Vertical Grading Editor
Icon: Menu: CSD Pipes > Vertical Grading Editor Ribbon: Pipes Tab > Edit Panel > VGE
Introduction
The Pipes Vertical Grading Editor is one of the central design features of the software and facilitates the vertical grading of your pipe and pit networks.
To edit the vertical grading of pipes and pits, users start the command and select an upstream pit - the software traces the branch from the upstream pit to the downstream outlet and presents this in the Vertical Grading Editor window.
Multiple pipe/pit branches can be designed simultaneously for any pipe/pit network and interact dynamically with all other pipe/pit networks, including underground service obstructions - this enables the designer to see 'real time' the effect of changing the vertical grading of a pipe/pit on all related pipes and pits across multiple networks.
Pre-Requisites
In order to edit pipes and pits the designer must first have created a Network of the pipe and pit collection.
This command is normally preceded by the Create/Edit Network command. In the case of House Connections and Service Obstructions, a network is created immediately upon creation of these pipe types.
It is recommended also that the Branch Sequence command and Network Labelling Settings commands are executed after creating the network - this allows for branching of the network to be determined as well as the pits and/or pipes to be labelled based on the branch and pit sequencing.
Pipes Vertical Grading Editor - Display
A view of the Vertical Grading Editor is shown, below. Borders and text have been added to highlight the main functional components of the form. Click on a command button or view window from the image for more information:
The main components of the Vertical Grading Editor is as follows (click on the image shown to focus on the details of these tools):
Starting the Vertical Grading Editor
Upon selecting this command, at the Command prompt the user will be asked to "Select Pit on a Network or Press <Enter> to Select from a Network and then a Pit Number".
There are two methods for selecting a part of the network to edit in the Vertical Grading Editor.
Users can either:
Graphically Select a Pit on the Network Graphically select the upstream pit that represents the branch required to be edited using the left mouse button. Upon selecting an upstream pit the software will highlight the pipes to the downstream pit and the following form is displayed:
Form details are as follows:Zoom/Pan Facilitates zooming and panning in the drawing using the Mouse Wheel. Press Enter or Esc to return to this form. Zoom to Pipe Will zoom to the selected pipe to fit the drawing window. OK Select OK to view the pipes and pits for editing in the Pipes Vertical Grading Editor window. If an error is made selecting a pit, users can close the form by clicking on the x at the top right of the form and selecting a different pit at the command prompt.
At the prompt to select a pit in the drawing, press Esc or Enter to stop the command and not open a Pipes Vertical Grading Editor window to edit pipes/pits.
Select a Pit from a List Press <Enter> at the command prompt to select a network At the command prompt "Locate Network Required" the user must graphically select a pipe or pit on the required network. Upon selecting a pipe or pit the following form is displayed:
Form details are as follows:Pit List Select the pit to highlight it. The dashed lines represent the separation of pits into different network branches/lines OK Select OK to view the pipes and pits for editing in the Pipes Vertical Grading Editor window. Common Issues When Selecting a Pit
The following issues and prompts can result when selecting a pit for presentation of a pipe branch in the editor:
Error Message
Cause
The mouse selection point is too far from the location of a pit in the drawing - the software has not detected any pit within the required distance from the selected point. Form details are as follows: Note: Designers are able to set the 'search distance' for locating pits within the vicinity of a selected point in the drawing. This is controlled via the Active Network Settings form.
OK Accepts the error message and stops the command Cancel Accepts the error message and stops the command The designer has selected the most downstream pit in a network. As the software is tracing pits working from the upstream pit to the downstream pit, it is unable to located pipes/pits to present in the Pipes Vertical Grading Editor window. Form details are as follows:
OK Accepts the error message and stops the command Initial Display Controls and General Features
When the Pipes Vertical Grading Editor is first opened it displays as follows:
Users are expected to select a pipe in the lower display window to start the editing and design review process. Hover over a pipe in the lower display window and click the right mouse button to select the pipe for editing.
The Design Values frame contains a collection of geometric, hydraulic and hydrology data important to pipe designers, especially in the design of stormwater/drainage gravity systems. To suppress the display of the Design Values frame, designers can click on the Hide Data icon. The icon will change display and designers can click on the Expand Data icon to re-display the Design Values frame.
There are a number of benefits to using the Pipes Vertical Grading Editor. They include:
- Re-scalable Form - change the vertical exaggeration and width of the form simply by dragging at the corner of the window
- Always on Top - the form is always on top, except when an CSD, AutoCAD or Civil 3D command is detected, when it will momentarily minimise
- Dynamic Updating - multiple pipe network branches can be viewed in separate Pipes Vertical Grading Editor windows and crossing pipes are dynamically represented on each VGE window.
- Pipe Grading Tracker - the software includes a 'tracker' in the model space to display the current location when hovering inside a Pipes Vertical Grading Editor window
The green 'tracker' symbol traces along the pipe to show the designer the current location in the model whilst vertically grading the pipe network branch.
Command Controls
Below are all the command and display controls of the Pipes Vertical Grading Editor.
The Pipes Vertical Grading Window
The portion of the Vertical Grading Editor form provides a vertical representation of the pipe and pit branch selected. It is used to select the pipe to edit, as well as setting the location for inserting new pits and co-ordinating the plan marker.
Display Controls
Pipes are displayed graphically and pits are identified with a vertical line. The Pipes Vertical Grading Window displays the following information:
Text Colour(s) Pipe grades, pipe slope, number of pipes, pipe class and/or pipe identifier (displayed at the top of the window). Note: The information displayed is configurable from the Display Settings form. Yellow, Green, Green Chainage, top of pit level and pipe invert (displayed at the pits on a 90° angle) Green Surface Display Existing Surface Green Design Surface White Surface at Depth (from Existing surface or Design Surface) Varies Branch Pipe and Pit Display Pit centreline vertical line Green Pipes (invert and obvert) and pits of the selected branch Yellow, Light Yellow Pipe clearance (cover) line (display control on/off) Yellow The current pipe highlighted for editing is highlighted Light Blue Crossing Pipes and Service Obstructions Incoming and outgoing pipes to a pit are denoted with a ] symbol and text describing the invert level of the pipe and the pipe diameter, separated by a space. Cyan Crossing Pipes (including clearances) that do not cross the design pipe Dark Blue Service Obstructions (including clearances) that do not cross the design pipe Pink Crossing pipes and Service Obstructions that interfere (are inside the clearance) with the design pipe Red For Drainage Networks Hydraulic Grade Line (HGL) displayed for the design storm (minor storm, by default) Magenta Hydraulic Grade Line (HGL) displayed for a user selected storm Pink Pit Surcharge - a number will be displayed above a pit. This value represents the lowest ARI resulting in pit surcharge at that pit location. Only the most upstream surcharging pit will be displayed Red For Sewer Networks House/Property Connections and text Grey Edit Controls
Click on the right mouse button when hovered over a pipe to select it for editing. Alternately use the Show Previous or Show Next icons to highlight the preceding/next pipe for editing.
The window is also used to:
- graphically select the position to insert a new pipe/pit after the button is selected.
- graphically select the upstream or downstream end of a pipe to adjust it to match the obvert of the next upstream/downstream pipe at the nearest pit after the button is selected.
Pipe and Pit Editing Tools
For any selected pipe, the Pipe and Pit Editing Tools allow the user to:
- Edit the upstream and/or downstream pipe elevations
- Edit the pipe grade and pipe type
- Edit the upstream and/or downstream pits joining the pipe
- Insert in-line pits in the network where required
Note: The 'downstream' and 'upstream' pits are more accurately described as the ''pit at start of pipe" and "pit at end of pipe" - users are able to edit the pipe elevations for the pipe fall to change flow direction to be away from the appointed 'downstream pit'.
For a selected pipe, there are three components that can be edited:
Downstream Pit
Displays details regarding the downstream pit as well as providing tools to edit or delete the pit
ID
This displays the pit identifier.
Chainage This displays the chainage of the pit, measured from the downstream outlet pit. Min Drop This displays the minimum drop (mm) of all pipes connected to this pit. Max Drop
This displays the maximum drop (mm) of all pipes connected to this pit.
Edit Pipe Properties Click to edit the pit properties including pit top level, pit bottom level and pipe level constraints.
The functionality in this form matches the functionality as described in the Edit Pit Properties command EXCEPT that the pit plan location control is disabled. Click on the image or click here to view the details of this command.
Click OK or Cancel to return to the Vertical Grading Editor.
Delete Pit Click on this icon to delete the downstream pit of the highlighted pipe. A confirmation message will display - click OK to confirm deletion of the pit. Note: users will not be permitted to delete a pit at a junction, the downstream pit or pit immediately preceding the downstream pit. Error messages will display for these occurrences and the pit will not be deleted. Click OK to exit the forms. Downstream Pipe Invert Edit the pipe elevation at the downstream pit Set Downstream Pipe Invert Level Clicking on this icon enables manual setting of the pipe invert:
New Invert Level Type in the pipe invert elevation. OK Set the new pipe elevation at the pit centreline and return to the Vertical Grading Editor window. Cancel
Exit the form without editing the pipe elevations.
Pipe Invert Level This greyed out field describes the current invert of the pipe, measured at the pit centreline Depth to Invert This greyed out field describes the depth to invert for the pipe, taken as the distance from the pipe invert to the nominated Design surface and measured at the pit centreline. Lock Icon (Level Set by User) Indicates that the user has manually set the elevation of the downstream pipe at the pit. This icon will only display if the user has manually set the elevation of the downstream pipe. Note: Users can revert to the default design settings for the pipe elevation from the Edit Pipe Properties or Set/Clear Lock Status on Pipes commands. Raise Downstream Pipe by Increment Move the pipe up by the Up/Down Increment (m) value. Note: if the pipe level has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this control. Lower Downstream Pipe by Increment Move the pipe down by the Up/Down Increment (m) value. Note: if the pipe level has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this control. Up/Down Increment (m)
The amount that the pipe end will raise/lower upon selection of the controls. Type in the value required, measured in metres. Pipe Edit the pipe elevations, the pipe size and type and the pipe grade. Insert new pits in the pipe. ID This displays the pipe number assigned by the software. Length This displays the pipe length and is a non-editable field. Slope (%) or Slope 1: This displays the pipe grade (%) or pipe slope (1:) and is a non-editable field. Note: The method of slope input is controlled via the Active Network Settings form. Users can select the slope input method pending the network type. Edit Pipe Properties
Excepting extra controls in the Edit Pipe Properties command to edit the Pipe Class, Pipe Item and Number of Pipes, this form matches the functionality as described in the Edit Pipe Properties command. Click on the image or click here to view the details of this command.
Raise Pipe by Increment Move the entire pipe up by the Up/Down Increment (m) value.
Note: if the pipe level at either end has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this controlLower Pipe by Increment Move the entire pipe down by the Up/Down Increment (m) value. .
Note: if the pipe level at either end has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this controlUp/Down Increment (m)
The amount that the pipe will raise/lower upon selection of the controls. Type in the value required, measured in metres. Set Pipe Grade Click on this icon to open the following form:
or
Note: The slope input (either % or 1:) is controlled via the Active Networks Settings form. Users can select the slope input method pending the network type.Toggle to select the desired slope edit method. Options include:
Set Slope from Downstream (% or 1:) Type in the required grade. The downstream pipe elevation will be maintained and the upstream pipe elevation will be adjusted to achieve the set pipe grade. Set Slope from Upstream (% or 1:) Type in the required grade. The upstream pipe elevation will be maintained and the downstream pipe elevation will be adjusted to achieve the set pipe grade. Set Level from Ground (apply cover) Adjusts the pipe elevation at both start and end to achieve the minimum required cover (as set in the Active Network Settings form) Use Ground Slope from Downstream Calculates the instantaneous slope measured at the centreline of the downstream pit and applies this slope to the pipe, maintaining the downstream pipe level and adjusting the upstream pipe level Use Ground Slope from Upstream Calculates the instantaneous slope measured at the centreline of the upstream pit and applies this slope to the pipe, maintaining the upstream pipe level and adjusting the downstream pipe level OK Apply the pipe grade change and return to the Vertical Grading Editor window. Cancel Exit the form without editing the pipe levels. Set Multiple Pipe Grades Click on this icon to open the following form:
Set the desired slope edit methods and extents. Options include:Set Slope from Downstream (%)
Type in the required grade.
Range Select the pipes to have their slopes adjusted On screen Adjust pipe slopes shown on VGE window Chainages Type in a chainage range for pipe selection Pick Range Pick range off the VGE window (on exit from the form) Upstream Settings Allows designers to pick to apply pipe slope changes upstream from a start chainage, by setting an invert level for the pipe at the start chainage. Work Upstream If unticked, works from the upstream pipe end to apply slope controls. This can be overwritten by cover controls If ticked, works from the downstream pipe end (start chainage) to apply slope controls. Following controls must then be set:
Maintain Drops Maintain pit drops if ticked on. If ticked off, no pit drop is applied New Starting Level Set a pipe invert level to apply at the selected start chainage OK
Apply the pipe grade changes and return to the Vertical Grading Editor window.
Cancel
Exit the form without editing the pipe levels.
Match Obverts at a Pit Click on this icon to edit the upstream or downstream end of a pipe to match the obvert level of the next upstream or downstream pipe at the pit. This command works on any pipe displayed in the Vertical Grading Editor window, except for the upstream end of the most upstream pipe or the downstream end of the most downstream pipe shown in the Vertical Grading Editor.
Upon selecting this command prompt in the Vertical Grading Editor Reporting Panel will prompt 'Select Level to Change (just Downstream or just Upstream of Pit)'.
Use the mouse to graphically and click the left mouse button to select one end of a pipe that is located close to a pit to change and set the obvert level of that end of the pipe. The obvert level will be adjusted to match the obvert level of the next downstream (if the downstream end of the pipe was selected) or upstream (if the upstream end of the pipe was selected) pipe located at the pit.
An example of the command is shown, below:
After starting the command. Select the end to change. Adjustment after selecting the end of the pipe to change Upon completion of the command the end of the pipe will have it's obvert level set to match. This will set the pipe level for the end of the pipe that is selected.
Note: If the next upstream or downstream pipe does not have its level at the pit set then the upstream or downstream pipe may be further adjusted after the obverts are matched to maintain either the cover, pit drop, minimum grade, capacity or velocity controls. If the next upstream or downstream pipe is adjusting so the obverts do not match you will need to set the levels of this end of the pipe.
Insert Pit on Current Pipe Click on this icon to insert a new pit in line with the currently highlighted pipe.
Upon selecting this icon the command prompt in the Vertical Grading Editor Reporting Panel will prompt 'Select Pit Insert Position'. Use the mouse to graphically position a location for the pit and click the left mouse button to make the selection.
Note: Selecting a location in the Vertical Grading Editor window that is not within the chainage range of the currently highlighted pipe will result in an error message being displayed and the pit will not be inserted. Click OK to exit the message and restart the command.
Upon selecting a valid location for the pit the following form will display.
Selected Chainage is
If required, over-type the chainage required for a new pit to be inserted. The chainage in the field is reported from the location selected by the user.
OK
Insert a new pit and return to the Vertical Grading Editor window. Note: If a chainage is typed in that is not within the chainage range of the current pipe an error message will be displayed and the pit will not be inserted.
Cancel
Exit the form without editing the pipe levels.
Review the assigned pit family and pit type applied. The assigned Pit Family and Pit Type is controlled from the Active Network Settings.
Class This displays the Pipe Class. Use the pick list to select the required Pipe Class. Diameter This displays the Pipe Identifier. Use the pick list to select the required Pipe Identifier. # of Pipes This displays the number of parallel pipes being applied. This cell cannot be edited in the Vertical Grading Editor. To increase the number of parallel pipes being applied, exit the Vertical Grading Editor and start the Edit Pipe Properties command. Set by User This is a toggle button. It is automatically ticked on if the user selects a particular Pipe Class and/or Pipe Diameter and/or sets the number of pipes. To restore the system to automatically assign the appropriate pipe size, untick the Set box.
Note: The Drainage design process includes the sizing of pipes based on the pipe inflows. Setting the pipe elevations at start or end may affect the automatic pipe resizing.Upstream Pit
Edit the pipe elevations at the upstream pit, move the upstream pipe up/down by increments, edit the pit properties or delete the pit
ID This displays the pit number/name Chainage This displays the chainage of the pit, measured from the downstream outlet pit Edit Pipe Properties Click to edit the pit properties including pit top level, pit bottom level and pipe level constraints
The functionality in this form matches the functionality as described in the Edit Pit Properties command EXCEPT that the pit plan location control is disabled. Click on the image or click here to view the details of this command.
Delete Pit Click on this icon to delete the upstream pit of the highlighted pipe. A confirmation message will display - click OK to confirm deletion of the pit. Note: users will not be permitted to delete a pit at a junction, the downstream pit or pit immediately preceding the downstream pit. Error messages will display for these occurrences and the pit will not be deleted. Click OK to exit the forms. Upstream Pipe Invert Edit the pipe elevation at the upstream pit Set Upstream Pipe Invert Level Clicking on this icon enables manual setting of the pipe invert:
New Invert Level Type in the pipe invert elevation. OK Set the new pipe elevation at the pit centreline and return to the Vertical Grading Editor window. Cancel Exit the form without editing the pipe elevations. Pipe Invert Level The greyed out number describes the current invert of the pipe, measured at the pit centreline. Depth to Invert This greyed out field describes the depth to invert for the pipe, taken as the distance from the pipe invert to the nominated Design surface and measured at the pit centreline. Lock Icon (Level Set by User) Indicates that the user has manually set the elevation of the upstream pipe at the pit. This icon will only display if the user has manually set the elevation of the upstream pipe. Note: users can revert to the default design settings for the pipe elevation from the Edit Pipe Properties or Set/Clear Lock Status on Pipes commands. Raise Upstream Pipe by Increment Move the pipe up by the Up/Down Increment (m) value. Note: if the pipe level has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this control Lower Upstream Pipe by Increment Move the pipe down by the Up/Down Increment (m) value. Note: if the pipe level has been set as a depth to the top of pit or a depth to surface the user will be prompted to override this control Up/Down Increment (m)
The amount that the pipe start will raise/lower upon selection of the controls. Type in the value required, measured in metres.
Reporting Panel
Command Line The prompt in the command line change as commands are selected. This field alerts the user when an input is required from the user. OK Apply all changes in the Pipes Vertical Grading Editor and exit. Cancel Exit the form without applying changes made in the Pipes Vertical Grading Editor window.
Navigation Tools
The Navigations Tools primarily facilitate control of what is displayed in the Pipes Vertical Grading Window. The navigation tools and command details are as follows:
Display Settings The following form is displayed and inputs are as follows:
Show Cover Above Pipe Toggle this on to show a line above the pipe representing the pipe cover required Additional HGL Period Use the pick box to select a sampled rainfall ARI to display this as an additional Hydraulic Grade Line in the Vertical Grading Editor window Show Depths Below Design Surface Toggle this on to show up to three copies of the Design Surface at varying depths below the Design Surface Depths Three depths are able to be shown. Type in non-zero positive values to show copies of the Design Surfaces at the set depths below the Design Surface. Depth values are in metre units and positive values are taken below the surface. Show Depths Below Existing Surface Toggle this on to show up to three copies of the Existing Surface at varying depths below the Design Surface Depths Three depths are able to be shown. Type in non-zero positive values to show copies of the Design Surfaces at the set depths below the Design Surface. Depth values are in metre units and positive values are taken below the surface. Line 1 Users are able to control what textual information is displayed on the first line of text displayed at the top of the Vertical Grading Editor Window Pick Lists Up to four (4) text parameters can be labelled on the first line. Parameters are displayed left-right, then top-bottom. Use the pick list to select the parameter to display. List of available parameters are:
- Pipe Identifier: displays the pipe Identifier information as described in the Active Network Settings, General > Pipe Tables tab.
- Pipe Class: displays the pipe Class information as described in the Active Network Settings, General > Pipe Tables tab
- Slope %: displays the slope information for the current pipe represented as a percentage grade
- Slope 1:: displays the slope information for the current pipe represented as a grade (rise:run)
- Number of pipes: if more than one pipe is selected, a number will be displayed (eg: 2x representing two parallel pipes)
Note: Leave the pick box blank if a parameter is not required.
Line 2 Users are able to control what textual information is displayed on the second line of text displayed at the top of the Vertical Grading Editor Window Pick Lists Up to four text parameters can be labelled on the second line. Parameters are displayed left-right, then top-bottom. Use the pick list to select the parameter to display. List of available parameters are:
- Pipe Identifier: displays the pipe Identifier information as described in the Active Network Settings, General > Pipe Tables tab.
- Pipe Class: displays the pipe Class information as described in the Active Network Settings, General > Pipe Tables tab
- Slope %: displays the slope information for the current pipe represented as a percentage grade
- Slope 1:: displays the slope information for the current pipe represented as a grade (rise:run)
- Number of pipes: if more than one pipe is selected, a number will be displayed (eg: 2x representing two parallel pipes)
Note: Leave the pick box blank if a parameter is not required.
OK Exit and apply the settings changes. Cancel Exit the form without applying changes made in the Settings window. Set/Clear Lock Status on Pipes The software will automatically assign pipe elevations based on geometric and hydraulic (for drainage networks) or house/property connection (for sewer network) controls. Users often want to manually set the pipe elevations. This form enables quick removal or application of user override control of the pipe elevations and diameters. The following form is displayed and inputs are as follows:
Select Action - Clear or Unclear Toggle whether to clear all the User Set pipe elevations, or else set all the pipe elevations for manual adjustment. When pipe elevations are not Set, the pipe cover, slope and other design rules apply to establish the design pipe elevations. Clear Settings Toggle this option on to remove all the user overrides of pipe elevations Set Level Settings Toggle this option on to lock all pipe elevations to be user controlled and not adjusted by the software Settings Range Specify which pipes in the network should be affected by the Select Action control (above). Options include: Pipes (entirely) on Screen All pipes currently displayed in the Vertical Grading Editor window will be affected. Current Branch All pipes opened in the Vertical Grading Editor will be affected. Current Network All pipes in the network will be affected Pipes within Chainage Range Type in the chainage range in the input cells. Type the Start Chainage in the top cell and End Chainage in the bottom cell - pipes located within that range will be affected OK Exit the form to apply the changes. On clicking OK the following confirmation form is displayed:
Yes Continue and apply the changes No Exit and do not apply the changes Cancel Exit the form without applying changes made in the Settings window. Zoom In Zoom in by 25% Zoom Out Zoom out by 25% Zoom Pipes This zoom enables the user to zoom to a selected number of pipes to be displayed in the Vertical Grading window. The following form is displayed and inputs are as follows:
Use the toggle options to select whether to zoom to a number of pipes or a set distance
Pipes Use the pick list to select the number of pipes to display either side of the highlighted pipe. This zoom control will be persistent until another zoom option is selected - toggling to the next or previous pipe for editing will maintain the number of pipes either side. Distance Type the distance (m) to display either side of the current centre of the display window. OK Exit and apply the zoom control. Cancel Exit the form without applying changes made in the Pipes Vertical Grading Editor window. Pan Select this to pan in the drawing. Click two locations to complete the pan action. Note: If no command is active, the middle mouse button works as a pan Zoom Extents Zoom to the full extents of the pipes selected for the Vertical Grading Window Zoom Window Click twice to select the corners of the window to zoom to. Centre to Point Repositions the centre of the window display to the selected location. Refresh Refreshes the display of all pipes and pits in the window. Undo Undo previous actions taken in the current session of the Pipes Vertical Grading Editor. Redo Redo previous actions undone using the Undo command, above Chainage and Level This is descriptive information of the current mouse location within the Vertical Grading window. Chainage is as measured from the downstream pit (outlet) Chn describes the chainage. Lev describes the level. Vertical Exaggeration The current vertical exaggeration is noted by VE and followed by a number - this represents the current exaggeration applied. Use the pick list to select a preferred vertical exaggeration. Up/Down Increment (m)
This is the amount that pipes are raised/lowered when the raise/lower (by increment) commands are applied in the pipe/pit editing tools. Highlight Next Pipe Click to highlight the next upstream pipe for editing Highlight Previous Pipe Click to highlight the next downstream pipe for editing
Pipe Design Panel
The Pipe Design Tools provide important reporting information regarding the pipe geometry as well as the pipe hydraulics. The data displayed in this expandable form will be subject to the type of Network being created - only the Drainage network includes data reporting on the pipe hydraulics.
Expand Data If the Design Values are not displayed, click on this icon to expand the form to display the Design Values. Hide Data When the Design Values are displayed, click on this button to hide them Design Values Excepting the pit loss coefficient override, this is a collection of non-editable reporting fields describing the pipe attributes. Flow (l/s) Drainage Networks - Calculated flow from the hydrology Mannings Capacity (l/s) Drainage Networks - Pipe Flow capacity calculated using the Manning's formula for calculating velocity (V). This is the discharge as calculated via the Mannings formula assuming the pipe is running full but not under pressure. HGL Capacity (l/s) Drainage Networks - Pipe Flow capacity calculated using the Colebrook-White equation. Accounts for pipe running full and under pressure. Mannings Roughness Drainage Networks - The Mannings formula is used to calculate partial flow in the pipe and for the partial velocity calculations. The Mannings constant, n, is reported here. This value is set in the Active Network Settings. Pipe Roughness Drainage Networks - The Pipe Roughness is used in calculating pipe flows based on the Colebrook-White equation. The Pipe Roughness, ε, is reported here. This value is set in the Active Network Settings. Velocity (m/s) Drainage Networks - Displays the pipe velocity. Part Velocity (m/s) Drainage Networks - Displays the pipe velocity (allowing for the pipe not running full) using Mannings formulae Velocity Head (m) Drainage Networks - This is calculated as per the Bernoulli's Principle. Assuming full flow - v²/2g Part Flow Depth (m) Drainage Networks - depth of flow Friction Slope (%) Drainage Networks - This is a calculated field from application of the Colebrook-White equation Upstream Cover (m) Displays the cover to the pipe at the upstream pit centreline Downstream Cover (m) Displays the cover to the pipe at the downstream pit centreline Minimum Cover (m) Displays the minimum pipe cover detected along the entire pipe length Upstream Obvert (m) Displays the pipe obvert at the upstream pit centreline Downstream Obvert (m) Displays the pipe obvert at the downstream pit centreline Friction Loss (m) Drainage Networks - Calculates and displays the length of pipe times the Friction Slope (%) Downstream Pit Loss (m) Drainage Networks - This is calculated as the Velocity Head times the Downstream Pit Loss Coefficient Downstream Pit Loss Coefficient Drainage Networks - Displays the calculated pit loss coefficient into the downstream pit. Uses both Missouri and Hare's formulae for calculating the loss. Downstream Pit Loss Coefficient Override Click on this icon to set a pit loss coefficient override. This override will be used instead of the automatically calculated Downstream Pit Loss Coefficient. Details of the form are as follows:
Use the toggle options to select whether to set the pit loss coefficient or for it to be calculated
Set Pit Coefficient Type in the value required - valid ranges are -3 to 18 Use Computed Values Uses software calculations to determine the pit loss coefficient. Pit loss coefficients are based on. OK Exit and apply the pit loss coefficient. Cancel Exit the form without applying changes to the pit loss coefficient.