Technical data

Estimating TR-55 Detention Basin Storage

To calculate the required storage volume for ponds

Steps

Use

to look up

1 Determine the pre- and post-development

watershed hydrological characteristics of the site.

2 Use one of the Hydrology runoff methods

described in the preceding topics to

determine the post-development peak inflow

discharge to the detention basin and the pre-

development peak outflow discharge from

the detention basin.

Overview of Calculating the

Runoff from the Watershed

Areas

3 From the Hydrology menu, choose

Routing ➤ Detention Basin Storage to display

the Detention Basin Storage dialog box.

Calculate the Required

Storage Volume for a

Detention Basin

4 Click the Data Input button or the Hydrograph

button to load an Inflow file. The InFlow File label

displays the name of the currently loaded file that

defines the Peak Inflow. This file can be a

graphical, tabular, or hydrograph file.

5 The Pond Name label displays the name of the

currently selected pond. Click the Pond button to

select an existing pond from the drawing.