Difference between revisions of "Check Files 1d pit A"

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This GIS layer contains information on the 1D pits for the simulation.<br>
 
This GIS layer contains information on the 1D pits for the simulation.<br>
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The values for the 1D tabular boundary data (e.g. time-series) can be found in the [[Check_Files_1d_pit_inlet_tables |_1d_pit_inlet_tables_check.csv file]].<br>
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The values for the 1D tabular pitdata (e.g. time-series) can be found in the [[Check_Files_1d_pit_inlet_tables |_1d_pit_inlet_tables_check.csv]] file.<br>
 
<br>
 
<br>
 
'''Attributes of pit_A_check'''<br>
 
'''Attributes of pit_A_check'''<br>
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| ID||The channel ID.
 
| ID||The channel ID.
 
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| Type||The channel type, see TUFLOW manual for a list of channel types.<br>
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| Type||The pit type, see TUFLOW manual for a list of pit types.<br>
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For example an '''"S"''' type channel is a standard open channel, an '''"R"''' type channel is a rectangular culvert.
 
 
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|-
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| Ignore||If the channel is being ignored (the ignore attribute is set to true on the input 1d_nwk file).
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| VP_Network_ID||Used to determine which outlet(s) the flow into the inlet pits discharges from.
 
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| 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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| 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.
 
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| Len_or_ANA||The length of the channel. <br>
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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.
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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.
 
 
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| 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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| 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).
 
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| US_Invert||The upstream invert for the channel.
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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.
 
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| DS_Invert||The downstream 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.
 
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| 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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| Conn_No||Overwrite the automatically determined number of connected 2D cells.
 
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| pBlockage||The percentage blockage of the channel.
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| pBlockage||The percentage blockage (%) of the pits. Reduces the flow capacity through the pit by the specified amount.
 
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| Inlet_Type||The inlet type for a pit channel.
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| Number_of||The number of pits.
 
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| Conn_1D_2D||The 1D/2D connection type for a pit channel.
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| Invert||The elevation from the 2D cell the pit connects to or that entered via a 1d_nwk layer.
 
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| Conn_No||The connection number 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.
 
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| 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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| i_1d_layer||The integer index of the GIS layer that the pit came from.
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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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|-
 
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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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|-
 
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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>
 
| 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>

Revision as of 11:36, 3 January 2019

This GIS layer contains information on the 1D pits for the simulation.
The values for the 1D tabular pitdata (e.g. time-series) can be found in the _1d_pit_inlet_tables_check.csv file.

Attributes of pit_A_check

Attribute Name Attribute Description
ID The channel ID.
Type The pit type, see TUFLOW manual for a list of pit types.
VP_Network_ID Used to determine which outlet(s) the flow into the inlet pits discharges from.
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.
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.
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).
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.
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.
Conn_No Overwrite the automatically determined number of connected 2D cells.
pBlockage The percentage blockage (%) of the pits. Reduces the flow capacity through the pit by the specified amount.
Number_of The number of pits.
Invert The elevation from the 2D cell the pit connects to or that entered via a 1d_nwk layer.
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.
i_1d_layer The integer index of the GIS layer that the pit came from.
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.

Read GIS Network == mi\1d_nwk_M04_channels_001.MIF
Read GIS Network == mi\1d_nwk_M05_bridge_001.MIF
Read GIS Network == mi\1d_nwk_M07_trunk_998.MIF
Read GIS Network == mi\1d_nwk_M08_pits_001.MIF

pSlope Percentage slope of the channel. A positive slope indicates the upstream invert invert is higher than the downstream invert. For a negative value this indicates that the channel has an adverse slope.

This can be mapped or selected in GIS to highlight areas where the channels may be unrealistically steep.

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