Taking Account of Prior Uncertainty in Model Factors


The choices made in effecting the procedural model will normally involve the choice of scale and resolution at which the calculations will be made. For the nonlinear equations common in environmental modelling problems, the sensitivity of solutions to space and time resolution can generally only be estimated locally, but it can be expected that there will be an interaction between scale and resolution and the ''effective'' values of the factors required by a model . This issue has to our opinion not been properly addressed in the literature, but more experience and archiving of modelling applications will be needed to allow estimates of prior distributions of effective values of parameters of different types to be made.
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