This tutorial will teach you how to edit an HEC-MetVue project for integration into your CWMS watershed. 

  1. From the Setup module in the CAVI, expand the HEC-MetVue node. Right-click on a HEC-MetVue alternative and select Edit MetVue Alternative from the shortcut menu
  2. The MetVue Alternative Editor dialog will open. Ensure that the Lookback and Forecast checkboxes are correctly set for each of the Map Panels
    1. Lookback should be checked for QPE/Observed Temperature and other observed data.
    2. Forecast should be checked for QPF and other forecast data.
  3. SoS/EoF offset is the area where you can set an offset for map panels from either the Start of Simulation (SoS) or the End of Forecast (EoF)
    1. To use these offsets you must first select the Interval from the Interval column associated with the Map Panel

      If you are using HMS Gridded Hamon ET method, the Observed Temperature must have a SoS offset to -1 and the EoF must have an offset of 1 day for the Forecast temp.  More information on the HMS Gridded Hamond ET method can be found here: HEC-HMS Users Manual: Evapotranspiration

  4.  Under Basin Average Maps the Basin ShapeFile used for the Basin Average should be visible.
    1. This map will not show up unless a Map Panel is selected from the top of the window.
      1.  Note that each map panel must be clicked on individually to show/set the basin average map for that Map Panel.
    2. If, after selecting a map panel, no basin average map displays; the MetVue model must be opened and a basin average map would need to be selected.  To do this you can follow steps 5-7 here: Creating an HEC-Metvue Project

  5. The Tin/Grid Input should be DSS from the drop down.
    1. This is where the input path is selected/displayed
    2. Ensure that this pathname for the highlighted Map Panel is correct. Add additional pieces as needed
    3. Selecting Browse will also allow for the selection of the input, rather then typing it in the box
      1. Using Browse will automatically set the correct duration for the chosen path.  If the path is not selected this way you may need to check your data to ensure the correct duration was chosen for the input data.
  6.  Click “Apply” to commit all of the changes you have completed on this tab
  7.  Select the “Output Settings “ tab at the top of the window
  8.  Click “Add” to create a new Dataset
    1. A New Dataset will appear
  9. Change the Dataset name to one that is indicative of the data you are creating output for
    1.  "QPF_Precipitation" is a good example of a dataset name 
  10. Select the "Parameter" for the dataset
    1. Precipitation parameter will be Precip.
    2. Temperature parameter will be AirTemp

      It's very important to make sure that your temperature grids are given the parameter "AirTemp" or they will not be useable by HEC-HMS 

           
  11. Select the "Units" for the dataset
    1. Precipitation Units typically will be "mm", unless using a non-standard product
    2. Temperature Units typically will be "deg C", unless using a non-standard product
  12. Select the Lookback Map for the dataset from the drop down
    1. Your Lookback Map will be any of the Observed Data that you marked as Lookback from the Input tab.
      1.  If the data you want to use is not given as a lookback choice, return to the Input Settings tab and ensure it was marked as "Lookback" from Step 2
  13. Select the Forecast Map for the dataset from the drop down
    1.  Your Forecast Map will be any of the Forecast Data that you marked as Forecast from the Input Settings tab.
      1.  If the data you want to use is not given as a Forecast choice, return to the "Input Settings" tab and ensure it was marked as "Forecast" from Step 2
  14. Select your Time Zone by clicking on the "..." in the Time Zone box.  It will most likely be either UTC or GMT, but there may be exceptions to this
  15. Choose the appropriate Output Time Interval and Parameter Type for your dataset from the dropdown box
    1. The Precipitation dataset has an Output Time Interval of 1Hour and Output Parameter Type of PER-CUM
    2. The Temperature dataset has an Output Time Interval of 0 which is the interval that matches the Output Parameter Type of INST-VAL required by HEC-HMS
  16. Select the "Output Extents" shapefile from the drop down, the chosen shapefile will clip the output to that shapefile
    1. Your output extents shapefiles will be the shapefiles you associated in HEC-MetVue, and can be changed by loading additional shapefiles to the map panel as seen in steps 5-7 here: Creating an HEC-Metvue Project
    2. You can use the dropdown to select the shapefile you would like to represent the output If you have more then shapefile
  17. Select the check box "Save Modified TINs to DSS", under "DSS Grid Outputs"
    1. Once selected, the pathname and Parts will auto populate except the B part.
    2. Enter your preferred B part to match the data that HEC-HMS is looking to ingest (this will need to either match or be adjusted in model linking)
    3. You can also Browse to the correct pathname if you already have an example in the forecast DSS file

      You can optionally have HEC-MetVue create a timeseries with this data by selecting "Time Series Generation" , "Save to Time Series" and selecting the choice for the Sub-basin Name from the Sub-Basin name Column.  Note if you chose "Name" from the dropdown, it will name the output with the same sub-basin names you see in the HEC-MetVue Map.  Generating a new Time Series can allow for closer inspection and calibration of different aspects of a model.  For example, calibrating snowmelt, or inspecting precip over a particular basin as opposed to the entire watershed. 


  18. Check to ensure there are no warnings showing in the Warnings box; if there are review Steps 2-17 to ensure nothing was missed.
  19. Click Apply and then OK to complete editing the MetVue Alternative and close the Editor Window.