Erkundung des oberflaechennahen Untergrundes von Deponien, Altlasten und Standorten neu anzulegender Deponien mit dispersiven seismischen Wellen Schlussbericht

Seismic surface-waves can be used to explore the structure of the near-surface underground of waste sites and waste deposits. They are helpful to determine the lateral extent of waste sites and the construction of a macro model of the area surrounding waste sites and waste deposits. In addition, seismic surface-waves can be recorded during a refraction seismic survey without adding much field-effort. If possible, the interpretation should be carried out in connection with the refraction seismic interpretation. Seismic surface-waves are very sensitive to the distribution of shear-wave velocities. Thus, the results are a valuable supplement in the frame of refraction seismic interpretation. For the interpretation of surface-wave signals, a dispersion analysis has to be carried out. Strong lateral heterogeneities have to be taken into account. However, no suitable analysis method for this case existed up to now. In the scope of this report such a method was developed. Additionally, a technique to recompress the dispersive signals is presented. With the method, the dispersive signals are transformed into non-dispersive signals on the basis of an estimated model. The quality of the process is closely connected to the quality of the model assumption. Both methods are successfully applied to synthetic examples and a field example. (orig.)SIGLEAvailable from TIB Hannover: F96B874+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman