How to model drainage (Water Overlay)

When using the Water Overlay to calculate groundwater model (Water Overlay) situations, the presence of drainages can have a strong impact on the results. Currently, drainages are not an available hydraulic structure. Instead, the effects of drainages can be approximated using Aquifers, configured with a low resistance and set to the height of the drainages.

Editor → Current Situation (Ribbon tab) → Areas (Ribbon bar)

Note that these steps assume the Overlay Keys are set to the default Attributes.

How to manually create a drainage-approximating aquifer:

1. Add a new Area to the Project.
2. Draw the Area in the 3D World in the location where the drainages are.
3. Add an AQUIFER_KD Attribute to the Area with value 1000.
4. Add an AQUIFER_HEIGHT Attribute to the Area, with the height of the drainages relative to datum as value.