Groundwater level formula (Water Overlay): Difference between revisions

Revision as of 12:58, 25 January 2024

Groundwater level is calculated per cell.

h_{s}={\frac {V_{s}}{f_{s}}}

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_{s}

= The WATER_STORAGE_PERCENTAGE of the underground 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.

@@ Line 1: / Line 1: @@
 Groundwater level is calculated per cell.
 : <math>h_s = \frac{V_s}{f_s}</math>
-: <math>w_g = h_s + B_c - d_b</math>
+: <math>w_g = h_s + B_c - d_{b,c}</math>
 Where:
@@ Line 9: / Line 9: @@
 : <math>w_g</math> = The groundwater level, relative to {{datum}}. Also known as the watertable.
 : <math>B_c</math> = the datum height of the surface of cell c, set by the [[Elevation (Water Overlay)|elevation]] or a [[Terrain elevation prequel (Water Overlay)|Terrain elevation prequel]].
-: <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>d_{b,c}</math> = The ground bottom distance of the cell c, defined by a [[Bottom distance prequel (Water Overlay)|Bottom distance prequel]] or a general [[Ground_bottom_distance_m_(Water_Overlay)|GROUND_BOTTOM_DISTANCE_M]] of the Water Overlay.
 {{article end