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| | #REDIRECT [[AHGW:Create MODFLOW Cell3D]] |
| The Build Cell3D tool is part of the [[AHGW:MODFLOW Analyst|MODFLOW analyst]] toolset. The tool creates 3D cells (multipatches) based on existing Cell2D features (polygons) and information on the discretization of the MODFLOW grid stored in the modflow data model tables.
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| [[File:AHGW MODFLOW Cell2D and Cell3D features example.jpg|thumb|400px|none|Cell2D and Cell3D features.]]
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| Data from the Discretization and Basic components are used to create three-dimensional Cell3D features from two-dimensional Cell2D polygons.
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| The following tables from the Discretization (DIS) component are used by the Build Cell3D tool:
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| [[File:AHGW BAS6 component used by the Build MODFLOW Cell3D tool.jpg|thumb|600px|none|Tables from the DIS component used by the Build Cell3D tool.]]
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| '''DISVars''' – Defines the model dimension. The following fields must be populated:
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| * NLAY: number of layers.
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| * NROW: number of rows.
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| * NCOL: number of columns.
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| '''TopElev''' – Contains the top elevations of the model cells:
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| * TopElev: top elevation value must be specified for each active cell in the top layer (layer 1). It is optional to have elevation values for inactive cells as well.
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| '''BotmElev''' – Contains the bottom elevations of cells and confining beds (CBD):
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| *BotmElev: bottom elevation must be defined for each active cell (optional to also have elevations for inactive cells).
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| *BotmElevCBD: represents the bottom elevation of confining beds (optional).
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| '''DISLayers''' – Contains layer multipliers. The table should be fully populated (a row for each layer in the model):
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| * LAYCBD: flag for turning on/off confining beds. LAYCBD = 0 confining beds are turned off, LAYCBD = 1 confining beds are turned on.
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| * AM_TopElev: top elevation array multipler.
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| * AM_BotmElev: bottom elevation array multiplier.
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| * AM_BotmElevCBD: bottom elevation of confining beds array multiplier.
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| The following tables from the Basic (BAS6) component are used by the Build Cell3D tool:
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| [[File:AHGW Basic tables for the BuildMODFLOW Cell3D tool.jpg|thumb|300px|none|Tables from the BAS6 component used by the Build Cell3D tool.]]
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| '''Basic''' – Contains the IBOUND and starting head arrays:
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| * IBOUND: defines if cells are active (IBOUND > 0), Inactive (IBOUND = 0), or constant head cells (IBOUND < 0). An IBOUND value should exist for each cell in the model.
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| '''BasicArrayMult''' – Contains IBOUND and starting head layer multipliers. For each layer of the model an IBOUND multiplier should be populated. This value can be used to activate/deactivate selected layers:
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| * IBOUND: A layer multiplier that is appliaed to IBOUND values from the Basic table.
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| == Usage Tips ==
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| * Make sure the Cell2D and Cell3D feature classes have the same length units as the modflow model.
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| == Command Line Syntax ==
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| BuildCell3D <in_cell2d> <in_cell3d> <in_gdb> {active_cells | all_cells}
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| == Parameters ==
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| * Cell2D feature class
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| * Cell3D feature class
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| * Geodatabase file containing the modflow data model tables.
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| * Create Cell3D features for all cells or only active cells (default only active cells)
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| ==Examples==
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| Command Line:
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| <pre>
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| BuildCell3D Cell2D Cell3D in_gdb2 active_cells
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| </pre>
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| Script:
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| <pre>
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| # Build Cell3D features
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| # Requirements: None
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| # Date: 03/21/2008
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| # Import system modules
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| import arcgisscripting, sys, os
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| # Create the Geoprocessor object
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| gp = arcgisscripting.create()
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| gp.AddToolbox("C:/ArcHydroGroundwater/ArcHydroGroundwater.tbx ")
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| try:
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| # set the Cell2D feature class
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| In_cell2d = “C:/Aquaveo/MODFLOW_Simulation.mdb/Cell2D”
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| # set the Cell3D feature class
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| In_cell3d = "C:/Aquaveo/MODFLOW_Simulation.mdb/Cell3D"
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| # set the input geodatabase
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| in_gdb = "C:/Aquaveo/MODFLOW_Simulation.mdb"
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| # Set the Boundary feature class
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| in_active = “true”
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| gp.BuildCell3D(in_cell2d, in_cell3d, in_gdb, in_active)
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| except:
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| # If an error occurred while running the tool, then print the messages
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| print gp.GetMessages()
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| </pre>
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| ==See also==
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| * [[AHGW:MODFLOW Analyst|MODFLOW Analyst]]
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| * [[AHGW:MODFLOW Data Model|MODFLOW Data Model]]
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| {{Navbox AHGW}}
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| [[Category:AHGW MODFLOW Analyst]]
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