hgprieto

Syntax >>>> VARIANCE: sigma2 Parent Command all third-level commands in block > PARAMETER and > OBSERVATION Subcommand – Description (see >>>> DEVIATION (p/o)) Example (see >>>> DEVIATION (p/o)) See Also >>>> DEVIATION (p) | >>>> DEVIATION (o)

Syntax >>>> VALUE Parent Command all third-level commands in block > PARAMETER Subcommand – Description This command selects the estimation of the parameter value as opposed to its logarithm (see command >>>> LOGARITHM (p)) or a multiplication factor (commands >>>> FACTOR (p) and >>>> LOG(F)). Example > PARAMETER >> parameter of RELATIVE permeability function >>>

Syntax >>>> UNIFORM Parent Command all third-level commands in block > PARAMETER Subcommand –   Description This command generates uniformly distributed input parameters for Monte Carlo simulations. Parameter values are sampled between the lower and upper bound specified by command >>>> RANGE. Example > PARAMETER >> RELATIVE permeability function >>> DEFAULT >>>> PARAMETER RPD(: 1)

Syntax >>>> TRIANGULAR Parent Command all third-level commands in block > PARAMETER Subcommand –   Description This command generates random input parameters following a triangular distribution for Monte Carlo simulations. Parameter values are sampled between the lower and upper bound specified by command >>>> RANGE; the mode is given by command >>>> GUESS. Example >

Syntax >>>> STEP: max_step Parent Command all third-level commands in block > PARAMETER Subcommand – Description This command defines the maximum allowable step size, limiting the change in the corresponding parameter per iTOUGH2 iteration. Large steps are usually proposed for a parameter if (i) the initial guess is far away from the best estimate; (ii)

Syntax >>>> PARENT: parent_ID/parent_annotation >>>> TIED TO: parent_ID/parent_annotation >>>> RELATED TO: parent_ID/parent_annotation Parent Command all third-level commands in block > PARAMETER   Subcommand –   Description This command ties the parameter to a parent parameter. The parameter gets its updated value from the parent parameter, which is identified by its sequence number (parent_ID) in block

Syntax >>>> RANGE (LINEAR): lower upper or >>>> BOUND: lower upper Parent Command all third-level commands in block > PARMETER Subcommand –   Description This command sets the admissible parameter range. It provides lower and upper bounds of the parameter. During the optimization process, iTOUGH2 may suggest parameter values that are physically not valid (e.g.

Syntax >>>> PRIOR: prior_info Parent Command all third-level commands in block > PARAMETER   Subcommand –   Description This command provides the prior information of the parameter to be estimated. If command >>>> PRIOR is omitted, the value from the TOUGH2 input file is taken. Prior information is only effective if a standard deviation is

Syntax >>>> PERTURB: (-)alpha (%) Parent Command all third-level commands in block > PARAMETER   Subcommand –   Description This command specifies the perturbation factor alpha for numerical computation of the Jacobian matrix. The columns of the Jacobian matrix are calculated by perturbing the corresponding parameter p by a small amount dp, and taking either

Syntax >>>> PARENT: parent_ID/parent_annotation >>>> TIED TO: parent_ID/parent_annotation >>>> RELATED TO: parent_ID/parent_annotation Parent Command all third-level commands in block > PARAMETER   Subcommand –   Description This command ties the parameter to a parent parameter. The parameter gets its updated value from the parent parameter, which is identified by its sequence number (parent_ID) in block