Entering Global Project Data

Global project data refers to information that applies to the project as a whole. This includes project properties, storm events, and global storm events.

Defining Project Properties

Project Properties are purely informational data that store the Project Title, Engineer’s Name, Company Name, and the Date, along with any notes associated with the project

Table 3-7: Outfall Attributes Element Ground

Elevation (ft.)

Set Invert Elevation to Ground Elevation

Invert Elevation (ft.)

Change Label To

OF-1 95.00 False 91.00 Treatment

OF-2 95.00 False 91.00 Overflow

This data, if entered, will be added to the footer of any of the preformatted reports that are generated by SewerGEMS V8i, with the exception of the data entered in the Notes field, which will not be displayed.

If you’ve already completed Part 1 of this lesson, you can continue using the same model. Otherwise, begin by clicking the File/Open button; then, browse to the C:/

Program Files/Bentley/SewerGEMS V8i/Lessons folder, highlight Lesson_3_2.swg, then click Open.

1. Click the File menu and select the Project Properties command.

2. In the Project Properties dialog that appears, enter the following information in the specified fields:

3. The date is automatically entered using the information in your system calendar.

The dialog should now look like this:

4. Click the OK button.

Table 3-8: Project Properties

Field Name Value

Title Lesson Model

Engineer <Your Name Here>

Company: <Your Company Name Here>

Lesson 3: Entering Data

5. To see how the information will appear on the preformatted reports, click the Report pulldown menu and select the Project Inventory command.

6. In the Project Inventory report dialog, scroll to the bottom of the page to view the footer.

Defining Storm Events

A storm event is a single curve that represents one rainfall event for a given recurrence interval. Once the storm event is created it can either be used locally at a catchment, or it can be used globally, as discussed in the next section of this part of the lesson.

This example shows how to retrieve and paste an external rainfall data source file into SewerGEMS as a cumulative rainfall data table. See Lesson 7 for a detailed example on how to set up multiple return events from synthetic rainfall data (such as SCS Type I, IA, II, III distributions).

1. Click the Components pulldown menu and select the Storm Events command.

2. In the Storm Events dialog that appears, click the New button and select Cumu-lative from the submenu that appears.

3. In the Time Settings dialog that appears, enter the following data:

Table 3-9: Time Settings Field Name Value (hrs)

Start Time 0.000

Increment 0.100

End Time 24.000

4. The start and end times define the duration of the storm event, while the increment defines the amount of time between each ordinate when the storm is calculated.

Click the OK button to close the Time Settings dialog.

5. In the Return Event field, enter a value of 10 years.

6. Using Windows Explorer, browse to the C:/Program Files/Bentley/SewerGEMS V8i/Lessons folder and open the text document entitled Storm Event Data.txt.

Highlight all of the data in the text file, and press Ctrl+C on your keyboard to copy the data.

This procedure demonstrated how you can copy storm data from a predefined storm event, created from external rainfall data sources. Lesson 6 describes a detailed example on how to set up multiple return events from synthetic rainfall data (such as SCS Type I, IA, II, III distributions)

7. Back in the Storm Events dialog, highlight the Depth column of the Time vs.

Depth table on the right side of the dialog and press Ctrl+V on your keyboard to paste the data into the table.

8. Click the Close button to close the Storm Events dialog.

Lesson 3: Entering Data

Defining Global Storm Events

As mentioned in the last section, once a storm event is created, it can be assigned locally to one or more catchments, or assigned to the project globally. When a storm event is defined as a global event, it applies the storm event to every catchment in the scenario that does not have localized rainfall.

1. To apply the storm event we just created globally, click the Components pull-down menu and select the Global Storm Events command.

2. In the Global Storm Event dialog that appears, click the arrow button in the Global Storm Event field. Select the only event in the list, Storm Event - 1.

3. Note that the other fields in the dialog, colored yellow to denote their read-only status, are filled in automatically with the data associated with the selected storm event. Click the Close button to close the Global Storm Events dialog.

Adding Sanitary Loads

In this part of the lesson, we will set up a unit sanitary load and a pattern sanitary load.

A unit sanitary load can be set up once and then used at multiple nodes, and can also be saved as an engineering library for use in other models (see “Adding Unit Sanitary (Dry Weather) Loads” on page 7-370). A pattern sanitary load is a load that varies over time.

1. To create a new unit sanitary load, click the Components menu and select the Unit Sanitary (Dry Weather) Loads command.

2. In the dialog that appears, click the New button and select Area from the submenu that appears.

3. Right-click the gal/min label to the right of the Unit Load field and select the Units and Formatting command from the submenu that appears.

4. In the Set Field Options dialog that appears, change the Unit value to gal/day.

Click OK.

5. Back in the Unit Sanitary Loads dialog, enter 720 in the Unit Load field. Click the Close button.

6. Highlight MH-3 in the drawing pane.

7. In the Properties Editor, click the ellipsis button in the Sanitary Loads field.

8. In the Sanitary (Dry Weather) Flow dialog that appears, click the New button and select the Unit Load - Unit Type and Count command from the submenu that appears.

9. Enter 6.5 in the Loading Unit Count field.

10. Click the Unit Sanitary Load pulldown menu and select Unit Sanitary Load - 1.

Click OK.

11. Highlight MH-4 and repeat steps 7 - 10.

12. Highlight MH-2.

Lesson 3: Entering Data

13. In the Properties Editor, click the ellipsis button in the Sanitary Loads field.

14. In the Sanitary (Dry Weather) Flow dialog that appears, click the New button and select the Pattern Load - Base Flow and Pattern command from the submenu that appears.

15. Enter 7200 in the Base Flow field.

16. Click the ellipsis button next to the Pattern field. In the Patterns dialog that appears, click the New button. Enter 0.5 for the Starting Multiplier.

17. Using Windows Explorer, browse to the C:/Program Files/Bentley/SewerGEMS V8i/Lessons folder and open the text document entitled Sanitary Load

Pattern.txt. Highlight all of the data in the text file, and press Ctrl+C on your keyboard to copy the data.

18. Back in the Patterns dialog, click the Time From Start column heading, hold down the mouse button, and drag the cursor over to the Multiplier column to highlight both columns, then press Ctrl+V. Click the Close button.

19. Back in the Sanitary (Dry Weather) Flow dialog, click the Pattern pulldown menu and select Pattern - 1. Click OK.

20. To apply the pattern to the unit load we created, you must create a Pattern Setup.

Click the Components pulldown menu and select the Pattern Setups command.

21. In the Pattern Setups dialog, click the New button to create a new pattern setup.

22. Click the pulldown menu in the Setup Pattern column and select Pattern - 1.

23. Click the Close button.

24. Finally, change the calculation option so that the Pattern Setup is applied. Click the Analysis pulldowm menu and select the Calculation Options command.