GMS:Map to MODFLOW with TINs: Difference between revisions
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At times, instead of assigning values at the upstream and downstream ends of the arc, it is useful to assign a property using a surface. This can be done in GMS using a TIN. | At times, instead of assigning values at the upstream and downstream ends of the arc, it is useful to assign a property using a surface. This can be done in GMS using a TIN. | ||
[[Image:TinModflow1.png|400px|TIN assigned to river stage.]] | :[[Image:TinModflow1.png|400px|TIN assigned to river stage.]] | ||
When the arc is [[GMS:Temporal Discretization|discretized]] onto the model grid, the cells that intersect the arc are found. Then the boundary condition property is interpolated from the TIN to the cell centers. | When the arc is [[GMS:Temporal Discretization|discretized]] onto the model grid, the cells that intersect the arc are found. Then the boundary condition property is interpolated from the TIN to the cell centers. | ||
[[Image:TinModflow2.png|400px|TIN assigned to river stage.]] | :[[Image:TinModflow2.png|400px|TIN assigned to river stage.]] | ||
Beginning with version 9.1, it is also possible to assign TINs with transient datasets. This gives the option to have a surface that changes with time assigned to a boundary condition property. The times associated with the TIN dataset can be in date/time format or relative time format. | Beginning with version 9.1, it is also possible to assign TINs with transient datasets. This gives the option to have a surface that changes with time assigned to a boundary condition property. The times associated with the TIN dataset can be in date/time format or relative time format. | ||
<gallery widths="320px" heights="256px"> | |||
Image:TinModflow3.png | |||
Image:TinModflow4.png | |||
Image:TinModflow5.png | |||
</gallery> | |||
[[Image:TinModflow6.png|600px|Transient TIN assigned to river stage.]] | :[[Image:TinModflow6.png|600px|Transient TIN assigned to river stage.]] | ||
There is a user preference for treating the transient data on the TIN as a step function or as a continuous curve. This option is selected when performing the '''Map→MODFLOW''' operation under the ''Transient TIN datasets'' section. | There is a user preference for treating the transient data on the TIN as a step function or as a continuous curve. This option is selected when performing the '''Map→MODFLOW''' operation under the ''Transient TIN datasets'' section. | ||
[[Image:TinModflow7.png|User preference for transient TIN datasets.]] | :[[Image:TinModflow7.png|User preference for transient TIN datasets.]] | ||
