Step-by-step guide

When performing a multi solute water quality simulation, after the MSQ model has been set up using the Solute Data Object dialog box, and after the network has been dosed with the contaminants, you can configure and run the MSQ simulation.

In the Database, right-click the MSQ Model.
Select New > Run Group.

In the InfoWorks WS Pro interface, Model Group, the MSQ Model shortcut menu with New selected, and in the flyout, Run Group selected.

In the popup, type the name “Run Group”.
Click OK.
Right-click the Run Group and select New > Run.
In the Schedule Hydraulic Run dialog box, name the simulation “MSQ Example”.
Enable Experimental.
From the Model Group, drag MSQ Network into the Schedule Hydraulic Run dialog box and drop it into its respective box.

The Control and Demand Diagram boxes populate automatically.

In the InfoWorks WS Pro interface, a red arrow shows the path of the MSQ Network from the Model Group to the Network box of the Schedule Hydraulic Run dialog box, where the Control and Demand diagram boxes are also populated.

Set the Start date and time to May 2, 2022 at 00:00.
Set the End date and time to May 4, 2022 at 00:00.
In the Run Type group box, expand the drop-down and pick Water Quality to open the Water Quality Options dialog box.
From the Database, drag the MSQ Example solute data into the Water Quality Options dialog box and drop it into the Solute Data box.
Set the Stagnant Threshold to 0.01 l/s.
Click OK.

In the Water Quality Options dialog box, MSQ Example is added to the Solute Data box, and the Stagnant Threshold is set.

Note that you can reopen the Water Quality Options dialog box from the Schedule Hydraulic Run dialog box, Run Type group box, by clicking the Options button.

In the Schedule Hydraulic Run dialog box, the parameters are set for the MSQ Example water quality run.

Back in the Schedule Hydraulic Run dialog box, click Save.
Click Run.

In the Model Group, the simulation results now appear under the MSQ Example run.

To graph the results:

Drag the MSQ Control results and drop them onto the GeoPlan.
In the Operations toolbar, click the Find network objects tool.

The MSQ Control results open on the GeoPlan and in the Operations toolbar, the Find network objects tool selected and called out.

In the Wildcard text box, enter the Node ID ST26366402.
Click Select and find.

In the Network Find dialog box, the Node ID is entered, and Select and find is selected.

Close the Network Find window.
In the Operations toolbar, click the Graph selected objects tool.
In the Graph Selection dialog box, in the Left group box, select Concentration 01 A.
In the Right group box, select Concentration 02 B.

In the Graph Selection dialog box, the Left and Right attributes are highlighted and OK is selected.

Click OK.

On the graph, you can see the concentration of the two contaminants at the point below the reservoir across the simulation.

A results graph of the concentrations (mg/l) of contaminants A and B over the two month simulation period at the point below the reservoir; and behind, the zoomed-in GeoPlan.

Repeat steps 21-28 to create a graph for Node ST28366403.

A results graph of the concentrations (mg/l) of contaminants A and B over the two month simulation period for the second node.

To see how Contaminant A and B react to form Contaminant C across the network:

Double-click the Contaminant C theme.
On the Replay toolbar, click Play to start the simulation and visualize the movement of Contaminant C through the network over time.

The Contaminant C theme open and playing on the GeoPlan to simulate the movement of Contaminant C through the network.

Multi Solute Water Quality simulations for complex reactions

Tutorials

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