Pond outflow is determined by the types of pond outlet structures which are associated with a given pond. The pond outlet can simply represent a connection point between the pond and a downstream conduit, or a more complex composite outlet structure.

The composite outlet structure at a pond outlet is a parallel set of outlet components which empty into the pond outlet's downstream link.

Composite outlets consist of the following types of structures:

• "Riser Structures"
• "Orifices"
• "Weirs at Pond Outlets"