Tuflow

Check Files 2d grd: Difference between revisions

Browse history interactively
← Older edit
Content deleted Content added
VisualWikitext
No edit summary
No edit summary
 
(23 intermediate revisions by 4 users not shown)
Line 1:
== Introduction ==
This pagespage contains information on the attributes of the _grd_check file. This GISfile contains a region object for each active (cell code 1) or nullinactive (cell code -1) cell. A number of the output attributes are only written if certain model features are enabled. For example, the '''SRFSoil_ID''' (Storage Reduction Factor) attribute is only included if any SRFsoil commandsfeatures are used in the model.<br>
<br>▼
 
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 TUFLOW manual for a more detailed explanation). These GPU only attributes are noted in the table below.
There are variations in the output attributes for models using Sub-Grid Sampling (SGS) and/or Quadtree. These variations are noted below. <br>
'''Attributes of grd_check'''<br>▼
 
▲'''== Attributes of grd_check'''<br> ==
=== General Attributes ===
{| 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
|-
| n||Row number in the TUFLOW domain.
|-
| m||Column number in the TUFLOW domain.
|-
| 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://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual]</u> for more information on the cell codes.<br>
|-
| Material||The material ID.
|-
| ZC||The cellelevation centrewithin elevationthe cell.
|-
| 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.
|-
| 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 .tcfTCF control file. For a single domain model this will be 1.
|-
| SRF ||The Storage Reduction Factor for the cell.
| 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.mif<br>_uvpt_check_P.shp]]
|-
| 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.
| FLC (GPU model only)||Form loss coefficient, this is only output for a GPU model only as the GPU model is a cell centred scheme and the FLC value is applied at the cell centre. For a TUFLOW "classic" simulation this is applied at the cell side and this is output in the [[Check_Files_2d_uvpt | _uvpt_check.mif<br>_uvpt_check_P.shp]]
|-
| GW_Z_L1 (only if soils are used)||The groundwater level for each cell. This is equal to the elevation in the cell minus the soil thickness. If no soil thickness is specified (using the <tt><font color="blue">Set Soil Thickness</font></tt> TGC command), the attribute will be set to -99999. This attribute is only output if using soils, i.e. if the <font color="blue"><tt>Set Soil</tt></font>, <font color="blue"><tt>Read GIS Soil</tt></font> and/or <font color="blue"><tt>Read Grid Soil</tt></font> TGC command(s) have been used.
| CWF_x (GPU model only)||Cell width factor in the x-direction. This is only output for a GPU model only as the GPU model is a cell centred scheme and the CWF value is applied at the cell centre. For a TUFLOW "classic" simulation this is applied at the cell side and this is output in the [[Check_Files_2d_uvpt | _uvpt_check.mif<br>_uvpt_check_P.shp]]
|-
| IGW_Lvl_L1 (only if soils are used)||The initial groundwater level for each cell. This is equal to the elevation in the cell minus the initial groundwater depth. If no initial groundwater depth is specified (using the <tt><font color="blue">Set IGW Depth</font></tt> TGC command), the attribute will be set to the GW_Z_L1 value. This attribute is only output if using soils, i.e. if the <font color="blue"><tt>Set Soil</tt></font>, <font color="blue"><tt>Read GIS Soil</tt></font> and/or <font color="blue"><tt>Read Grid Soil</tt></font> TGC command(s) have been used.
| CWF_y (GPU model only)||Cell width factor in the y-direction. This is only output for a GPU model only as the GPU model is a cell centred scheme and the CWF value is applied at the cell centre. For a TUFLOW "classic" simulation this is applied at the cell side and this is output in the [[Check_Files_2d_uvpt | _uvpt_check.mif<br>_uvpt_check_P.shp]]
|}
:'''Example _grd_check attribute table:'''
:[[File: 2d_grd_Reg_attribute_table_01.png]]
 
 
=== SGS Specific Attributes ===
{| 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
|-
| SRF (only if SRF feature used)ZMin||The Storageminimum Reductionelevation Factor forwithin the cell.
|-
| Soil_ID (only if soil feature used)Z_Map_Cutoff||The Soilmap IDoutput cutoff elevation for theeach cell. This is onlyequal outputto ifthe aminimum Setcell Soil,elevation Readplus GISthe Soilmap orcutoff Readdepth GRID(specified Soilby the TCF command is<tt><font specifiedcolor="blue">Map forCutoff the simulationDepth</font></tt>).
|-
| SGS_Delta||This attribute is output only if the <font color="blue"><tt>SGS Breakline Detection Delta</tt></font> TCF command has been used. The SGS breakline detection check processes each 2D cell to identify the minimum water surface elevation needed for a continuous wet connection through the cell traversing between left to right and between top to bottom. The maximum invert elevation of the left and right faces is subtracted from the left-right minimum water level and reports it as “uDelta”. Similarly, the top to bottom value is reported as “vDelta”. uDelta and vDelta represent the depth of water over the cell face inverts by which a natural ridge (break) line would block any flow. This attribute reports the maximum of uDelta and vDelta.
|}
:'''Example _grd_check attribute table (using SGS):'''<br>
:[[File: 2d_grd_SGS_attribute_table_01.png]]
 
 
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 page]].<br>▼
=== Quadtree Specific Attributes ===
This allows a very easy way to visualise the final properties for large models.
{| 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
|-
| qpc_id||The quadtree cell ID.
|-
| dx||The size of the cell. This value is dependent on the base cell size and the quadtree nesting level. For example, for a base cell size of 5m and nesting level 2, the dx attribute would be 2.5m.
|}
:'''Example _grd_check attribute table (using Quadtree):'''<br>
:[[File: 2d_grd_Quad_attribute_table_01.png]]
▲<br>
 
== Features ==
▲This file is very useful to apply a style or thematic map to. and Seeit the [[TUFLOW_Check_Files#Tips_for_Visualising_Check_Files| Tipshelps for visualising checkthe final properties for fileslarge page]]models.<br>
<br><br>
AnA grd_check_grd_check file styled by the soilmaterial ID is shown below (in QGIS).<br>
<br><br>▼
[[ File:Grd check SoilID1.JPG]]
[[File:2d_grd_check_01a.png]]<br>
▲<br><br>
<br>
An example of a grid check file shaded by Material ID is below (in MapInfo).<br>
A _grd_check file for a Quadtree model is shown below. It has been styled with the default TUFLOW styling.<br>
[[File:MI thematic map 04.jpg]]
<br>
[[File:2d_grd_check_02a.png]]<br>
<br>
 
{{Tips Navigation
|uplink=[[TUFLOW_Check_Files | TUFLOW Check Files]]
}}
Retrieved from "https://wiki.tuflow.com/Check_Files_2d_grd"