The groundwater object allows you to model Salinity with a layered approach (Layered Salt) when the groundwater object is using the Head Based Groundwater Grid method in the Solution Type category.

Following is a brief description of the groundwater solution equations when using a head based solution. Flows to/from the groundwater object are either input, provided across a link or computed. When computed based on head, the computation uses previous timestep information. Following is the mass balance equation for connected groundwater objects.

(see “solveGWMB_givenPreviousElevations” in Objects and Methods) illustrates the existing groundwater object, including all of these mass balance components and typical links that are created.