Difference between revisions of "TUFLOW Message 2998"

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|alt_msg=NA
 
|alt_msg=NA
 
|type=[[ERROR]]
 
|type=[[ERROR]]
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|message_desc=Model unstable.  The model has gone unstable in the 2D domain. There are a varieties of reasons that a TUFLOW model may go unstable in the 2D, these can include:<br>
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|message_desc=Model unstable.  The model has gone unstable in the 2D domain. A number of <u>[[TUFLOW_Message_2991|WARNING 2991]]</u> messages may be issued prior to ERROR 2998. There are a varieties of reasons that a TUFLOW model may go unstable in the 2D, these can include:<br>
 
* Poor topography data
 
* Poor topography data
 
* Inappropriate timestep
 
* Inappropriate timestep
 
* Poorly configured external boundary
 
* Poorly configured external boundary
 
* Poorly configured 1D/2D model interface
 
* Poorly configured 1D/2D model interface
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|suggestions=Import the messages layer in to your GIS package. A negative depth can be caused by a number of things, look at the '''_zpt_check''' file to see if there is a steep change in topography, the '''uvpt_check''' shows the Manning's n value at each cell side. Check this roughness suitable.<br>
+
 
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A negative depth can also be caused by a badly behaving boundary condition nearby, check if this is occurring near a boundary.  This can be 1D/2D, a external 2d (such as a HQ boundary) or a 2D/2D boundary.<br>
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|suggestions=Import the messages layer in to your GIS package. Check for the occurrence of <u>[[TUFLOW_Message_2991|WARNING 2991]]</u> messages. The first occurrence of these WARNING messages is the likely location of the source of the problem. Carry out the suggestions as listed for <u>[[TUFLOW_Message_2991|WARNING 2991]]</u> to resolve the instability.
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View the velocity vectors prior to the message are the flow patterns realistic.<br>
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|discussion_page=* [[Talk:TUFLOW Message 2998|Discuss Message 2998]]
 
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|link3=''
 
−
|link4=''
 
−
|prelink=[[TUFLOW_Message_2991|Message 2991]]
 
 
|uplink=[[2xxx_TUFLOW_Messages|2xxx Messages]]
 
|uplink=[[2xxx_TUFLOW_Messages|2xxx Messages]]
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|nextlink=[[TUFLOW_Message_2999|Message 2999]]
 
 
}}
 
}}

Latest revision as of 10:09, 3 March 2023

TUFLOW Message
ERROR 2998 - Model unstable at time ",a,".

Alternate Message
NA

Message Type
ERROR

Description
Model unstable. The model has gone unstable in the 2D domain. A number of WARNING 2991 messages may be issued prior to ERROR 2998. There are a varieties of reasons that a TUFLOW model may go unstable in the 2D, these can include:

  • Poor topography data
  • Inappropriate timestep
  • Poorly configured external boundary
  • Poorly configured 1D/2D model interface

Suggestions
Import the messages layer in to your GIS package. Check for the occurrence of WARNING 2991 messages. The first occurrence of these WARNING messages is the likely location of the source of the problem. Carry out the suggestions as listed for WARNING 2991 to resolve the instability.


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Go-up.png 2xxx Messages
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