2.0

Table Of Contents
Routing Ponds
135
Specifying the Drainage Area
To specify the drainage area
1 Follow steps 16 in Calculating the Required Storage Volume for a Detention
Basin in this chapter.
2 Click the Select button next to the Drainage Area text box.
The Detention Basin Storage dialog box closes temporarily and the following
prompt is displayed:
Select polyline (or Draw):
3 Do one of the following:
n
Select a closed polyline from the drawing.
n
Type Draw and draw the polyline by selecting points. You can type Close to
close the polyline and to return to the Detention Basin Storage dialog box.
The Detention Basin Storage dialog box displays and the value for the area you
select is placed in the Drainage Area text box.
Specifying the Peak Outflow
Use the Peak Outflow Select button to display the Pond Outflow Design dialog
box, which you can use to design inflow and outflow structures for the pond to
more accurately determine the peak outflow.
To specify peak outflow
1 Follow steps 16 in Calculating the Required Storage Volume for a Detention
Basin in this chapter.
2 Click the Select button next to the Peak Outflow text box to display the Pond
Outflow Design dialog box.