GMS:CHD Package: Difference between revisions
From XMS Wiki
Jump to navigationJump to search
(Defined CHD initialism, clarified how it works for the constant head cells, and corrected spelling of 'variant') |
(→Reset) |
||
(2 intermediate revisions by the same user not shown) | |||
Line 12: | Line 12: | ||
===Defining Time Variant Specified Head Boundaries=== | ===Defining Time Variant Specified Head Boundaries=== | ||
A time variant specified head boundary can be defined using a [[GMS:MODFLOW Conceptual Model Approach|conceptual model]] in the [[GMS:Map Module|Map module]] simply by using the Transient option when entering the head value in the ''Attributes'' dialog. When the specified head attribute is assigned to a polygon, the head is assigned uniformly over the entire polygon. When assigned to an arc, separate head values are applied to each of the nodes on the ends of the arc and the head is assumed to vary linearly between the nodes. When the attribute is assigned to a point, the head is assigned directly to the cell containing the point. For cell-by-cell editing, a selected set of cells can be designated as time variant specified head cells using the [[GMS:MODFLOW#Building a MODFLOW Model|'''Point Sources/Sinks''']] command described above. When the head vs. time values are entered using the [[XY Series Editor|''XY Series Editor'']], two values (beginning and ending values) must be entered per stress period. Once a set of cells has been specified, the ''Time Variant Specified Head Package'' dialog can be used to view and edit the values assigned to the cells. | A time variant specified head boundary can be defined using a [[GMS:MODFLOW Conceptual Model Approach|conceptual model]] in the [[GMS:Map Module|Map module]] simply by using the ''Transient'' option when entering the head value in the ''Attributes'' dialog. When the specified head attribute is assigned to a polygon, the head is assigned uniformly over the entire polygon. When assigned to an arc, separate head values are applied to each of the nodes on the ends of the arc and the head is assumed to vary linearly between the nodes. When the attribute is assigned to a point, the head is assigned directly to the cell containing the point. For cell-by-cell editing, a selected set of cells can be designated as time variant specified head cells using the [[GMS:MODFLOW#Building a MODFLOW Model|'''Point Sources/Sinks''']] command described above. When the head vs. time values are entered using the [[XY Series Editor|''XY Series Editor'']], two values (beginning and ending values) must be entered per stress period. Once a set of cells has been specified, the ''Time Variant Specified Head Package'' dialog can be used to view and edit the values assigned to the cells. | ||
===Stress Period=== | ===Stress Period=== | ||
Line 26: | Line 26: | ||
For cells where CHD type boundary conditions have been assigned, the starting and ending heads assigned to each cell are displayed in the spreadsheet portion at the lower part of the dialog. The spreadsheet can be used to edit the row, column, layer, starting head, and ending head values. For a transient simulation, the values displayed in the spreadsheet are for an individual stress period. The values associated with other stress periods can be edited by entering the number of the desired stress period in the ''stress period'' edit box in the center of the dialog. If the ''Use previous ''option is selected for a given stress period, the values from the previous stress period are used and the spreadsheet is dimmed. | For cells where CHD type boundary conditions have been assigned, the starting and ending heads assigned to each cell are displayed in the spreadsheet portion at the lower part of the dialog. The spreadsheet can be used to edit the row, column, layer, starting head, and ending head values. For a transient simulation, the values displayed in the spreadsheet are for an individual stress period. The values associated with other stress periods can be edited by entering the number of the desired stress period in the ''stress period'' edit box in the center of the dialog. If the ''Use previous ''option is selected for a given stress period, the values from the previous stress period are used and the spreadsheet is dimmed. | ||
=== | ===Delete All=== | ||
This button | This button deletes all values in the dialog. | ||
{{Navbox GMS}} | {{Navbox GMS}} | ||
Line 33: | Line 33: | ||
[[Category:MODFLOW Packages]] | [[Category:MODFLOW Packages]] | ||
[[Category:MODFLOW Dialogs]] | [[Category:MODFLOW Dialogs]] | ||
[[Category:MODFLOW-USG]] |