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Can I set the value of flow and pump head to a specific number like the value from SCADA?

If my model have two water source with pumps and I have SCADA datas of pumps, can I just fix the flow and pump head of them?

It might helps me to analysis the flow in pipes and pressure of junctions are correct or not.  

  • Hello Pan,

    The pump heads and flows should be fixed as per the demand of your network. The general workflow is such that based on the network demands, the pumps are "sized" and then optimized. If you are having historical SCADA data for pumps a better approach would be to first design (head and flow) the pumps as per your demands and then compare it with the historical data to check if the provided head and flow are sufficient.

    You can refer the Chapter titled "Importing SCADA Data" in the Quick Start Lessons of WaterGEMS which outlines the basic steps for importing historical SCADA data and comparing with your model.

    Once you compare the SCADA data with your model you will understand how your pump is functioning as compared to historical readings.

    Hope this helps.


    Yashodhan Joshi

  • Hello Pan,

    Additionally you can refer the following article which discusses the functionality of SCADA Connect Simulator which might be helpful in this case.

    SCADAConnect Simulator for WaterGEMS (V8i SELECTseries 6 and CONNECT edition)


    Yashodhan Joshi

  • Thank you for your advice, but I just have the flow and head value from SCADA not the whole file.

    So it might be too complicated to import SCADA data for me.  

    I just want to fix the pump flow and head and see what will these two source react in the model.

  • You really shouldn't "fix" both the head and flow at the pump. You should use the pump curve for the model and see what operating points the model calculates. If they agree with the SCADA data, then your model is good. If the model doesn't agree with the SCADA data, you need to determine why it doesn't and correct that issue.

    However, the way you approach this depends on the kind of analysis you are conducting. For example, if you are studying pump selection or operation, you should use the pump curve.

    In some cases  you are studying some problem out in the system far from the pump.  You may be able to get by with some shortcuts such as representing the pump as a know HGL (using a Reservoir node) or representing the pump as a known inflow (negative demand on teh system) on the system. In each case, you need to check that the results are reasonable. For example, if you represent the pump as its discharge HGL and the pump flow at that head is 50 L/s, make sure that the model isn't saying that the discharge from the reservoir is 150 L/s.

    In general, the best use of SCADA data is to compare it with model results for calibration and use the resulting pump curve, not the SCADA data itself, to drive the model.

  • Please also see the following relevant wiki article: Using pump flow test data to create a pump curve


    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.