What is the WorkflowLooprunner?
To decrease the run time length the SOBEK model for the Rhine basin is only run for periods where the discharge at Lobith exceeds a given threshold. Respectively the SOBEK model for the Meuse basin is only run for periods where the discharge at Borgharen exceeds a given threshold. To achieve this a so called WorkflowLooprunner was configured in FEWS. There are two options to select the periods for which the SOBEK model shall be run. The first option is to define a threshold for a given time series. If this threshold is exceeded the SOBEK model will be run. The second option is to define the length of a time interval, e. g. yearly. In each time interval SOBEK is run for a defined time window around the maximum value.
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In the next two sections how to configure the different options in FEWS is explained.
Run SOBEK around the maximum value of a given period
In the Workflow LoopRunner the following things have to be defined:
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It is recommended to choose the time step size in such a way that the relative view period is a multiple of the time step size. If this is not the case, the last part of the relative view period is not taken into account, e.g. if the relative view period contains ten days and the time step size is three than the last day of the relative view period will be ignored in the WorkflowLoopRunner. Furthermore, choose an adequate time period before the maximum value, so that the model can simulate the peak sufficiently. Also keep in mind that the run time increases if the relative run window increases. Besides, one single SOBEK run must not be longer than 30 days, due to an internal setting in the SOBEK model.
Run SOBEK where the discharge exceeds a pre-defined threshold
In the Workflow LoopRunner the following things have to be defined:
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