Threshold color bars (Figure 1) are linear histograms that compare incoming data against threshold values set for a location. Because threshold color bars are usually location dependent, you typically set the values for each time series icon individually. The name of the location appears adjacent to the threshold color bar, and the length of the threshold color bar represents a time line equal to the duration of the time window. Segments along the color bar reflect time intervals, with colors corresponding to the data quality legend you have defined. The threshold color bars are updated dynamically at the time interval that you entered in the Set Time Window dialog.

Figure 1 Threshold Color Bars

Assigning threshold color bars to specific HEC-RTS modules: 

  1. From the HEC-RTS CAVI main window, open a watershed, click the Setup tab, from the Map Window, click the Time Series Icon Tool. 
  2. Right-click a time series icon, from the shortcut menu, click Edit. The Time Series Icon Editor dialog opens, click the Icon Types and Layers tab
  3. From the Data Set list, select the data set that you want to display a threshold color bar in a module.
  4. For each HEC-RTS module that you would like to see a threshold color bar displayed in the map window, from the Icon Type list for each module, select Threshold Color Bar.
  5. Click OK, the Time Series Icon Editor dialog closes, and the assignment will be saved. Each data set assigned as a threshold color bar will be assigned a color. However, these colors can be set, which is described in the following section.

To set the threshold values for a threshold color bar: 

  1. From the Time Series Icon Editor dialog (Time Series Icon Editor - Icon Types and Layer Tab), click the Icon Types and Layers tab, click Threshold Colors.
  2. The Threshold Color Bar Editor for Time Series (Figure 2) opens. For a regular threshold color bar, in the Color Bar Type box, select Regular Threshold.
    Figure 2 Threshold Color Bar Editor for Time Series
  3. To edit threshold values, from the table click in the cells under the columns Lower Limit and Upper Limit. Enter values as need, to add rows to the table, from the Edit menu click Insert Row.
  4. To associate a color with that threshold value, click in a cell under the Color column, a list of available colors appears. Click the color you wish to change, and the color will now appear in the cell of the Color column.
  5. The Applies to group box sets the properties for all similar threshold color bars in the watershed. This Data Set Only is selected by default and sets the properties to only be used by the current data. Parameter (Figure 2) sets the property settings to all time series icons using the same selected parameter. Group assigns a name to the properties, which can then be used and assigned to additional time series icon properties. Global Default sets the properties for all time series icons.
  6. Click OK, and the Threshold Color Bar Editor for Time Series closes. You will not see a change in the Setup Module, but you will see the changes in any of the other modules where the time series icon appears as a threshold color bar.