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With the What-if functionality in the NWM the user can interactively (via the GUI) change the model data sets, that means testing for example a new schematisation of the model. Within the current version what-if functionality is tested and implemented for ZWZoetwater. In the follwoing section it will be described how to do it for the LHM model. However, similar steps have to be done to use what-if for other ZW modelsZoetwater models (LSM, NDB, LTM).

Use of What-if

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for Zoetwater models (without use of scenario.xml)

• Place a zip-folder with the new data files at the server under D:\what_if_scenarios (see Figuur WIF.1.): These new files overwrite during the LHM prepossessing the existing files of the base schematisation.
  Do not use any spaces within the folder name!
  The mentioned zip-folder has to be at the same server, where the FSS is hosted which will run the LHM-workflow in combination with the what-if scenario. For example, at the Deltares Test environment the FSS can be approached via 'Remote Desktop Connection' to either aw-fs041.xtr.deltares.nl (with  FSS00 t/m FSS04) or aw-fs042.xtr.deltares.nl with FSS05 t/m FSS09).
  The new model data files also allow a README.txt or other informative files (e.g. description, name, date etc) can be stored in the zipped file as well. To ensure that these files are also archived the filename extension must be .txt.
  
  
  Figuur WIF.1.: Place zip-folder in d:\what_if_scenario

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• save the scenario with the button Bewaar alles
• with the button Beheren.. you can delete or modify the scenario
• Start the LHM run
  
  • • via Starten workflow display:
      
      • Specify task (base schematisation)
      • Specify what-if scenario via wat-als drop-down menu (see Figuur WIF.4.)
        
        
        Figuur WIF.4.:Start workflow
        
        
    • via interactive forecasting display:
      • Specify task (base schematisation) in the interactive forecast display
      • Set task options (button Taak uitvoer opties)
      • Specify what-if scenario via wat-als drop-down menu (see Figuur WIF.5.)
        
        
        Figuur WIF.5.: Interactive forecast display
        
        

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Advance use of What-if

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Zoetwater models (with use of scenario.xml)

With help of the scenario.xml the user has a more flexible instrument flexibility in terms of the zip-folder name and the location for defining what-if scenarios. The steps are described in the following (just changes to the steps described above are explicitly mentioned):

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