Input parameters for the

Each observation refers to one or more grid blocks, connections or sink/source terms in the **TOUGH2** model,
or is related to the entire model domain.
Time-dependent or steady-state data can be provided as lists in an arbitrary format.
Measurement uncertainties can be specified for each data set or individually for each data point.

The following is a partial list of available observation types (see the Command Index for a complete list):

- Pressure
- Gas pressure
- Liquid pressure
- NAPL pressure
- Capillary pressure

- Flow rates
- Total fluid flow rate
- Liquid flow rate
- Gas flow rate
- NAPL flow rate

- Saturation or phase content of a given phase
- Concentration or mass fraction or mole fraction of a given component in a given phase
- Temperature
- Pressure drawdown with respect to a reference pressure
- Flowing enthalpy
- Relative humidity
- Injection or production rate of a given phase in a well
- Cumulative injection or production rate of a given phase in a well
- First or second spatial moment of a given phase or component in the model
- Total mass or change of mass of a given phase or component in the model
- Total volume or change of volume of a given phase in the model
- Secondary parameters (relative permeability, viscosity, density, specific enthalpy)
- User-specified observation types
- Prior information

Parameters | Observations | Objective Function | Minimization Algorithm | Error Analysis

Examples | Bibliography | Availability | Updates | Command Index

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Page updated: July 25, 1997