ABSTRACT

The other techniques will be briefly discussed here and then attention will be directed at providing some additional analytical solutions and describing the finite layer formulation.

7.1.1 Finite layer techniques The finite layer technique is applicable to situations where the hydrostratigraphy can be idealized as being horizontally layered with the soil properties being the same at any horizontal location within the layer. For these conditions, the governing equations can be considerably simplified by introducing a Laplace and Fourier transform (the latter only being required for 2D or 3D problems). The transformed equations can then be readily solved. This procedure parallels that adopted in the development of many analytic solutions. The difference between finite

layer solutions and analytic solutions arises from the fact that in the finite layer approach, the solution is inverted numerically rather than analytically. As a consequence, it is possible to examine more complicated and realistic situations.