Mode (Water Overlay)

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

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Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Models

Surface • Ground • Rain • Evaporation • Infiltration • Elevation • Breach • Sewer • Storage • Tracer flow • Border • Order

Model formulas

Timestep • Season • Surface water level • Groundwater level

Flow formulas

Surface flow • Surface infiltration • Ground flow • Ground infiltration • Surface evaporation • Ground evaporation • Ground bottom flow

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