Order of calculations (Water Overlay)

During the calculation, multiple facets have to be calculated. In each timestep, each aspect of the calculation has to be performed. Although as timesteps become smaller, the exact order of operation becomes less important, the order of operations can lead to specific behavioral details in some uncommon situations.

Calculations are performed in the following order:

• Horizontal surface flow and horizontal ground flow
• Rain
• Building storage
• Sewer inflow
• Surface evaporation
• Groundwater evaporation (unsaturated zone)
• Groundwater evaporation (saturated zone)
• Ground infiltration
• Surface infiltration
• Ground bottom flow
• Exfiltration
• Hydrological constructions (culverts, weirs, pumps, in- and outlets)
• Hydrological areas (sewer overflow, breach in- and outflow)
• Tracer movement, based on the water flow and infiltration which has occurred

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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