Drainage (Water Overlay)

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Drainages provide connections between the saturated ground layer and nearby waterways, draining groundwater to levels which are optimal for agriculture. Drainage can be passive, where water drains based on water head differences, or active, where the water is pumped from the drain to the nearby waterway.

Waterwizard icon drainage.png A drainage is an area-based building.

Drainage diameter (Water Overlay)

Notes

  • A drainage should have a part that overlaps with land and a part that overlaps with water. These should be two separate polygons. Neither polygon should overlap with the edge of the waterway.

There are three use cases that can be modeled using a drainage:

Passive Drainage

A passive drainage lets water flow from the drainage pipes into the waterway. I should therefor always have a positive Q.

Passive drainage positive.jpg

Active Drainage Negative Q

A active drainage with a negative Q can pump water from from the waterway (with a lower level) up into the drainage pipes.

The pump will keep pumping until:

Active drainage negative.jpg

Active Drainage Positive Q

A active drainage with a positive Q can pump water from the drainage pipes up into a waterway (with a higher level).

The pump will keep pumping until:

Active drainage positive.jpg

How-to's

See also