ABSTRACT
The objective of this chapter is to show the logical development of equations that explain and predict the movement of groundwater in two-and three-dimensions (2D and 3D) as observed in nature. Flow of groundwater is a special case of fluid flow in porous media, and is governed by the laws of physics, in particular the laws of fluid mechanics. Fluid mechanics deals with the motion of fluids and with the forces exerted on solid bodies in contact with fluids. The fundamental principles are conservation of mass and conservation of momentum. It will be shown that these fundamental principles are sufficient to explain groundwater flow.
