TUFLOW Message 2050: Difference between revisions
Content deleted Content added
Created page with '{{TUFLOW_Message |tuflow_message=???? |message_desc="The lowest 2D cell centre elevation (ZC level) at/along the SX 1D/2D interface is above the bed of the connected 1D node or e...' |
No edit summary |
||
| (10 intermediate revisions by 6 users not shown) | |||
Line 1:
{{TUFLOW_Message
|tuflow_message=ERROR 2050 - Lowest ZC elevation at/along SX link is above 1D node bed.
|alt_msg=WARNING 2050 - Lowest ZC elevation at/along SX link is above 1D node bed.
|message_desc="The lowest 2D cell centre elevation (ZC level) at/along the SX 1D/2D interface is above the bed of the connected 1D node or element. The lowest ZC level at or along the 1D/2D interface plus the 2D cell's wet/dry depth must be below the bed of the connected 1D element for SX type 1D/2D connections. SX connections are usually used for embedding small 1D elements such as pipes, culverts and manholes/pits. Treatment of this message as an ERROR or a WARNING is controlled by the ""SX ZC Check"" command. The ZC level of the 2D cell can be automatically lowered using ""Z"" in the Flag attribute for the object - see table of 2d_bc attributes in the manual."▼
|type=[[ERROR]] <br> [[WARNING]]
▲|message_desc=
In the images below, a 1D culvert or a 1D pit inlet is located beneath a road embankment. The images show a cross-section through the embankment, where the brown line represents the 2D ground surface, and the black line represents the culvert (first image) or pit and pipe network (second image). At the downstream location, the model is correctly configured, with the 2D cell lying below the 1D bed level. However, at the upstream location, the 2D elevation (brown line) is above the culvert or pit inlet. This configuration will trigger Error 2050.
<br>
[[File:Error 2050 Image01.JPG|600px]]
|suggestions=*Revise the location of the 1D/2D connection or use a breakline layer to ensure that at the SX connection there is at least 1 cell where the 2D elevation is at or below the 1D bed level.<br>
*The ZC level of the 2D cell can be automatically lowered using "Z" in the Flag attribute for the object - see table of 2d_bc attributes in the manual. However, care needs to be taken as this lowers the cell centre only and does not necessarily create a flow path for water into / out of the connection cell(s). Incorrect use of the "Z" flag can results in stability issues.
*For the 2012-05 release, it is possible for the user to set a maximum change in ZC elevation caused by the use of any "Z" flags for 2D SX links. This allows the modeller to automatically lower 2D cells within the specified limit, but flag an ERROR 2050 if there is a substantial change, which usually indicates there is something inconsistent between the 1D channel bed and the 2D topography.<br>
*If there is a inlet (vertical) structure that allows flow from the ground level to the pipe, a pit structure should be used to represent this.
|uplink=[[2xxx_TUFLOW_Messages|2xxx Messages]]
}}
| |||