GMS:HydroGeoSphere Polygon Properties

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The Polygon Properties dialog in the HydroGeoSphere model is where a polygon or polygons can be assigned a boundary condition. There are four options for the polygon properties, which are listed on the left side of the dialog: head, flux, rain, and potential evapotranspiration. The input parameters are shown on the right when one of the four boundary conditions is selected. Only one type of boundary condition can be assigned to a feature object on a boundary conditions coverage.

Polygons are mapped to the points (nodes in HGS lingo) or faces inside the polygon, but not on the polygon boundary. For faces, polygons map to UGrid top faces, not vertical faces.

  • Head – node
  • Flux – face
  • Rain – face
  • Potential evapotranspiration – face
Polygon Properties dialog for the boundary conditions coverage

Head or Flux

Head and flux are two separate available arc property types on a boundary conditions coverage, but the input options available are the same. Head is a general specified head boundary condition, and flux is a general specified flux boundary condition. The input options for head and flux are listed below.

  • Name – The name of the boundary condition. Names should be unique and contain no white space.
  • Domain – The domain in which the boundary conditions are applied.
    • Porous media
      • Minimum sheet – The minimum node sheet; boundary conditions are applied between the minimum and maximum node sheets.
      • Maximum sheet – The maximum node sheet; boundary conditions are applied between the minimum and maximum node sheets.
      • Input type – How the boundary condition data is specified.
        • Constant – Constant value of the boundary condition.
        • Time series – Time-varying values of the boundary condition. A table is generated using the XY Series Editor dialog that is opened by clicking the Edit XY Series button by either manually entering the data, or importing the data.
          • Interpolate
        • Time rasters – The Edit Table... button opens the Time raster table dialog where the data is entered by selecting a raster from outside GMS.
          • Interpolate – Causes time-varying values to be interpolated, resulting in a smoother application of the time-varying function.
    • Surface flow
      • Input type – How the boundary condition data is specified.
        • Constant – Constant value of the boundary condition.
        • Time series – Time-varying values of the boundary condition. A table is generated using the XY Series Editor dialog that is opened by clicking the Edit XY Series button by either manually entering the data, or importing the data.
          • Interpolate – Causes time-varying values to be interpolated, resulting in a smoother application of the time-varying function.
        • Time rasters – The Edit Table... opens the Time raster table dialog where the data is entered by selecting a raster from outside GMS.
          • Interpolate – Causes time-varying values to be interpolated, resulting in a smoother application of the time-varying function.

Rain or Potential Evapotranspiration

Rain is a general specified flux boundary condition that converts fluxes to nodal volumetric fluxes. Potential evapotranspiration is a specified flux which is used in conjunction with evapotranspiration properties and is applied as a second-type boundary condition. Rain and potential evapotranspiration are two different polygon boundary condition options, but they contain the same input parameter options, which are listed below.

  • Name – The name of the boundary condition. Names should be unique and contain no white space.
  • Input type – How the boundary condition data is specified.
    • Constant – Constant value of the boundary condition.
    • Time series – Time-varying values of the boundary condition. A table is generated using the XY Series Editor dialog that is opened by clicking the Edit XY Series button by either manually entering the data, or importing the data.
      • Interpolate – Causes time-varying values to be interpolated, resulting in a smoother application of the time-varying function.
    • Time raster table – The Edit Table... opens the Time raster table dialog where the data is entered by selecting a raster from outside GMS.
      • Interpolate – Causes time-varying values to be interpolated, resulting in a smoother application of the time-varying function.

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