View Full Version : Node Invert Calculator

Darrell D
September 21, 2016, 08:03 AM
Our company recently added the InfoSewer software package (InfoSewer Suite 7.6, SP 1, Update #9). Within the InfoSWMM software package there was a tool called "Node Invert Calculator" (screen shot below) which would compute the invert of multiple nodes (manholes) by assigning to it the invert of the connected pipe with the lowest invert. I cannot find this tool or any similar tool within the InfoSewer software. Can anyone provide assistance in finding this tool or performing the operation in some other way. Thanks.

Robert Dickinson
September 21, 2016, 11:13 PM
Hello Darrell,
InfoSewer has different invert needs that InfoSWMM - to summarize
1. You do not enter inverts for nodes in InfoSewer, it uses the invert of the lowest connecting link as the invert of the node, you do not have to compute or use a tool to find the inverts
2. InfoSewer links use absolute link elevations at the upstream and downstream ends of the link
3. InfoSewer uses Rim Elevation (Absolute) as the Rim Elevation of the Node instead of either Max Node Depth or Rim Elevation.
4. InfoSewer has a Pipe Invert Calculator

Robert Dickinson
PS Please feel free to contact us directly at support@innovyze.com if you have any further questions on this issue. We are always glad to help.

Robert Dickinson
September 21, 2016, 11:29 PM
Pipe Invert Calculator

The pipe invert calculator feature of InfoSewerH20Map Sewer allows the user to generate pipe inverts from known slope data for any given number of pipes. The calculator will also retain known pipe inverts during the calculation process, thus providing a complete tool that creates required modeling data from scarce data sources.
How to Use the Pipe Invert Calculator
The following procedure illustrates how to create and populate slope information and utilize that data for the invert calculation process.

Using the DB Editor (file:///C:/Users/dickinre/Desktop/SWMM-SEWER%20Robohelp/SewerCombined/Database_Management/DBEditor.htm), open the Pipe Information table from folder 2. Element Information Table.
Create and append a field in this table and name the new field "Slope". Make this field numeric with at least 6 decimal places.
Save and close the Pipe Information table.
Populate the newly created "Slope" field for all pipes in the system where invert data is not available.
Open the Pipe Invert Calculator and in the Pipe Slope Field drop down box, select the SLOPE field.
Specify any elevation drops across manholes in the system. Most sewer systems in the United States are designed with a 0.1' elevation drop across the manhole.
Specify whether you like to use existing pipe invert elevations in the calculation or overwrite all existing pipe invert data. To retain known pipe invert elevations during the calculation, make sure the "Overwrite Existing Inverts" check box is NOT checked.
To erase all inverts in the system, click on the Reset Inverts button.
Once you have specified these options, enter the invert elevation for all outlets listed in the sewer system. This elevation is usually the invert elevation of the headworks at the sewer treatment plant.
Once you have specified the desired options, click the Calculate button to run the Pipe Invert Calculator and populate all invert data for the sewer collection system.

NOTE: If you have missed or not populated a pipe slope, the slope value is automatically given a value of 0.0000. Thus, the pipe will be calculated as being flat. Depending on your hydraulic condition, this may have adverse affects while running a hydraulic simulation.