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The first line you created will be the Primary drainage line. If you create another drainage link from the same node going to some other nodes, that will be created as Secondary drainage link.
The first line you created will be the Primary drainage line. If you create another drainage link from the same node going to some other nodes, that will be created as Secondary drainage link.
Editing Drainage Link Properties describes the available drainage link properties in more detail, including the provision to specify flow-routing properties at each drainage link.
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