GMS:MODFLOW Source/Sink Dialog: Difference between revisions
From XMS Wiki
Jump to navigationJump to search
No edit summary |
No edit summary |
||
| Line 3: | Line 3: | ||
==Point Sources/Sinks== | ==Point Sources/Sinks== | ||
The MODFLOW stresses can be categorized as point sources/sinks and areal sources/sinks. The point sources/sinks include rivers, wells, drains, and general head. Point sources/sinks are not assigned using arrays. Rather, they are associated with individual cells. Two methods are used to define point source/sink data. The simplest method is to define them as part of a MODFLOW conceptual model defined in the Map module. Another method is to assign them by selecting a set of cells and using the Sources/Sinks command. | The MODFLOW stresses can be categorized as point sources/sinks and areal sources/sinks. The point sources/sinks include rivers, wells, drains, and general head. Point sources/sinks are not assigned using arrays. Rather, they are associated with individual cells. Two methods are used to define point source/sink data. The simplest method is to define them as part of a MODFLOW conceptual model defined in the Map module. Another method is to assign them by selecting a set of cells and using the '''Sources/Sinks''' command. | ||
The '''Sources/Sinks''' command is used to both assign and edit river, drain, general head, and well type sources/sinks. Before selecting the '''Cell Sources/Sinks''' command, a set of cells should be selected using the cell selection tools. Once the command is selected, the Point Sources/Sinks dialog appears. | The '''Sources/Sinks''' command is used to both assign and edit river, drain, general head, and well type sources/sinks. Before selecting the '''Cell Sources/Sinks''' command, a set of cells should be selected using the cell selection tools. Once the command is selected, the Point Sources/Sinks dialog appears. | ||
====Creating New Sources/Sinks==== | ====Creating New Sources/Sinks==== | ||
A new instance of a source/sink of a particular type is created by selecting the Add button for the type. This creates a new source/sink and displays a default value or set of values for the source/sink in the edit fields on the right side of the dialog. If the simulation is steady state, normal edit fields are used to enter the values. If the simulation is transient, buttons appear which can be used to bring up the XY Series Editor. A value is entered for each of the defined stress periods. | A new instance of a source/sink of a particular type is created by selecting the '''Add''' button for the type. This creates a new source/sink and displays a default value or set of values for the source/sink in the edit fields on the right side of the dialog. If the simulation is steady state, normal edit fields are used to enter the values. If the simulation is transient, buttons appear which can be used to bring up the XY Series Editor. A value is entered for each of the defined stress periods. | ||
Multiple instances of a source/sink can be created by repeatedly selecting the Add button. Each cell can contain multiple sources/sinks of a particular type or a mixture of several types. | Multiple instances of a source/sink can be created by repeatedly selecting the '''Add''' button. Each cell can contain multiple sources/sinks of a particular type or a mixture of several types. | ||
====Editing Sources/Sinks==== | ====Editing Sources/Sinks==== | ||
| Line 16: | Line 16: | ||
====Deleting Sources/Sinks==== | ====Deleting Sources/Sinks==== | ||
An instance of a source/sink may be deleted by selecting the source sink from the list and selecting the Delete button. | An instance of a source/sink may be deleted by selecting the source sink from the list and selecting the '''Delete''' button. | ||
====Constant Values==== | ====Constant Values==== | ||
| Line 38: | Line 38: | ||
For example, suppose the Evapotranspiration package has been activated and each vertical column was assigned a unique value of elevation, extinction depth, and maximum evapotranspiration rate. Suppose that it becomes necessary to change the extinction depth of a large subset of the vertical columns to a constant value while leaving the other parameters unchanged. The ''Areal Sources/Sinks'' dialog has been designed so that it can be used to change one of the parameters without altering the other parameters. | For example, suppose the Evapotranspiration package has been activated and each vertical column was assigned a unique value of elevation, extinction depth, and maximum evapotranspiration rate. Suppose that it becomes necessary to change the extinction depth of a large subset of the vertical columns to a constant value while leaving the other parameters unchanged. The ''Areal Sources/Sinks'' dialog has been designed so that it can be used to change one of the parameters without altering the other parameters. | ||
If more than one cell is selected when the ''Areal Sources/Sinks'' dialog is brought up, the available edit fields appear with a checkerboard pattern if the values in the cells are not all identical. Before editing a parameter, click on the field to switch it from multi-select mode to normal mode. When the OK button is selected after the parameters have been edited, only the parameters that have been selected are changed. For example, in the case of changing the extinction depth, if the extinction depth is edited, the extinction depth of all of the vertical columns associated with the selected cells is changed to the new value but the individual values of elevation and maximum evapotranspiration rate are left unchanged. | If more than one cell is selected when the ''Areal Sources/Sinks'' dialog is brought up, the available edit fields appear with a checkerboard pattern if the values in the cells are not all identical. Before editing a parameter, click on the field to switch it from multi-select mode to normal mode. When the '''OK''' button is selected after the parameters have been edited, only the parameters that have been selected are changed. For example, in the case of changing the extinction depth, if the extinction depth is edited, the extinction depth of all of the vertical columns associated with the selected cells is changed to the new value but the individual values of elevation and maximum evapotranspiration rate are left unchanged. | ||
==See also== | ==See also== | ||
