Species number.

Besides being plotted with TECPLOT, such output can be imported into an editor (e.g. Microsoft Excel) and sorted to facilitate, for example, the creation of a plot of mass balance error versus time for a given species.