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Similar to the Id's used, a warning level integer can be assigned to threshold crossings. This warning level is resolved to either an icon (for display in the main FEWS GUI), or a colour (for use in reports or schematic status displays). Warning levels need not be unique. If not specified this id will be generated automatically. Internally DELFT-FEWS maintains threshold events as a non-equidistant time series, where the crossings are identified by an integer. For each threshold two unique integer Id's need to be assigned. One ID is used to identify the upcrossing of the threshold, the other Id is assigned to identify the downcrossing. The exception to this is the peak threshold where only a single Id needs to be assigned to identify the occurrence of the peak event. Note: in the new thresholds configuration approach (thresholdGroups) these ids are optional and will be generated when not specified in configuration.
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Run Threshold Event Crossing activity in workflow (2013.02 and later):
The TresholdEvenCrossing ThresholdEventCrossing module is replaced by a predefined activity. This predefined activity has the same functionality as the old ThresholdEvent module. You can add the following predefined activity to your workflow:
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