• Layout links and nodes in Hydraulics mode • Derive ground elevations and inverts from a DTM
• Calculate pipe lengths from the model coordinate system • Enter required data for links and nodes in dialogs
• Enter the basic configurations settings for solving in Hydraulics • Obtain results from the output file and the Review Results tool
Time: 1 hour
Data files: Yarra30.xp (From previous hydrology tutorial Yarra23m.xp) Contours.xptin
Part 1 – Adding Objects to Hydraulic Network
1. Making the Hydraulic network active. Launch the program and open the file Yarra23m.xp and from the File menu Save As Yarra30.xp. Toggle the visible box for the DTM layer to improve visibility. Uncheck the visible boxes for the catchments and the catchment connections layers.
Set the Mode to Hydraulics (Hdr) by clicking on the icon . On the drawing tool, click on the Select All Links and Select All Nodes icons and the + icon. Now all the nodes and links will be added to the Hdr mode. Right-click on any link and choose Reverse Direction to swap upstream and downstream nodes for all selected links.
3. Generating ground elevations. From the Tools menu, select Generate Ground Elevations From TIN. In the dialog, uncheck all of the nodes below elevation 1280 and click on OK.
5. Calculate conduit lengths. On the Tools menu, select Calculate Conduit, then Lengths. Click on the All radio button. Click on Calculate. Then click OK.
Select Type of Outlet Control as Type 1, Free Outfall and Use minimum of Yc-Yn.
7. Entering link data in dialogs. Double-click on link Pipe01. Click on Conduit Profile. Alternatively, select the link and press F3 to open the Conduit Profile dialog. The upstream and downstream inverts and the length should have been entered in previous steps. Enter 0.5 m as the pipe diameter. In the Solve for section, select Slope and click on the Solve button. Note this step is not required but serves as a check.
Link U/S Node D/S Node U/S Invert Elevation (m) D/S Invert Elevation (m) Diameter (m) Shape Pipe01 5/4 5/3 1302.894 1299.14 0.5 Circular Pipe02 5/3 5/2 1299.14 1288.924 0.5 Circular Pipe03 6/1 5/2 1289.948 1288.924 0.5 Circular Pipe04 5/2 5/1 1288.924 1280.554 0.65 Circular Pipe05 5/1 3/375 1280.554 1275 0.65 Circular
Pipe06 4/1 Junction 1290.508 1282.289 0.5 Circular
Pipe07 3/2 Junction 1286.398 1282.289 0.5 Circular
Pipe08 Junction 3/1 1282.289 1276 0.65 Circular
Pipe09 3/1 3/375 1276 1275 0.65 Circular
8. Add user inflow to nodes. Double-click on node 3/1 to open the Node Data dialog. Click on the User Inflow button in the Time Series Inflow section. Click on the Insert button 5 times to add 5 blank data rows. Input the hydrograph data as shown in the figure below. This data represents inflow from areas outside of the Yarra model.
9. Add configuration settings. On the Configuration menu, select Job Control and then Hydraulics. Check the box for Run Hydrology/Hydraulics Simultaneously. This option eliminates the need for interface files. Set the Start and Stop times equal to the values used in the Runoff mode. Click OK. Save your model as Yarra31.xp.
10. On the Configuration menu select Mode Properties…. In the Solve Mode section check both RUNOFF and HYDRAULICS.
11. Make the Rnf mode active and make sure that all the links are inactive in the Rnf layer using the Select All Links tool and click on the minus (-) tool. Also make sure that the newly added nodes (apart from the previous runoff nodes 5/2, 5/3, 5/4, 6/1, and 3/2) are inactive in the Rnf mode. 12. Solve the model. On the Analyze menu, select Solve. The application will display the calculation
dialog and return to the network view.
Questions
Review the output file (Yarra31.out) to answer the following questions.
1. What is the total outflow at node 3/375? (Hint: Table E19.) _________
