Groundwater level formula (Water Overlay): Difference between revisions
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Groundwater level is calculated per cell. | Groundwater level is calculated per cell. | ||
: <math>h_u = \frac{\Delta w_{sat}}{sp}</math> | : <math>h_u = \frac{\Delta w_{sat}}{sp}</math> | ||
: <math>l_u = h_u + | : <math>l_u = h_u + B - \Delta d</math> | ||
Where: | Where: | ||
| Line 8: | Line 8: | ||
* <math>\Delta w_{sat}</math> = 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. | * <math>\Delta w_{sat}</math> = 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. | ||
* <math> | * <math>B</math> = The [[terrain height (Water Overlay)|surface height]] in the cell, relative to {{datum}}. | ||
* <math>\Delta | * <math>\Delta d</math> = The [[Ground bottom distance m model attribute (Water Overlay)|GROUND_BOTTOM_DISTANCE_M]] (effectively available height in the underground model). | ||
* <math>sp</math> = The [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] of the underground terrain type, used here as a fraction. | * <math>sp</math> = The [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] of the underground terrain type, used here as a fraction. | ||
Revision as of 14:42, 10 July 2020
Groundwater level is calculated per cell.
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle h_u = \frac{\Delta w_{sat}}{sp}}
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle l_u = h_u + B - \Delta d}
Where:
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle l_u} = The groundwater level, relative to datum. Also known as the watertable.
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle h_u} = The height (column) of the saturated zone.
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \Delta w_{sat}} = 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.
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle B} = The surface height in the cell, relative to datum.
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \Delta d} = The GROUND_BOTTOM_DISTANCE_M (effectively available height in the underground model).
- Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle sp} = The WATER_STORAGE_PERCENTAGE of the underground terrain type, used here as a fraction.
Related
The following topics are related to this formula.
- Features
- Groundwater
- Formulas
- Underground flow formula
- Underground evaporation formula
- Surface infiltration formula
- Underground infiltration formula
- Models
- Surface model
- Evaporation model
- Infiltration model
Related models
