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Ground Absorption Tab

Default Ground Absorption G

When calculating the ground absorption the global ground absorption for areas not covered by the object "Ground Absorption" (see Ground Absorption Areas) can be defined here (0 <= G <= 1). By default, a value of G=1 is assumed (porous soil).

Use map of ground absorption

It can be selected whether the map of ground absorption shall be used or not. This option is useful when having numerous areas of ground absorption in the project. In this case, the map of ground absorption accelerates the calculation because this map is used instead of the list of areas. The following options are available:

  • No: The existing areas of ground absorption are used within the calculation.
  • Yes: The map of ground absorption is used in any case.
  • Automatic (Default): Provided that all ground absorption areas in the project have more than 100 polygon points the map of ground absorption is generated and used. Otherwise the areas of ground absorption are used.
  • Resolution (m): resolution of the ground absorption grid (default value: 1 m)

Roads/Parking Lots are reflecting (G==0)

With this option activated, the road region (plus additional width from self-screening) and the area of parking lots will be considered as globally reflecting in the calculation. Whether this setting has any effect depends on the selected calculation standard or guideline.

Buildings are reflecting (G==0)

With this option activated, the base area of buildings will be considered as globally reflecting in the calculation. Whether this setting has any effect depends on the selected calculation standard or guideline.

Railways are absorbing (G==1)

With this option activated, the railway region (plus additional width from self-screening) will be considered as globally absorbing in the calculation. Whether this setting has any effect depends on the selected calculation standard or guideline.