GMS:FEMWATER Point / Arc Properties: Difference between revisions
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:*''Variable flux'' – If this option is selected, a flux value is assigned to the arc. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all vertical element faces on the boundary of the mesh beneath the arc are marked as variable boundary faces. If a flux value of zero (the default value) is assigned, the element faces represent a seepage face boundary where below the water table, the head is set equal to the elevation. | :*''Variable flux'' – If this option is selected, a flux value is assigned to the arc. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all vertical element faces on the boundary of the mesh beneath the arc are marked as variable boundary faces. If a flux value of zero (the default value) is assigned, the element faces represent a seepage face boundary where below the water table, the head is set equal to the elevation. | ||
:''Contaminant'' – The ''Contaminant'' option is used to model concentration or mass flux boundary conditions. This option is selected in the ''Transport bc'' column in the spreadsheet. The available options are: | :'''Contaminant''' – The ''Contaminant'' option is used to model concentration or mass flux boundary conditions. This option is selected in the ''Transport bc'' column in the spreadsheet. The available options are: | ||
:''Specified concentration'' – If this option is selected, a concentration value is assigned to the arc using the ''Concentration flux'' column. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all mesh nodes on the boundary of the mesh beneath the arc are found and the specified concentration is assigned to the nodes. | :'''Specified concentration''' – If this option is selected, a concentration value is assigned to the arc using the ''Concentration flux'' column. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all mesh nodes on the boundary of the mesh beneath the arc are found and the specified concentration is assigned to the nodes. | ||
:''Specified mass flux'' – If this option is selected, a mass flux value is assigned to the arc using the Mass flux column. When the [[GMS:Map to Models#Map to FEMWATER|'''''Map → FEMWATER''''']] command is selected, all vertical element faces on boundary of the mesh beneath the arc are found and the specified mass flux rate is assigned to the faces. | :'''Specified mass flux''' – If this option is selected, a mass flux value is assigned to the arc using the Mass flux column. When the [[GMS:Map to Models#Map to FEMWATER|'''''Map → FEMWATER''''']] command is selected, all vertical element faces on boundary of the mesh beneath the arc are found and the specified mass flux rate is assigned to the faces. | ||
:''Variable (concentration)'' – If this option is selected, a concentration value is assigned to the arc using the ''Concentration'' column. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all element faces on the boundary of the mesh beneath the arc are found and the specified concentration is assigned to the faces as a variable type boundary condition. Note that this boundary condition can be used in conjunction with any of the three options for specified head/fluid flux. The proper use of this type of boundary condition is explained in the [http://gmsdocs.aquaveo.com/Femwater.pdf FEMWATER Reference Manual]. | :'''Variable (concentration)''' – If this option is selected, a concentration value is assigned to the arc using the ''Concentration'' column. When the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected, all element faces on the boundary of the mesh beneath the arc are found and the specified concentration is assigned to the faces as a variable type boundary condition. Note that this boundary condition can be used in conjunction with any of the three options for specified head/fluid flux. The proper use of this type of boundary condition is explained in the [http://gmsdocs.aquaveo.com/Femwater.pdf FEMWATER Reference Manual]. | ||
:''Assigning to Zones'' – The ''Zone'' column is used to determine how the boundary conditions are applied to the nodes and element faces when the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected. By default, the boundary conditions are assigned to all nodes and element faces beneath the arc. However, in some cases it is useful to restrict the boundary condition to only a portion of the vertical boundary beneath the arc. This can be accomplished by selecting the Selected zones only option and marking the material zones where the boundary condition is to be applied. | :'''Assigning to Zones''' – The ''Zone'' column is used to determine how the boundary conditions are applied to the nodes and element faces when the [[GMS:Map to Models#Map to FEMWATER|'''Map → FEMWATER''']] command is selected. By default, the boundary conditions are assigned to all nodes and element faces beneath the arc. However, in some cases it is useful to restrict the boundary condition to only a portion of the vertical boundary beneath the arc. This can be accomplished by selecting the Selected zones only option and marking the material zones where the boundary condition is to be applied. | ||
:''Node Properties'' – As explained in the previous section, if an arc is marked as a specified head arc, a head value must be assigned to the two nodes at the endpoints of the arc. This is accomplished using the ''FEMWATER Node Attributes'' dialog. The Arc Properties dialog is accessed by selecting a node and then selecting the '''Attribute Table''' command in the coverage right-click option menu. If the head values assigned to the two endpoints of an arc are different, the head is assumed to vary linearly along the length of the arc. | :'''Node Properties''' – As explained in the previous section, if an arc is marked as a specified head arc, a head value must be assigned to the two nodes at the endpoints of the arc. This is accomplished using the ''FEMWATER Node Attributes'' dialog. The Arc Properties dialog is accessed by selecting a node and then selecting the '''Attribute Table''' command in the coverage right-click option menu. If the head values assigned to the two endpoints of an arc are different, the head is assumed to vary linearly along the length of the arc. | ||
:''Polygon Properties'' – Polygons in a FEMWATER coverage serve two purposes: they define the model domain and they can be used to assign recharge values on a zonal basis. When building a FEMWATER coverage, the boundary of the model domain should be delineated using arcs. In order to use the coverage to build a 3D mesh, the arcs should be used to build one or more polygons defining the model domain using the '''Build Polygon''' command. | :'''Polygon Properties''' – Polygons in a FEMWATER coverage serve two purposes: they define the model domain and they can be used to assign recharge values on a zonal basis. When building a FEMWATER coverage, the boundary of the model domain should be delineated using arcs. In order to use the coverage to build a 3D mesh, the arcs should be used to build one or more polygons defining the model domain using the '''Build Polygon''' command. | ||
:In addition to defining the model domain, a material ID and a recharge value can be assigned to polygons in the FEMWATER coverage using the ''Polygon Properties'' dialog. The polygon attributes are as follows: | :In addition to defining the model domain, a material ID and a recharge value can be assigned to polygons in the FEMWATER coverage using the ''Polygon Properties'' dialog. The polygon attributes are as follows: | ||
:''Material'' – The ''Material'' pull-down list can be used to associate a material with a polygon. When the [[GMS:Map to Modules#Map to 2D Mesh|'''Map → 2D Mesh''']] command is selected, all 2D elements within the polygon are assigned the specified material. This material can be used to define the material type for the 3D elements when the 2D elements are extruded using the '''Fill Between TINs → 3D Mesh''' command. | :'''Material''' – The ''Material'' pull-down list can be used to associate a material with a polygon. When the [[GMS:Map to Modules#Map to 2D Mesh|'''Map → 2D Mesh''']] command is selected, all 2D elements within the polygon are assigned the specified material. This material can be used to define the material type for the 3D elements when the 2D elements are extruded using the '''Fill Between TINs → 3D Mesh''' command. | ||
:'''Fluid Flux''' – The ''Fluid flux'' option is used to assign a specified flux to the polygon. The flux can be assigned using either the Specified flux or Variable flux options. These options are set in the ''Flow bc'' drop-down list. When the '''Map → FEMWATER''' command is selected, all element faces on the top of the 3D mesh inside the polygon are found and the specified flux is assigned to the element faces. | :'''Fluid Flux''' – The ''Fluid flux'' option is used to assign a specified flux to the polygon. The flux can be assigned using either the Specified flux or Variable flux options. These options are set in the ''Flow bc'' drop-down list. When the '''Map → FEMWATER''' command is selected, all element faces on the top of the 3D mesh inside the polygon are found and the specified flux is assigned to the element faces. | ||
