Outlet Node property sheet

Here you can enter a node as a terminal point or outlet to a drainage system.

​

The node can be an outlet to the pipe system, or a receiving point for overflows that are directed outside the system. In both cases the window will provide a text box for a surface level.

The program gives you a choice of having the outlet discharge freely to the atmosphere, or having a constant water level. If you select the latter in the During this storm the outlet box, a new text box will appear in which you can enter a water level at the outlet. This is the way that DRAINS defines tailwater levels, and it allows you to set different levels for different rainfalls. Thus the level for a 100 year ARI storm used in Analysis should be higher than for a 2 year ARI storm used for Design.

If you are running an Horton (ILSAX) hydrological model with multiple rainfall patterns the box will display the rainfall patterns in a spin box and require you to define a tailwater level for each. You can proceed through the storms by pressing the arrows in the spin box.

• Related Articles

• Detention basin property sheet

  In this sheet, you must specify an elevation-surface area relationship (or an elevation-volume relationship), select the type of low-level outlet and if necessary, enter data for the low-level outlet of the basin. The characteristics of basin outlets ...

• Weir property sheet

  This special weir object or component can be used with the Full unsteady hydraulic model to provide multiple outlets from detention basins, which can be subject to tailwater influence. It operates like the orifice object that has the same purpose. ...

• Culvert property sheet (obsolete)

  This window displays the information for a culvert specified as a single object , a form that is now obsolete and not available for new DRAINS projects. For these, enter a headwall, pipe, overflow route and node, as shown below. In the property sheet ...

• Node drawing tool

  This tool, , allows you to draw a simple node on the Main Window. When you select this tool, the arrow cursor changes to a pencil. Click the point of the pencil where you wish to locate the node and the node symbol and a name will appear. You can ...

• Overflow route property sheet

  This is used to define the hydraulic characteristics of the flow paths along which overflows from pits, headwalls and detention basins may flow. It takes different forms depending on the type of node from which the route comes, and on the options ...