Working with scenarios

Step-by-step Guide

InfoWorks WS Pro allows you to model different scenarios, which act as different versions of a network or control. Scenarios can be used to model alternate networks and controls, including the ability to rezone networks or remove parts of the model. Scenarios also let you track changes to the base network and control, so they remain up to date.

For this exercise, a new model group and a new run group are already created.

1. From the menu bar, select Scenarios > Create scenario.

2. In the Create New Scenario dialog box, in the New Scenario Name field, type “Pipe Replacement”.
3. Select Create matching scenario in the Control.

Enabling this option creates a connection between the network and control.

4. Click OK.

In the Scenarios toolbar, in the Select scenarios drop-down, Pipe Replacement now appears.

5. In the Scenarios toolbar, click Manage scenarios.

6. In the Scenario dialog box, select Network.
7. In the Manage Network Scenarios dialog box, review the newly created scenario.

8. In the Model Group window, under Session 04, notice the network and control are both marked with a red circle with an exclamation mark (!), indicating they have been changed.

To replace an existing pipe with a new pipe:

9. In the Operations toolbar, click Find network objects.

10. In the Network Find dialog box, in the Match Identifier group box, select Asset.
11. In the object list, select Links.
12. Enter “193479*” into the Wildcard field.
13. In the Matched Objects list, select the asset ID 193479.
14. Click Select and find.

In the GeoPlan, the found pipe is highlighted in red.

Note: Before making changes, always confirm you are working in the correct scenario. In this example, in the Scenarios toolbar, the Select scenario drop-down should read, “Pipe Replacement”, and in the GeoPlan, both nodes at each of the pipe should be visible.

15. In the Tools toolbar, expand the Object category drop-down and select Link.
16. Click New Object.

17. In the GeoPlan, click the node at the lower-left end of the pipe.
18. Click again above the pipe to add another link.
19. Click the node at the other end of the pipe.
20. In the Create New Link dialog box, click OK.

Notice that a new pipe bypassing the old one now appears in the network.

21. In the Properties panel, under Shape, in the Diameter field, enter “100”.
22. Under Friction, in the friction coefficient field, or CW – k (millifeet), enter “0.1”.

23. In the Tools toolbar, click Select.

24. In the GeoPlan, click the old pipe.
25. In the Advanced toolbar, select Confirmed deletion.

26. In the warning dialog box, click OK.

Notice that the deleted pipe now appears gray, because it still exists in the Base scenario, but not in the current Pipe Replacement scenario.

27. In the Scenarios toolbar, expand the Object category drop-down and select Base.

Notice that the old pipe reverts to its original dark blue color.

28. Switch back to the Pipe Replacement scenario.

To validate the model:

29. In the Operations toolbar click Validate.

30. In the Network Validation dialog box, Scenarios group box, ensure only Pipe Replacement is enabled.
31. Click OK.

In the Output Window, notice there are no errors.