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Check Files 1d pit A: Difference between revisions

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This GIS layer contains information on the 1D pits for the simulation.<br>
The values for the 1D tabular boundary datapitdata (e.g. time-series) can be found in the [[Check_Files_1d_pit_inlet_tables |_1d_pit_inlet_tables_check.csv file]] file.<br>
<br>
'''Attributes of pit_A_check'''<br>
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| ID||The channel ID.
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| Type||The channelpit type, see TUFLOW manual for a list of channelpit types.<br>
For example an '''"S"''' type channel is a standard open channel, an '''"R"''' type channel is a rectangular culvert.
|-
| VP_Network_ID||Used to determine which outlet(s) the flow into the inlet pits discharges from.
| Ignore||If the channel is being ignored (the ignore attribute is set to true on the input 1d_nwk file).
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| Inlet_Type||For a VPI or Q pit, the name of a pit inlet type in the Pit Inlet Database. Not used for other pits.
| UCS||The "Use Channel Storage at Nodes" (UCS) setting for the channel. If set to "T" the channel is contributing to the nodal area tables of the connected nodes.
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| VP_Sur_Index||Only used for VPI pits if using the HPC solver. In the event that the total flow into the VPIs on the same VP_Network_ID exceeds the maximum outflow capacity of the VPOs of that VP_Network_ID (see Qmax below), one or more of the VPI flow rates must be modified. The surcharge index is used to determine how VPI flows are adjusted. The VPIs with the lowest surcharge index are given priority.
| Len_or_ANA||The length of the channel. <br>
This can be mapped or selected in GIS to highlight areas where the channels are very short. Short channels (particularly open channels) can drive down the required timestep or introduce stability issues.
|-
| VP_QMax||VPI and VPO if using the HPC solver: For VPOs the maximum flow that can discharge back into the 2D domain. ForVPIs the maximum surcharge capacity or flow back on to the 2D domain. To prevent a VPI from surcharging enter a QMax of 0.0 (zero).
| n_nF_Cd||The Manning’s n value of the channel (for Blank, C, G, I, R, S Channel Types) or Discharge Coefficient (for RG, SG, SP Channel Types).
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| Width||For C pits the diameter of the pit cross-section in the vertical plane. For R and W pits, the width of the pit section in the vertical plane. For all pits the width is used to determine the number of 2D cells to connect.
| US_Invert||The upstream invert for the channel.
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| Conn_2D||Used to control the connection type. For pits this field must be blank or set to “SX”. If set to blank, is treated as a SX connection. Other options maybe provided in the future.
| DS_Invert||The downstream invert for the channel.
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| Conn_No||Overwrite the automatically determined number of connected 2D cells.
| Form_Loss||Any additional form loss applied for the channel. For B channels this can vary with height and this data is in the .eof file.
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| pBlockage||The percentage blockage (%) of the channelpits. Reduces the flow capacity through the pit by the specified amount.
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| Inlet_TypeNumber_of||The inletnumber typeof for a pit channelpits.
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| Invert||The elevation from the 2D cell the pit connects to or that entered via a 1d_nwk layer.
| Conn_1D_2D||The 1D/2D connection type for a pit channel.
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| Q_factor||This is the multiplication factor applied to the discharge to allow for any blockage and/or if Number_of pits is greater than 1.
| Conn_No||The connection number for a pit channel.
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| i_1d_layer||The integer index of the GIS layer that the pit came from.
| Width_or_Dia||The width or diameter of the channel if specified on the 1d_nwk layer. For a channel with a cross-section this is output in the [[Check_Files_1d_hydroprop | 1d_hyroprop_check file]].
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| Height_or_WF||The height or weir factor for the channel (if used).
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| Number_of||The number of channels.
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| HConF_or_WC|| Height contraction coefficient for I and R type channels. For new weir channels if weir coefficient Cd, refer to manual for details on weir equations.
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| WConF_or_WEx||Width contraction coefficient for C, I and R type channels. For new weir channels if weir flow equation exponent Ex, refer to manual for details on weir equations.
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| EntryC_or_WSa||Entry loss coefficient for C, I and R type channels. For new weir channels if weir submergence factor "a", refer to manual for details on weir equations.
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| ExitC_or_WSb||Exit loss coefficient for C, I and R type channels. For new weir channels if weir submergence factor "b", refer to manual for details on weir equations.
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| i_1d_nwk||The index to the input layer that has created the manhole. For example an '''i_1d_nwk''' value of 4 would be the 4th input layer (1d_nwk_M08_pits_001) below.<br>
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