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WaterGEM Batch-run process

Hi everyone,

I am very new to this software and  I hope someone can help me out with this problem:

I have a water distribution model which I would like to have a batch run process to analysis every node with 10 different flow demands and output the pressure and velocity of that node (and adjacent nodes) for a 24-hour period. The results (pressure & velocity of that node) can be outputted into txt or any other formats.

Is there a in-build function to do this batch-run process or others ways to work around it?

Your help will be much appreciated.

Thank you,

Shane

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  • Hello Shane,

    Do you mean that you want to have case where every node has 10 different demands and batch run all these cases/scenarios?
    You can create different scenarios and alternatives for each i.e. 10 scenarios and alternatives. You need to have multiple demand alternatives as you have multiple demands.
    Here is technote on Scenarios and Alternatives Management.
    http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4508.scenario-and-alternative-management 
    Once you have created the Scenarios and their corresponding Alternatives, you can batch run those together to have results together. (Batch run is explained in the above mentioned technote).

    For the 24-hour run period, change the time analysis type to EPS in the calculation options. When you have computed the model, you can see results of pressure and velocity etc. in the reports tab. You can export the results in the text format as well.

    Regards,

    Sushma Choure

    Bentley Technical Suppport

  • Hello Sushma,

    Thank you so much for your suggestion. Yes, I would like to have every node with 10 different demands and analyse them independently. In each scenario, only the demand in one of the nodes will change, while all other nodes' demands remain as the base case scenario.

    The problem is that model contains more than 5,000 nodes, so it is hard to create all these scenarios and alternatives manually. (10 different demands for each node, so 5000 nodes will have 50,000 scenarios to set up.)

    Do you know whether there is a method to create all the scenarios and alternatives in a batch-run?
  • That sounds like an awful lot of work when 99% of the work will not be used. How could you ever keep track of all those permutations? You certainly don't need to keep track of the variations at each node.

    What some may do is have a high, avg, low forecast for say 2020, 2030, 2040.
  • Yes, it is a lot of work to do this manually. That's one of the reasons I would like to find out whether there is a way to batch-run all these repetitive analysis. Results can be outputted in text format and sorted in excel if required.
  • The batch run process is available for computing multiple scenarios, but that is not available for creating multiple scenarios/alternatives. As each alternative will have different input data, which you need to provide manually.
    What Dr. Tom said is the right workflow to follow.

    As for the alternatives, you can duplicate them by right clicking on it. But again you need to rename them so that you can identify it correctly.

    Regards,

    Sushma Choure

    Bentley Technical Suppport

  • Hi Sushma,

    Thank you for your reply, much appreciated.

    I had a quick search on the internet on automated fire-flow analysis and there is one article that give the results which are exactly what I am looking for: www.yso.com/.../addition_to_packet-fireflow_analysis.pdf

    The color-coded maps show the available flow at every node in the system. And can this process be automated?

    My apology for not explaining my question very clearly at the first place.

    Thank you,
    Shane
  • Hello Shane,

    The following supported solution deals with automated fire flows, including the general setup and interpreting the results: communities.bentley.com/.../understanding-automated-fire-flow-results

    The PDF that you included has the user color coding on the Fire Flow (Available) results field for the junctions after completing the automated fire flow.

    Regards,
    Scott
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