JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Orifices There are two types of orifices that are associated with a pond outlet’s complex outlet structure: Circular Orifice area Both structures are defined by behaviors when submerged and unsubmerged. For more information, see the following topics: Submerged Orifice Hydraulics Circular Unsubmerged Hydraulics Orifice Area Unsubmerged Hydraulics Orifice Orientation Parent topic: Dynamic Storage Routing