Connecting an Urban Drainage Network to a River Network - Running an integrated 1D model

Tutorial resources

These downloadable resources will be used to complete this tutorial:

Step-by-step guide

Separate river and urban drainage networks are connected to create an integrated model. Flow can transfer between the urban drainage network and the river channel via created connection points, and a simulation can now be run on the fully integrated model.

Open the transportable database .icmt file for this tutorial.
In the transportable database window, right-click the top-level folder and select Copy.
In the Model Group window, right-click the Database and select Paste.

When running an integrated model, consideration should be given to the event files being used, as the hydrology is more complex.

From the Database, right-click the Design Peaks Matched rainfall event and select Open as.

The InfoWorks ICM interface with the integrated model open in the GeoPlan, and in the Database, Open As selected in the Design Peaks Matched shortcut menu.

In the Select Format dialog box, select Graph.
Click OK.

This rainfall event is shifted, so that the peak rainfall occurs at the same time as the inflow file.

A graph of Rainfall intensity in mm/hr over a 24-hour period, showing the rainfall event shifted, with the peak rainfall occurring at the same time as the inflow file.

Close the graph window.

Now, set up the simulation:

From the Database, right-click the Model group and select New InfoWorks > Run.
In the Run dialog box, add a Run title of “1D Integrated”.
From the Database, drag the 1D Integrated Model into the Run dialog box and drop it into the InfoWorks network box.

In the Run dialog box, the 1D Integrated Model being dropped into the InfoWorks network box, with a red arrow showing its path from the Database.

Set the Timestep(s) to a more appropriate value of 5.
Set the Results timestep multiplier to 60.
Set the Duration drop-down to Hours and the amount to 30.
From the Database, drag the Design Peaks Matched event and drop it into the Rainfall Event box.
From the Database, Ancillary files folder, one at a time, drag the 5 Year Inflows, Trade Profile and Wastewater Profile files and drop them into the corresponding boxes.
Click Run simulations.

The Run dialog box with all options configured for the simulation for this exercise and Run simulations selected.

In the Schedule Job(s) popup, click OK.
From the Window menu, select Job control window to display the status of scheduled simulation jobs.

The simulation should complete with no errors or warnings.

The Job Control window showing the completed simulation in green to indicate completion with no errors or warnings.

From the Database, expand the 1D Integrated run.
Double-click the simulation icon to open the results on the GeoPlan.
Use the Find in GeoPlan tool to locate river reach links 16DS.1 and 17DS.1.
With the Select tool activated, press and hold CTRL to select both links.
From the Results toolbar, click Graph Selected Objects.

In the GeoPlan, the two found river reaches appear selected in red, and in the Results toolbar, the Graph Selected objects tool is selected and called out.

In the Graph Selection popup, select the Flow attribute.
Click OK.

The graph displays the sewer inflows into the river where connections are made to create the integrated model.

A graph showing flow (m3/s) over the simulation period for the sewer inflows where connections are made.

Use the Find in GeoPlan tool to locate conduit TF91299303.
From the Results toolbar, click Graph.
On the GeoPlan, select the conduit.

On the GeoPlan, the conduit to be graphed is selected and highlighted in red.

In the Graph dialog box, select Flow.
Click OK.

The graph shows that flow is coming up the pipe from the river and inundating the sewer network.

A graph showing the flow (m3/s) for the selected pipe over the simulation period, with upstream and downstream flow represented by black and green lines, respectively.

To investigate the simulation results using themes:

From the Database, drag the 1D Results theme onto the simulation results.
Use the Replay Control toolbar to replay the simulation, or show the maxima results to see the areas of flooding in the model.

In the GeoPlan, the model with the 1D Results theme applied and showing maxima results, represented by bright pink arrows; with 1D Results highlighted in the Database and the Show maxima button highlighted in the Replay Control toolbar.

Running an integrated 1D model

Step-by-step guide

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