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| 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 [[terrain water (Water Overlay)|water terrain]]s. The datum height of the water level is assumed to be equal within the water level area.
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| 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 (Water Overlay)|inundation area]] is present, which performs a similar function).
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| If the [[Underground model (Water Overlay)|underground model]] is active, and no [[Groundwater GeoTiff (Water Overlay)|groundwater GeoTiff]] is present, the underground watertable is initialized at the height defined by the water level area.
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| {{Overlay attribute | | {{Overlay attribute |
| |attribute=[[Water_level_(Water_Overlay)|WATER_LEVEL]] | | |attribute=[[Inundation_level_(Water_Overlay)|INUNDATION_LEVEL]] |
| |unit={{mdatum}} | | |unit={{mdatum}} |
| |description=The water level for all water terrains in this water level area | | |description=The height of the water on non-water surface terrains. |
| |defaultvalue=n/a | | |defaultvalue=n/a |
| |icon=[[File:waterwizard_icon_water_level.png]] | | |icon=[[File:waterwizard_icon_inundation_level.png]] |
| }} | | }} |
| ==See also== | | ==See also== |
| * [[Inundation area (Water Overlay)|Inundation area]]
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| * [[Surface model (Water Overlay)|Surface model]]
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| * [[Surface water level formula (Water Overlay)|Surface water level formula]] | | * [[Surface water level formula (Water Overlay)|Surface water level formula]] |
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| ==Notes==
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| * A water level area represents real-world water level areas.
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| * 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.
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| * 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.
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| {{WaterOverlay hydrological features nav}} | | {{WaterOverlay hydrological features nav}} |
| {{Water Module buttons}} | | {{Water Module buttons}} |
