Groundwater level formula (Water Overlay)
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Groundwater level is calculated per cell.
- $ h_{s}={\frac {V_{s}}{f_{ws}}} $
- $ w_{g}=h_{s}+B_{c}-d_{b,c} $
Where:
- $ h_{s} $ = The height (column) of the saturated zone.
- $ V_{s} $ = The amount of water in the saturated zone. The height of the water column if the equivalent amount of water was placed on the surface.
- $ f_{ws} $ = The WATER_STORAGE_PERCENTAGE of the ground terrain type, used here as a fraction.
- $ w_{g} $ = The groundwater level, relative to datum. Also known as the watertable.
- $ B_{c} $ = the datum height of the surface of cell c, set by the elevation or a Terrain elevation prequel.
- $ d_{b,c} $ = The ground bottom distance of the cell c, defined by a Bottom distance prequel or a general GROUND_BOTTOM_DISTANCE_M of the Water Overlay.
Related
The following topics are related to this formula.
- Features
- Groundwater Prequel (Water Overlay)
- Formulas
- Ground flow formula (Water Overlay)
- Ground evaporation formula (Water Overlay)
- Surface infiltration formula (Water Overlay)
- Ground infiltration formula (Water Overlay)
- Ground bottom flow formula (Water Overlay)
- Models
- Surface model (Water Overlay)
- Ground model (Water Overlay)
- Evaporation model (Water Overlay)
- Infiltration model (Water Overlay)
- 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
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