Environmental Engineering Reference
In-Depth Information
Table 9.2
Problem scales and model chains in SEAMLESS-IF
Extent
Resolution
Model chain
11
Regional
AEnZ
FSSIM-AM/APES/FSSIM-MP
EU25
Farmtype
CAPRI/EXPAMOD/FSSIM-MP/FSSIM-AM
Farmtype
AEnZ
FSSIM-AM/APES
reported in Table
9.2
are foreseen, but more can be added, thanks to the extensibility
of the proposed approach.
Detailed Specification of Experiments
A project may encapsulate several experiments. Each experiment corresponds
to a single run of the model chain. All experiments in the same project refer
to the same model chain, as the latter is implied by the scales of the problem.
An experiment consists of three parts: the
Outlook
, that defines the trends of the
envisioned future, the
Context
that specifies the boundaries of the problem and
is specific to the biophysical subchain, and the
Policy option
that defines the
conditions for the policy assessment subchain. In Fig.
9.12
we display, as example,
the policy option panel.
Chain Execution, Server-Side Queuing Model Execution
and Client-Side Monitoring
When the modeller has completed the configuration of a model chain (that is, of the
experiment), s/he can start its execution. This adds the newly configured model
chain to the queue of the model chains to be executed on the server. SeamServer
provides the queuing facility. The end-user may monitor the queue on his/her client
and see which model chain is next to be executed. When an experiment arrives to
the top of the queue, it is retrieved by the (one of the) processing environment(s)
that executes it on a server. The model chain type is retrieved from the experiment,
instantiated, initialized with the experiment and executed. While models of the chain
are finishing, intermediate results and indicator values are linked to the experiment.
When the chain is finished, it links the final results to the experiment. As the results
are attached to the experiment, they can be visualized with SeamPRES, a component
of the SeamGUI application.
11
Model name abbreviations: FSSIM - Farm System Simulator, FSSIM-AM - the Agricultural
Management part of FSSIM; FSSIM-MP - the Mathematical Programming part of FSSIM,
SEAMCAP - a SEAMLESS version of the 'Common Agricultural Policy Regionalised Impact
analysis' model, APES - Agricultural Production and Externalities Simulator.
