Groundwater level formula (Water Overlay): Difference between revisions

Revision as of 14:44, 10 July 2020

Groundwater level is calculated per cell.

h_{u}={\frac {\Delta w_{s}}{sp}}

l_{u}=h_{u}+B-d_{b}

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 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_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.
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.
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 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 d_b} = The GROUND_BOTTOM_DISTANCE_M (effectively available height in the underground model).

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@@ Line 1: / Line 1: @@
 Groundwater level is calculated per cell.
-: <math>h_u = \frac{\Delta w_{sat}}{sp}</math>
+: <math>h_u = \frac{\Delta w_s}{sp}</math>
 : <math>l_u = h_u + B - d_b</math>
 Where:
+* <math>h_u</math> = The height (column) of the saturated zone.
+* <math>\Delta w_s</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>sp</math> = The [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]] of the underground terrain type, used here as a fraction.
 * <math>l_u</math> = The groundwater level, relative to {{datum}}. Also known as the watertable.
-* <math>h_u</math> = The height (column) of the saturated zone.
-* <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>B</math> = The [[terrain height (Water Overlay)|surface height]] in the cell, relative to {{datum}}.
 * <math>d_b</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.
 ==Related==