Check Files 2d grd: Difference between revisions
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This pages contains information on the attributes of the _grd_check file. This GIS contains a region object for each active (cell code 1) or null (cell code -1) cell. A number of the output attributes are only written if certain model features are enabled. For example, the '''SRF''' (Storage Reduction Factor) attribute is only included if any SRF commands are used in the model.<br>
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There are a number of attributes that are only output for TUFLOW GPU models, as the GPU model is a cell centred scheme certain properties such as Manning's roughness and Form Loss are applied at the cell centre, whilst in TUFLOW these are applied at the cell side (refer to the <u>[https://downloads.tuflow.com/TUFLOW/Releases/Latest/TUFLOW%20Manual.pdf TUFLOW
'''Attributes of grd_check'''<br>
{| align="center" class="wikitable" width="75%"
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| m||Column number in the TUFLOW domain
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| Code||The cell code status. This is 1 for active cells and -1 for null cells that are included in the mesh. Refer to the <u>[https://downloads.tuflow.com/TUFLOW/Releases/Latest/TUFLOW%20Manual.pdf TUFLOW Manual]</u> for more information on the cell codes.<br>
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| Material||The material ID.
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| IWL||The initial water level value. If the initial water level set in the model is below the cell elevation (ZC) or if no initial water level has been set, the cell elevation plus the model wet / dry depth is output. Note, this value is rounded to 3 decimal places.
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| Domain_Index||The index of the model domain. This is the order with <tt><font color="blue">Start 2D Domain</font><font color="red"> == </font><Domain Name></tt> commands appears in the
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| Mann_n (GPU model only)||The Manning's n value for the cell. This is only output for a GPU model only as the GPU model is a cell centred scheme and the Manning's n value is applied at the cell centre. For a TUFLOW "classic" simulation the Manning's is applied at the cell side and this is output in the [[Check_Files_2d_uvpt | _uvpt_check<br>_uvpt_check_P]]
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| SRF (only if SRF feature used)||The Storage Reduction Factor for the cell.
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| Soil_ID (only if soil feature used)||The Soil ID for the cell. This is only output if a <font color="blue"><tt>Set Soil</tt></font>, <font color="blue"><tt>Read GIS Soil</tt></font> or <font color="blue"><tt>Read GRID Soil</tt></font> command is specified for the simulation.
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This file is very useful to apply a style or thematic map to. See the [[TUFLOW_Check_Files#Tips_for_Visualising_Check_Files| Tips for visualising check files
This allows a very easy way to visualise the final properties for large models.
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An grd_check file styled by the soil ID is below (in QGIS).<br>
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[[ File:Grd check SoilID1.JPG]]
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An example of a grid check file shaded by Material ID is below (in MapInfo).<br>
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[[File:MI thematic map 04.jpg]]
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{{Tips Navigation
|uplink=[[TUFLOW_Check_Files | TUFLOW Check Files]]
}}
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