Inundation area (Water Overlay): Difference between revisions
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An inundation area is an initial placement of a quantity of water. This differs from the [[Water | An inundation area is an initial placement of a quantity of water. This differs from the [[Water area (Water Overlay)|water area]]s in that an inundation level allows you to place water anywhere on the surface (but explicitly not on [[terrain water (Water Overlay)|water]]). | ||
Inundation areas can be used for simulations of situations where an area is already seriously flooded, or where an area of land which is set up to be used as a water buffer or emergency water retention has already filled up. | Inundation areas can be used for simulations of situations where an area is already seriously flooded, or where an area of land which is set up to be used as a water buffer or emergency water retention has already filled up. | ||
{{Overlay | |||
| | {{Overlay keys| | ||
{{:Inundation level (Water Overlay)}} | |||
}} | }} | ||
{{article end | |||
|notes= | |||
* If a grid cell is not covered by an inundation area or if the cell is marked as [[terrain water (Water Overlay)|water]], the grid cell will not be inundated by the inundation level area. | * If a grid cell is not covered by an inundation area or if the cell is marked as [[terrain water (Water Overlay)|water]], the grid cell will not be inundated by the inundation level area. | ||
* For terrain with a steep decline, using a single inundation area to define the inundation level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered inundation areas, or initializing the waterway dry, should be considered. | * For terrain with a steep decline, using a single inundation area to define the inundation level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered inundation areas, or initializing the waterway dry, should be considered. | ||
*{{overlapping features note|Inundation areas}} | |||
* [[Water | |seealso= | ||
* [[Surface model (Water Overlay) | * [[Water area (Water Overlay)]] | ||
* [[Surface water level formula (Water Overlay) | * [[Surface model (Water Overlay)]] | ||
* [[Surface water level formula (Water Overlay)]] | |||
}} | |||
{{WaterOverlay hydrological features nav}} | {{WaterOverlay hydrological features nav}} | ||
Latest revision as of 12:23, 9 June 2026
An inundation area is an initial placement of a quantity of water. This differs from the water areas in that an inundation level allows you to place water anywhere on the surface (but explicitly not on water).
Inundation areas can be used for simulations of situations where an area is already seriously flooded, or where an area of land which is set up to be used as a water buffer or emergency water retention has already filled up.
| Icon | Key | Unit | Range | Description | Default value |
|---|---|---|---|---|---|
 |
INUNDATION_LEVEL | m + datum | The height of the water on non-water surface terrains. | n/a |
Notes
- If a grid cell is not covered by an inundation area or if the cell is marked as water, the grid cell will not be inundated by the inundation level area.
- For terrain with a steep decline, using a single inundation area to define the inundation level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered inundation areas, or initializing the waterway dry, should be considered.
- Overlapping Inundation areas are not allowed. Should in any location two or more Inundation areas overlap, the values of one of them is used, and the values of the others are ignored.
See also
- Group
- Water area
- Breach height • Breach width • Breach angle • Breach coefficient • Breach speed • Breach input area • Breach level area • External surface level • External water level • External area
- Rain area
- Limit area
- Output