Mode (Water Overlay): Difference between revisions

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m (Rudolf@tygron.nl moved page Calculation preference formula (Water Overlay) to Mode (Water Overlay) over redirect: Not a formula, but does affect calculation)
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This configuration option is no longer used.
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===Timesteps===
This settings influence the timesteps for rain, surfaceflow and groundwater in the calculation model.
All settings result in stable solution, however small fluctuations can occur in the hydro-graphs.
By default Speed is selected, only change this when your use-case demands it.


* Speed: Larger timesteps (default).
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.
 
There are three modes available:
 
* Speed: Lowest frequencies, fastest calculations
* Normal: Average mode between Speed an Accuracy.
* Normal: Average mode between Speed an Accuracy.
* Accuracy: Smallest timesteps, smoothest hydro-graphs.
* Accuracy: Highest frequencies, greatest detail in water movements.
 
===Low Impulse Mode===
By default the model uses full impulse to simulate waterflow. However when using long term average calculations (e.g. groundwater year round) the (short term) impulse has a very limited effect on the outcome. In this case select the Low Impulse Mode option which reduces gravity in your simulation and thus the impulse. This means that peak velocity in heavy rain-showers or floodings are not accurate, but the average waterflow through the system remains the same.


The low impulse mode will reduce the used [[gravity (Water Overlay)|gravitational constant]] to 0,5.
The mode has the following effects:


Warning: Do not use this option with floodings or heavy rain-shower stress calculations.
{| {{STDT|overlay sortable}}
-->
|-
!  !! Average !! Speed !! Speed !! Description
|-
||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
|-
|| ... || ... || ... || ... || ...
|}


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

Revision as of 12:33, 11 May 2021

This article is a stub.

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.

There are three modes available:

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

The mode has the following effects:

Average Speed Speed Description
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
... ... ... ... ...
Water Module
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