Ground water (Water Overlay)

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0. None: No infiltration, no groundwater flow, no underground evaporation.
1. Complete: Full groundwater simulation, including infiltration, flow, and evaporation
2. Infiltration only: Water can Infiltrate into the unsaturated zone only, but no further underground flow or underground evaporation is simulated. The unsaturated zone is simulated to have infinite capacity.


  • Groundwater Overlays have the underground model active by default. The other Water Overlay variants have the underground model set to infiltration only. This is a recommended setting, trading in an imperceptable amount of accuracy for a more performant calculation setup.
  • This setting does not affect water flowing in- and out of the sewer.


See also