Water area (Water Overlay): Difference between revisions
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* A water level area represents real-world water level areas. | * A water level area represents real-world water level areas. | ||
* Grid cells are marked as water by an overlapping [[terrain water (Water Overlay)|water terrain]]. If a grid cell is marked as water, but is not covered by a water level area, the grid cell will not be initialized with water from water level areas. | * Grid cells are marked as water by an overlapping [[terrain water (Water Overlay)|water terrain]]. If a grid cell is marked as water, but is not covered by a water level area, the grid cell will not be initialized with water from water level areas. | ||
* For waterways with a steep decline, using a single water level area to define the water level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered water level areas, [[Inundation area (Water Overlay)|inundation area]]s, or initializing the waterway dry, should be considered. | * For waterways with a steep decline, using a single water level area to define the water level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered water level areas, [[Inundation area (Water Overlay)|inundation area]]s, or initializing the waterway dry, should be considered. | ||
|seealso= | |||
* [[Inundation area (Water Overlay)]] | * [[Inundation area (Water Overlay)]] | ||
* [[Surface model (Water Overlay)]] | * [[Surface model (Water Overlay)]] | ||
* [[Surface water level formula (Water Overlay)]] | * [[Surface water level formula (Water Overlay)]] | ||
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{{WaterOverlay hydrological features nav}} | {{WaterOverlay hydrological features nav}} | ||
Revision as of 12:12, 2 October 2020
A Water level area is a means to specify the initial water level for large sections of your project area. This initial water level is only applied to water terrains. The datum height of the water level is assumed to be equal within the water level area.
If no water level areas are present, no water is initialized in the water terrains. Waterways and other water bodies will be dry at the start of the simulation (unless an inundation area is present, which performs a similar function).
If the underground model is active, and no groundwater GeoTiff is present, the underground watertable is initialized at the height defined by the water level area.
| Icon | Key | Unit | Range | Description | Default value |
|---|---|---|---|---|---|
 |
WATER_LEVEL | m + datum or m above datum | The water level for all water terrains in this water area. | n/a |
Notes
- A water level area represents real-world water level areas.
- Grid cells are marked as water by an overlapping water terrain. If a grid cell is marked as water, but is not covered by a water level area, the grid cell will not be initialized with water from water level areas.
- For waterways with a steep decline, using a single water level area to define the water level might not suffice, since the level is a datum height, not a relative offset from the bottom. Alternatives, such as staggered water level areas, inundation areas, or initializing the waterway dry, should be considered.
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