This section includes the following tools.
Click the Add Node/Link button to open the window where users can add different types of objects.
Merge Overland Nodes
Select two adjacent Overland Nodes by holding Ctrl and clicking the two nodes on the map. Then, click Merge Overland Nodes button to merge the two nodes.
The Delineation Node is used to separate catchments and combine several flow paths. A Delineation Node is always connected to a Major Node. To add a delineation node, click the Create Delineation button. A window will pop up. Select the Major Node. The selected Major Node will be shown in the Selected Major Node field on the pop-up window of Create Delineation.
Then click on the flow path to add a delineation node. User can add several delineation nodes to one major node by continuously clicking on the flow path. If users want to add delineation nodes to another major node, click the another Major Node, check the Selected Major Node field is updated and then click on the flow path.
Create Sag Node
Sag area is modelled as a Storage Unit. The Storage Curve is automatically measured from the DEM. To add a Sag Node, click the Create Sag Node button. In the pop-up window, choose the sag layer in the drop-down list of Sag Intersection Layer. If users want to add conduit links between major node and sag node, check on the box Enable Auto Connection. If users only want to add a sag node and make connections later, uncheck the box.
Sag area can be modelled as a Storage Unit. VOSWMM can measure the Storage Curve from the DEM.
Click the Start button on the Create Sag Node window. Hover your mouse cursor to the map and the mouse cursor changes to the Edit mode. Click anywhere on the Sag Area. The place where you click will show a red dot.
Move your mouse to the flow path where you want to place the Storage Unit in the sag area. Snap on the flow path. The snapped Vertex is in a red box.
Click to add a Storage Unit node on the flow path. The Storage Curve is automatically obtained and shown in the table of Create Sag Node window,