Mode (Water Overlay): Difference between revisions

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The mode of the [[Water Overlay]] affects the accuracy for some parts of the simulation. The setting is available to reduce the frequency of certain calculations, providing faster simulations.
The mode of the [[Water Overlay]] affects the taken time steps, and with it the evaluation frequency, for ground water and hydraulic structures of the simulation.  


Surface water simulation time steps are only depended on this mode when [[Surface_water_(Water_Overlay)|surface water]] mode is set to the '''Avg Waterway''' or '''Avg Terrain'''.
It does not influence the evaluation frequency of the surface water simulation when [[Surface_water_(Water_Overlay)|surface water]] is set to the '''Shallow''' or '''Hybrid''' mode.
===Modes===
There are three modes available:
There are three modes available:


* Speed: Lowest frequencies, fastest calculations
* Speed: Lowest frequencies, fastest calculations. Mode factor 3.
* Normal: Average mode between Speed an Accuracy.
* Normal: Average mode between Speed an Accuracy. Mode factor 2.  
* Accuracy: Highest frequencies, greatest detail in water movements.
* Accuracy: Highest frequencies, greatest detail in water movements. Mode factor 1.


The mode has the following effects:
===Timesteps===
The cell size is defined by dx. The timesteps are in seconds.


{| {{STDT|overlay sortable}}
The mode has the following effects on timesteps:
|-
* Horizontal groundwater timestep = min ( 5 * dx * modeFactor , 120 )
!  !! Average !! Speed !! Speed !! Description
* Vertical groundwater timestep is based on whether shallow water simulation is selected.
|-
** Shallow water active: 2 * modeFactor.
||Sewer inflow speed || Once per 2 seconds || Once per 4 seconds || Once per 6 seconds || How often water flows from the surface into a sewer via a sewered Construction
** Shallow water not active: Horizontal groundwater timestep
|-
* Structures and features:
|| ... || ... || ... || ... || ...
** Average areas mode: 0.5 * Vertical groundwater timestep
|}
** No average areas: 1.0 * Vertical groundwater timestep


{{WaterOverlay formula nav}}
{{WaterOverlay formula nav}}

Latest revision as of 09:59, 11 February 2022

This article is a stub.

The mode of the Water Overlay affects the taken time steps, and with it the evaluation frequency, for ground water and hydraulic structures of the simulation.

Surface water simulation time steps are only depended on this mode when surface water mode is set to the Avg Waterway or Avg Terrain.

It does not influence the evaluation frequency of the surface water simulation when surface water is set to the Shallow or Hybrid mode.

Modes

There are three modes available:

  • Speed: Lowest frequencies, fastest calculations. Mode factor 3.
  • Normal: Average mode between Speed an Accuracy. Mode factor 2.
  • Accuracy: Highest frequencies, greatest detail in water movements. Mode factor 1.

Timesteps

The cell size is defined by dx. The timesteps are in seconds.

The mode has the following effects on timesteps:

  • Horizontal groundwater timestep = min ( 5 * dx * modeFactor , 120 )
  • Vertical groundwater timestep is based on whether shallow water simulation is selected.
    • Shallow water active: 2 * modeFactor.
    • Shallow water not active: Horizontal groundwater timestep
  • Structures and features:
    • Average areas mode: 0.5 * Vertical groundwater timestep
    • No average areas: 1.0 * Vertical groundwater timestep
Water Module
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Water Module
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Benchmarks
Models
Surface • Ground • Rain • Evaporation • Infiltration • Elevation • Breach • Sewer • Storage • Tracer flow • Border • Order
Model formulas
Timestep • Season • Surface water level • Groundwater level
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Hydraulic structure formulas
Culvert • Weir • Breach growth • Breach flow • Pump • Sewer Overflow • Inlet • Drainage
Related
Building attributes • Hydrological features • Hydraulic structures •  Terrain attributes • Model attributes • Results • Simulation data
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