Water area (Water Overlay) and External area (Water Overlay): Difference between pages

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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.
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).
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.
{{Overlay attribute
{{Overlay attribute
|attribute=[[Water_level_(Water_Overlay)|WATER_LEVEL]]
|attribute=[[External_area_(Water_Overlay)|EXTERNAL_AREA]]
|unit={{mdatum}}
|unit=m²
|description=The water level for all water terrains in this water level area
|description=The surface area of the external water body behind the breach. The larger the external water body, the more water can flow from it (or into it), and the smaller the effect of the inflow or outflow of water on the external water level.
|defaultvalue=n/a
|defaultvalue=n/a
|icon=[[File:waterwizard_icon_water_level.png]]
|icon=[[File:waterwizard_icon_external_area.png]]
}}
}}
==Notes==
* When a [[Breach_input_area_(Water Overlay)|breach input area]] is defined, an external water body will not be created. Subsequently, the [[External_surface_level_(Water_Overlay)|EXTERNAL_SURFACE_LEVEL]], [[External_water_level_(Water_Overlay)|EXTERNAL_WATER_LEVEL]] and [[External_area_(Water_Overlay)|EXTERNAL_AREA]] attributes will be ignored.
==See also==
==See also==
* [[Inundation area (Water Overlay)|Inundation area]]
* [[Breach growth formula (Water Overlay)|Breach growth formula]]
* [[Surface model (Water Overlay)|Surface model]]
* [[Breach flow formula (Water Overlay)|Breach flow formula]]
* [[Surface water level formula (Water Overlay)|Surface water level formula]]
* [[Weir formula (Water Overlay)|Weir formula]]
{{WaterOverlay hydrological features nav}}


==Notes==
* 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.
* 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.
{{WaterOverlay hydrological features nav}}
{{Water Module buttons}}
{{Water Module buttons}}

Revision as of 14:19, 19 June 2019

Template:Overlay attribute

Notes

See also

Water Module
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Water Module
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Tutorials
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Overview
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Theory
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Benchmarks
Group
Water area
Water level • Water relative
Sewer area
Sewer storage • Sewer pump speed
Inundation area
Inundation level
Aquifer
Aquifer kd • Aquifer datum
Breach
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
Rain m
Limitation area
Limit area
Output
Object flow output • Object height output • Object datum output a • Object datum output b • Object width output
Related
Building attributes • Hydraulic structures •  Terrain attributes • Model attributes • Results • Simulation data


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Water Module
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Getting started button.png
Tutorials
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Overview button.png
Overview
Benchmarks button.png
Theory button.png
Theory
Benchmarks button.png
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Benchmarks
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