all second-level commands in block > PARAMETER or > OBSERVATION referring to source names.
all fourth-level commands in block > PARAMETER or > OBSERVATION, respectively
This command reads one or more sink/source code names as specified in the TOUGH2 block GENER. Both parameter and observations may refer to sources. Sources are designated by a three-character/two-integer code name (TOUGH2 variables SL and NS; FORTRAN format: A3, I2). Blanks in the names as printed in the TOUGH2 output file must be replaced by underscores (e.g., a source name specified in the TOUGH2 input file as 'B 007' is printed as 'B 0 7' in the TOUGH2 output file. Therefore, it must be addressed in the iTOUGH2 input file as 'B_0_7'). Multiple names can be specified. A sequence of iplus sources can be generated by increasing the number of the last source code name. The following two command lines are identical:
>> determine ENTHALPY of injected fluid...
>>> SOURCE: WEL_1
<< ... based on... > OBSERVATION
>> ... the total VAPOR PRODUCTION in the extraction wells
>>> SINK : EXT_1 + 3
>>>> DATA on FILE : steam.dat
>>>> RELATIVE error: 10 %