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Connections are links between two elements of the Sitesite. They allow a Connection Type to be specified, which will impact the Time of Travel along the Connection and therefore impact the analysis.

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The connections form allows all of the available connections in the phase to be viewed as a table. The spreadsheet then allows the Connection Type and other Physical physical dimensions to be adjusted as required. 

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Change Template - Provides users you with the option to change the currently assigned templates for Connections.

Add To Templates - Provides users you with the option to add the currently selected Connection to the Object Templates library.

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Filtering the tables 

The Filter By drop-down list allows the connections shown to be filtered:

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  • All Connections - Shows all connections.
  • By Flow Path - Shows the connections that make up the selected Flow Paths, and its associated network , in the order of flow. This view is of particular interest as it also allows the Network Design of the pipes & and channels in that network.

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Fields can be turned on or off using the Spreadsheet Preferences form that , which is accessed from the toolbar at the top of the form. The full set of columns available on both the Input and the Results spreadsheet are shown and can be turned on or off using the check boxes. These settings will be remembered between sessions.

Network Design Criteria

Allows the user you to specify the network design criteria to be used to size the pipe/channels along the Flow Path and its network.

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When a Flow Path has been selected on the Filter, it is then possible to perform an Auto Sizing of the pipe/channels that form the network along the flow path. The calculations are completed based on the specified Network Design Criteria when the 'Auto Size' option is clicked. Full details can be found in the Network Design topic page.

Network Design Report 

A table displaying the results of an auto sizing calculation for a given flow path can be displayed, see Network Design Report for more information.

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Downstream Invert Levels less than the minimum of the connection is highlighted. This only occurs if the minimum is valid.

Levels which that break cover will be highlighted. This only occurs if the Min cover depth option is checked in the network design criteria the Network Design Criteria and the minimum cover depth used is valid. The minimum cover depth used is the value in the network design criteria by default, this can be changed on a per connection basis within the connection form.

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    • No Delay - Imposes no effect of on the movement of water.
    • Lagged Flow - Introduces a time delay on the movement of water based on the Time of Travel value entered. Velocity and Time of Travel columns are shown by default.
    • Pipe Connection - Allows a pipe, or series of parallel pipes, to be modelled with a Diameter, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning's n, Diameter/Base Width, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level columns are shown by default.
    • Box Culvert – Allows a Box Culvert, or a series of parallel culverts, to be modelled with a Base Width, Height, Corner Splay, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning’s N, Diameter/Base Width, Height, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level are shown by default.
    • Rectangular Channel - Allows a Rectangular channel, or series of parallel channels, to be modelled with a Base Width, Height, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning's n, Diameter/Base Width, Height, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level columns are shown by default.
    • Trapezoidal Channel - Allows a Trapezoidal channel, or series of parallel channels, to be modelled with a Base Width, Side Slope, Height, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning's n, Diameter/Base Width, Height, Side Slope, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level columns are shown by default.
    • Triangular Channel - Allows a non-symmetrical Triangular channel, or series of parallel channels, to be modelled with a Side Slope, Height, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning's n, Height, Side Slope, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, and Downstream Invert Level columns are shown by default.
    • Custom Connection Allows a custom connection, or series of parallel connections, to be modelled with a Custom Cross Section, Longitudinal Slope, and levels. The dimensions can be entered as required or calculated using the Network Design calculation. Slope, Manning's n, Upstream Cover Level, Upstream Invert Level, Downstream Cover Level, Downstream Invert Level, and the Cross Section columns are shown by default.

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Longitudinal slope of the connection. This is calculated based on the Fallfall, between the upstream & downstream invert levels, along the Length length of the connection. Entering a value for the slope will therefore adjust the downstream invert level.

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Downstream Cover Level

The cover/exceedence , level at the downstream end of the connection. Levels may be set automatically if sufficient data exists, see individual connection type pages for more details.

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The minimum invert level at the downstream end of the connection. This is not required but may be set by the user in order to inform network design/positioning.

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The minimum cover depth of the connection. This is not required but may be set by the user, and will overwrite a global value if set. See Network Design summary wizard page for more details.

Flow Restriction

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Note
Simple Junctions do not have a cover level so a nominal 1 m depth is used.

Auto Size

Lock the padlock to exclude the given connection from Network Design calculations.

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