ABSTRACT
Essentially all natural groundwater ows are three dimensional (3D). at is, the average velocity of a percolating water particle is represented by a vector that has three components. A simple example is the 3D radial ow toward a well (see Chapters 10 and 11). However, there are many situations in which the velocities are nearly coplanar or there is radial symmetry. In these cases the ow can be analyzed as two dimensional (2D) with sucient accuracy for many engineering problems. An example is the inltration of water into a series of long, parallel horizontal tile drains. Away from the pipe extremities, the shape of the water table is independent of the location along the pipe
3.1 Introduction ...............................................................................................................................73 3.2 Pressure, Suction, Piezometric Head, and Hydraulic Gradient .........................................74 3.3 e Motion of Groundwater ....................................................................................................76 3.4 Flow rough Porous Media: Darcy’s Law ............................................................................77
