..  _managing_sources:

Managing Sources
================

As described in :ref:`creating_scenarios`, there are several ways to add a
Source Group to a Scenario. Two options can be found through the
**Scenario Context Menu**, accessed by right clicking a scenario in the Project
Browser:

    **Add Source Group**
        Creates a new, empty source group. 
        
    **Import Retrospective Data**
        Creates a new source group by importing sources from a CSV file. Sample 
        CSV files are included in the *examples* directory of the application.

A third option to add a Source Group to a Scenario is through the **Source Group 
Context Menu**, accessed by right-clicking a Source Group within a Scenario:

    **Clone**
        Creates a duplicate source group in the same scenario.

To manage the sources within the source group, right-click the Source Group 
name and select **Show Source Table**.  This will open a table where sources
can be added or removed and source properties can be viewed and edited.

.. image:: ../_static/SourceTable.png
   :width: 624
   :align: center
   :alt: Source Table

By right-clicking anywhere in the source table, the **Source Context Menu** 
becomes available:

.. image:: ../_static/ContextMenu3.png
   :width: 180
   :align: center
   :alt: Source Context Menu

.. epigraph::

    **Add Source**
       Opens a submenu to add new sources with the following types:
       
          **Area Source** corresponding to ``AREA`` in AERMOD
             
          **Circular Source** corresponding to ``AREACIRC`` in AERMOD
              
          **Polygon Source** corresponding to ``AREAPOLY`` in AERMOD

       The default coordinates are set to Xs = 0 m and Ys = 0 m for the 
       southwest corner of the rectangular area or center of the circle, 
       and Zs = 0 m for an optional elevation of the source
       (``SO LOCATION`` keyword in AERMOD). The default source parameters
       are set to Aremis = 1 g/(s m\ :sup:`2`) for area source emission 
       rate, Relhgt = 0 m for release height above ground, and area is
       defined as either square area 100 m by 100 m in size or circular 
       area with radius of 100 m (``SO SRCPARAM`` keyword in AERMOD). You 
       can edit the starting coordinates by double clicking in the source
       table, or selecting **Edit Geometry**.
 
    **Resample**
       Opens a submenu with the following options for resampling:
        
          **Application Start**

          **Application Rate**

          **Incorporation Depth**

          **Flux Profile**

    **Import**
        Adds additional sources from a GIS shapefile or AERMOD input file.
        
    **Edit Geometry**
        View and edit geometry of each individual source.
        
    **Edit Color**
        Edit the color of one or more sources. Sources will be drawn using
        in the Receptor Editor using the selected color.
        
    **Plot Flux Profile**
        Plot the scaled flux profile corresponding to the selected reference
        flux profile for the source.
        
    **Remove**
        Remove a highlighted source from a list of sources. 

If the source group is empty and sources are to be added manually, the 
**Source Context Menu**  provides only **Add Source** and **Import** options.