|Click to download the Introduction [Metric] tutorial model files.|
The network that is being designed is to enter an attenuation pond around Manhole MH14. It has been agreed with the local authorities that an allowable discharge is 10 l/s.
- Continue with your previous file or open ID_Metric_Intro_Tutorial_Ch4.iddx.
- You may want to turn on the Surface from the Tree View to ensure the pond is located on the surface data. Go to the Build ribbon, and then select Add Stormwater Control > Pond. Draw the outline similar to the one shown below, taking care to place it on the surface to allow it pick up the cover levels.
- Right-click MH14, and then select Add Connection > Pipe. Connect the manhole to the pond and you will see the Inlet appear.
- Double-click the Pond to bring up its properties. With Base Level selected, enter 1.5 m as the Depth, then add a row to the table at 1.5 m Depth, entering the same Area of 195.78 m2.
- The pond is currently straight sided but in reality a pond would have sloping sides. Select the Sizing Calculator and in the Method drop-down select Side Slope. Set the Side Slope value to 4 and then press OK.
This adds sloping sides to our pond but it may not be correctly sized, we can also use the Sizing Calculator to set the total volume.
- Before we open the calculator again, set the Freeboard value to 300 mm. It is common practice to avoid designing ponds to top of bank conditions. Select the Sizing Calculator again. Change the Method to Quick Storage Estimate and the Design up to to Freeboard. Press the smaller calculator icon next to the Volume field.
- For Input Type, we can leave it as Use Plan Data which automatically uses the Catchment Area details entered and the Rainfall selected for Analysis. Enter a Discharge Rate of 10 L/s. Click Calculate.
This returns an upper and lower estimate for the storage volume required.
Pressing OK will then take the mean of the two values and put it in the Volume field, clicking OK to the Sizing Calculator will update the pond dimensions.
Note Note: We selected update method Depth / Area / Volume in the previous step which changes both the area, depth and volume of the pond while maintaining the slope. If you were to select Depth, the volume would be altered but the slope would change too.
- Click OK and the Outline has increased to reflect the space the pond will take up on site. You may wish to move the inlet closer to the edge of the pond to get a more accurate pipe length.
- Right-click on the main flow path (labeled Train if you have followed the entire tutorial) in the Tree View and select Edit. Add on the additional pipe from MH14 to the pond.
- From the Results ribbon, select Show Profile and the profile view will now include a graphical representation of the pond. Update the Diameter of the final pipe to 375 mm by double clicking on the value in the table below to match the US pipe. As this was added after the Network Design Wizard it has not been sized.
Adding a Hydro-Brake®
From the previous section, a discharge rate of 10 l/s is permissible from the attenuation pond.
- Double-click on the newly created Pond and select the Outlets tab.
- Currently the pond is setup to only take on water and not discharge it. Click the + icon on the Outlets tab and under Outlet Type, use the drop-down menu to select a Hydro-Brake®.
Enter a Design Depth of 1.2 m and a Design Flow of 10.0 l/s. Press the Calculator then the Calculate button and this will run the analysis via the Hydro International Servers to calculate the appropriate Hydro-Brake, reference number and Depth/Flow relationships available. Click OK to choose the first one in the list.
- Click OK to the form and the site can be re-analysed to assess the design in more details. Further problem solving is discussed in the Advanced Tutorial.
Inserting a Manhole
Inserting a manhole is a very straightforward procedure. From the Build ribbon, select Add Junction and move the target at the point between MH13 and MH14.
- Deselect everything and right-click on the Plan View, and then select Display Settings.
- Select Junction Label colour box and change it to a different colour. Exiting out of the window will then show the labels in the new colour.
- Go to File > Print.
- You can select various data items and then click Update Preview to generate a print preview of the pages.
To export the whole plan, go to the Export ribbon and then select To Image.
Note When saving the image, only the visible layers will be saved.
To export to a CAD file, go to the Export ribbon and then select To CAD.
If you are planning on sending the design to someone (like Innovyze Support). The transmit feature is the best way to do this as it keeps together all relevant files in a compressed format.
Go to File > Transmit Design, and then select the appropriate layers and choose the appropriate destination. And then click OK.
Within InfoDrainage, multiple networks are loaded as “phases” and are accessed through the Phase Management, which is seen in the tree view on the left-hand side of the screen.
In this example, the default phase is used (named “Phase”) but another phase can be added by right-clicking Phase Management and selecting Add Phase. This allows multiple networks to be analysed simultaneously, scenarios compared and such a “pre” and “post” development phase or different design solutions. For more information, refer to Advanced Project - Metric.