You can add a Surface Depth vs. Area curve to any catch basin or manhole in your model. The Surface Depth vs. Area curve plots depth against area for a series of data points that you define.

To add Surface Depth vs. Area data to a catch basin or a manhole:

1. Display the Property Editor for a catch basin or manhole by clicking the element in the Drawing Pane, or by right-clicking the element then selecting Properties from the shortcut menu.
2. In the Physical: Surface Storage section of the Property Editor, select Surface Depth- Area Curve as the Surface Storage Type. The Surface Depth-Area Curve field becomes available.
3. Click the Ellipses (...) button next to the Surface Depth-Area Curve field.
4. In the Surface Depth-Area Curve dialog box, each row in the table represents a data point on the Surface Depth-Area curve. Type values for the Depth and Area for each row. Click the New button to add a row or press the Tab key to advance to the next field in the table.
5. Perform the following optional steps:
6. To delete a row from the table, select the row then click Delete.
7. To view a report on the curve, click Report.
8. To view a plot of the curve, click Graph.
9. Click OK to close the dialog box and save your curve data in the Property Editor.

Surface Depth-Area Curve Editor

This dialog box allows you to define Depth vs. Area tables for manholes and catch basins. The dialog box contains the depth-area table and the following buttons:

The table contains the following columns: