| Product(s): | WaterSight |
| Version(s): | 10.00. |
| Area: | Documentation |
Comparing sensor data with modelled data
The uploaded WaterGEMS model will be running in WaterSight in real time, fed by real sensor measurements at the boundary conditions, if all configurations are properly set - see instructions here.
Once configured, it is also possible to directly compare measured data with modelled data in order to to check the accuracy of the hydraulic model. It is important to highlight that this comparison can be done for any sensor that is associated with a hydraulic model element.
For example this can be particularly useful to directly compare sensor data from flow meters or pressure meters with model results data. For that you need to create a SCADA signal element in WaterGEMS and assign it to a junction (if pressure) or to a pipe (if flow).
To see the comparison between the modelled and measured data, there are two possible workflows:
- Go to the sensor overview page, or sensor detail graph page, and turn on model results visibility, see figure below. Model results will be displayed as a blue line in the graphs. This is the easiest way to check the fitness between model and measured results;
- In the Map page, turn on the hydraulic widget and click in one of the model elements that has a sensor wi-fi icon associated. When clicking in one of these elements, two lines will be displayed in the graph: black line corresponding to the sensor measurement and the blue line corresponding to the model result. Directly comparing these two lines at some points of interest allow the user to understand how calibrated and accurate the model can be. Using the measurement dropdown located on the top left of the graph allows to change the measurement that is displayed in the graph for the specific selected element.
Another important note: if the black and the blue line match the exact same value for the initial time step of the model run (when the blue line starts), then it means that sensor data is being used to set the initial conditions for the model run. In case there is a gap between the value for the initial timestep of the model run and the sensor data, then the sensor data is not being used to actively set the initial conditions of the model.
See Also
Preparing WaterGEMS Model for real time simulation in WaterSight