A riser structure is not available in the outlet structures list, because it is made implicitly available in each outlet structure's input options. The program neglects any storage of water in the riser, using it only to arrange outlet structures for flow control. So, marking weirs or orifices for flows into, or out of, a riser, will provide for the riser inlet and outlet control behaviors. If no riser is present, structures should be marked as outletting directly from the dam.
(return)