Model Build elements

This section describes each of the model elements that can be added to a model and together define the flow field within the model. The Model Build menu lists each of the element types under sub-sections, and clicking on an element type brings up a data table containing all instances of that element within the model.

The following sections describe how each element works and what parameters are required.

Page	What it covers
Domains	Confined, unconfined, and fresh/salt interface domains
Pumping wells	Discharge-specified, multi-domain, and head-specified wells
Line boundaries	Head-specified, normal flux-specified, head-dependent normal flux (3rd type), discharge-specified, river, drain/fracture, leaky barrier, inter-domain, and head-specified external with gradient
Area source/sink	Uniform, Domain; Spatially Variable, Domain; Spatially Variable, Polygon; Spatially Variable, Well Basis Points; and top/bottom condition surfaces