Optimisation of Surface Wave Measurements in a Solid WasteLandfill Using Geostatistical Methods

In solid waste landfill site characterization studies in-situ techniques are more useful and reliable because of the difficulties related to taking undisturbed samples from the site. Among these techniques spectral analysis of surface waves (SASW) takes an important place. Spectral analysis of surface waves (SASW) is a non-intrusive method for subsurface investigation that uses surface wave dispersion to indirectly determine compression and shear wave velocities. The non-intrusive nature of the method eliminates many of the health and safety concerns typically associated with conventional borings for geoenvironmental investigations. However, like any other site investigation technique, SASW profiles are generally applicable strictly only at the locations at which they are developed.

In this paper geostatistical methodology has been used to interpolate the shear wave velocity measurements taken from discrete locations in a solid waste landfill. Kriging technique was used for interpolation. This application provides a better understanding of the stiffness distribution along the site.