TUFLOW Message 1278: Difference between revisions

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{{TUFLOW_Message
|tuflow_message=ERROR 1278 - Pit <pit ID> inlet level is below lowest channel/pipe bed.<br>
ERROR 1278 - Pit Entry Level = <value>;
Lowest Channel/Pipe Invert = <value>
|alt_msg=WARNING 1278 - Pit <pit ID> inlet level is below lowest channel/pipe bed.
|type=[[ERROR]] <br> [[WARNING]]
|message_desc=The inlet level for the pit is below the lowest connect channel / culvert.
|suggestions=*Check inputs and ensure that invert levels are being correctly specified.<br><br>
*If US_Invert is set to -99999, run the model in a test mode without any 1D elements, 1D/2D links and other 1D related features to produce zpt_check file. Review if Zpts elevation at pit location is reasonable.<br>
'''SGS model''': Users may receive this error after converting a working non-SGS model to an SGS model. In a non-SGS model, the cell elevations are sampled at the cell centres, while an SGS model samples DEM elevations inside the cells based on the SGS sample distance and use the lowest elevations inside the cell as the “pit inlet level”. Therefore, the SGS model might picked up an elevation lower than the pipe invert level. In such case, the "US_Invert" attribute of the 1d_nwk GIS layer can be used to manually specify the ground elevation of the pit. "SXL" option is normally not necessary in an SGS model if the DEM resolution is fine enough
*1D elements can still be read into the model even if they fall outside the 2d_code polygon, provided they are within the model domain. This can result in ERROR 1278 if TUFLOW attempts to assign a 2D elevation at the 1D element’s location (e.g. for pits with any SX attribute where the US_Invert is set to be read or calculated from the 2D elevation) but no 2D cells are available. Removing unnecessary 1D elements that fall outside the active 2D area may resolve the error.<br>
If possible, it is suggested to review the cell size of the model, so that the model doesn't sample an elevation too far away from the pit. Alternatively,
'''SGS model''': Users may receive this error after converting a working non-SGS model to an SGS model. In a non-SGS model, the cell elevations are sampled at the cell centres, while an SGS model samples DEM elevations inside the cells based on the SGS sample distance and useuses the lowest elevationselevation inside the cell as the “pit inlet level”. Therefore, thean SGS model might have picked up an elevation lower than the pipe invert level. In such case, the "US_Invert" attribute of the 1d_nwk GIS layer can be used to manually specify the ground elevation of the pit. "SXL"If possible, optionit is normallyalso notsuggested necessaryto inreview anthe SGScell size of the model, ifso that the DEMmodel resolutiondoesn't issample finean elevation far away from the pit. enough
|discussion_page=* [[Talk:TUFLOW Message 1278|Discuss Message 1278]]
 
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|link4=''
|prelink=[[TUFLOW_Message_1277|Message 1277]]
|uplink=[[1xxx_TUFLOW_Messages|1xxx Messages]]
 
|nextlink=[[TUFLOW_Message_1279|Message 1279]]
}}