View source for Check Files 1d pit A

This GIS layer contains information on the 1D pits for the simulation.<br>
The values for the 1D tabular pit data (e.g. time-series) can be found in the [[Check_Files_1d_pit_inlet_tables |_1d_pit_inlet_tables_check.csv]] file.<br>
<br>
'''Attributes of pit_A_check'''<br>
{| align="center" class="wikitable" width="75%"
! style="background-color:#005581; font-weight:bold; color:white;"| Attribute Name
! style="background-color:#005581; font-weight:bold; color:white;" width=75%| Attribute Description
|-
| ID||The pit ID.
|-
| Type||The pit type, see the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u> for a list of pit types.<br> 
For example a "Q" stands Q pit, while a "Q(VPI)" type is a Virtual Pipe Inlet.
|-
| VP_Network_ID|| Virtual Pipe Network ID (as an integer) 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 (see Qmax below), one or more of the VPI flow rates must be modified. The VPIs with the lowest surcharge index are given priority.
|-
| VP_QMax||Only used for VPI and VPO if using the HPC solver. For VPOs the maximum flow that can discharge back into the 2D domain. For VPIs 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.
|-
| 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.
|-
| Lag_Approach||Sets the lag approach. <br>
*'''None''' or blank: No lag is applied.
*'''Shift''': Shift method applied.
*'''Decay''': Decay method applied.
|-
| Lag_Value||Lag value in hours. 
|-
| 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. For example an i_1d_nwk value of 4 would be the 4th input layer (1d_nwk_M08_pits_001) below.<br>
<font color="blue"><tt>Read GIS Pits </tt></font> <font color="red"><tt>==</tt></font><tt> 1d_nwk_M04_pits_001_P</tt><br>
<font color="blue"><tt>Read GIS Pits </tt></font> <font color="red"><tt>==</tt></font><tt> 1d_nwk_M05_pits_001_P</tt><br>
<font color="blue"><tt>Read GIS Pits </tt></font> <font color="red"><tt>==</tt></font><tt> 1d_nwk_M07_pits_998_P</tt><br>
<font color="blue"><tt>Read GIS Pits </tt></font> <font color="red"><tt>==</tt></font><tt> 1d_nwk_M08_pits_001_P</tt>
|}


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