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

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Pumps are constructions which can move water against its natural flow. Specifically, a pump with a positive pump speed will pump water from the entry point with a lower [[water level (Water Overlay)|water level]] to the entry point with a higher [[water level (Water Overlay)|water level]]. If no (differing) water levels are defined, the [[terrain height (Water Overlay)|surface height]] is used instead.
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.


The pump's direction does not change during the simulation.
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).


[[File:waterwizard_icon_pump_q.png]] A pump is a [[Line-based_construction_(Water_Overlay)|line-based construction]].
If the [[Underground model (Water Overlay)|underground model]] is active, and no [[Groundwater GeoTiff (Water Overlay)|groundwater GeoTiff]] is present, the watertable is initialized at the height defined by the water level area.
{{Overlay attribute
{{Overlay attribute
|attribute=[[Pump_q_(Water_Overlay)|PUMP_Q]]
|attribute=[[Water_level_(Water_Overlay)|WATER_LEVEL]]
|unit=m3/s
|unit={{mdatum}}
|description=The speed at which water is pumped from the lower end-point to the higher end-point.
|description=The water level for all water terrains in this water level area
|defaultvalue=n/a
|defaultvalue=n/a
|icon=[[File:waterwizard_icon_pump_q.png]]
|icon=[[File:waterwizard_icon_water_level.png]]
|attribute2=[[Lower_threshold_pump_(Water_Overlay)|LOWER_THRESHOLD]]
|unit2=m
|description2=The threshold of the lower end-point of the Pump. Water flows from the lower end-point to the higher end-point until the water level at the lower end-point has reached the threshold. If not selected, the Lower Threshold will be ignored as a mechanic.
|defaultvalue2={{novalue}}
|icon2=[[File:waterwizard_icon_lower_threshold.png]]
|attribute3=[[Upper_threshold_pump_(Water_Overlay)|UPPER_THRESHOLD]]
|unit3=m
|description3=The threshold of the higher end-point of the Pump. Water flows from the lower end-point to the higher end-point until the water level at the higher end-point has reached the threshold. If not selected, the Upper Threshold will be ignored as a mechanic.
|defaultvalue3={{novalue}}
|icon3=[[File:waterwizard_icon_upper_threshold.png]]
|attribute4=[[Inlet_capacity_(Water_Overlay)|INLET_CAPACITY]]
|unit4=m3/s
|description4=The maximum possible m3 water that can flow through this construction. Water flowing back in the other direction replenishes the capacity.
|defaultvalue4=n/a
|icon4=[[File:waterwizard_icon_inlet_capacity.png]]
}}
}}
==Notes==
* A negative value for the [[Pump q (Water Overlay)|PUMP_Q]] attribute is also allowed, in which case water can be pumped in the reverse direction. Sometimes referred to as ''draining''.
==See also==
==See also==
* [[Pump formula (Water Overlay)|Pump formula]]
* [[Inundation area (Water Overlay)]]


{{WaterOverlay hydraulic structure nav}}
==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 contain water.
* 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.
{{WaterOverlay hydrological features nav}}
{{Water Module buttons}}
{{Water Module buttons}}

Revision as of 13:20, 19 June 2019

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 watertable is initialized at the height defined by the water level area. Template:Overlay attribute

See also

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 contain water.
  • 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.