Stream nodes are part of the representation of the stream network in the watershed. CWMS creates a stream node at the beginning and ending of each stream element and where stream elements meet (stream junctions). Stream nodes are used to establish stationing for a stream. To modify the default stream stationing, you must edit the stream nodes using the Stream Node Tool .

Though they appear similar, stream nodes are not the same as computation points. A computation point is a location where time-series data and information is exchanged between analysis software. Stream nodes are useful in placing computation points.

Add a Stream Node

As noted above, two stream nodes are created automatically at the beginning and end of a stream element. To add stream nodes to a stream element: 

  1. Using the Stream Node Tool, place the pointer on the stream element where you want to add a stream node. Hold down the CTRL key, and click.
  2. Repeat this process until all necessary stream nodes are added to your stream elements. Double-click in an open area of the map to finalize the edits to the stream nodes (the node will de-select).

Move a Stream Node

To move a stream node: 

  1. Using the Stream Node Tool, double-click the stream node that you want to move. The selected node will become a yellow circle with a black outline and four small black dots. Click and drag the stream node along the stream element to move it to its new position.
    Moving a Stream Node
  2. Double-click in an open area of the map to finalize the edits to the stream nodes (the stream node will de-select).

Edit a Stream Node to Establish Stream Stationing

After placing a stream node on the stream alignment, you can edit the stream node to establish stationing for the stream element. To edit a stream node: 

  1. Using the Stream Node Tool, right-click on the stream node that you want to edit. A shortcut menu will appear.
    Stream Node Shortcut Menu
  2. Click Edit Node. The Stream Node Editor dialog opens.
    Stream Node Editor Dialog
  3. The default stream station for the downstream node is 0. The stream station for the upstream node is based on the coordinate system you used when digitizing the stream alignment. To change the default stream stationing, un-check the box next to the Use Default Stationing option.
  4. Edit the station in the Station field.
  5. Click OK. Based on what station number you enter, CWMS will automatically adjust the stream stationing for the stream element. This includes the upstream and downstream nodes.

Delete a Stream Node

To delete a stream node: 

  1. Using the Stream Node Tool, right-click on the stream node that you want to delete. A shortcut menu will appear.
  2. . Click Delete Node.
  3. A confirmation message opens. If you are certain, click Yes.