# GMS:HydroGeoSphere Polygon Properties

HydroGeoSphere | |
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Models & Tools | |

HGS Simulation Control HGS Materials HGS Coverages HGS Arc Properties HGS Point Properties HGS Polygon Properties HGS Renumber UGrid | |

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.

## 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.

## Related Topics

GMS – Groundwater Modeling System | ||
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Modules: | 2D Grid • 2D Mesh • 2D Scatter Point • 3D Grid • 3D Mesh • 3D Scatter Point • Boreholes • GIS • Map • Solid • TINs • UGrids | |

Models: | FEFLOW • FEMWATER • HydroGeoSphere • MODAEM • MODFLOW • MODPATH • mod-PATH3DU • MT3DMS • MT3D-USGS • PEST • PHT3D • RT3D • SEAM3D • SEAWAT • SEEP2D • T-PROGS • ZONEBUDGET | |

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