You can enter a hydrograph (in flow units) at any node element (e.g. catch basin, manhole, catchment, cross section, wet well). You can also enter a unit hydrograph, but only at a catchment node.

To enter a hydrograph (in flow units) using the Inflow Collection Editor:

1. Select the element in your model.
2. In the Property Editor, click the Ellipsis button (...) in the Inflow Collection field.
3. In the Inflow Collection dialog box, click the New button and select Hydrograph Load.
4. Enter values into the table of flow vs. time, then click OK.

To enter a unit hydrograph at a catchment:

1. Select a catchment in your model.
2. In the Property Editor, select Unit Hydrograph as the Runoff Method.
3. In the Property Editor, select Generic Unit Hydrograph as the Unit Hydrograph Method.
4. Click the Ellipsis button (...) in the Unit Hydrograph Data field.
5. In the Unit Hydrograph Data dialog box, enter values into the table of flows (for a unit of rainfall) vs. time, then click OK.