Print Email Facebook Twitter Optimizing Acquisition Parameters for MASW in Shallow Water Title Optimizing Acquisition Parameters for MASW in Shallow Water Author Diaferia, G. Kruiver, P.P. Drijkoningen, G.G. Faculty Civil Engineering and Geosciences Department Geoscience & Engineering Date 2013-06-10 Abstract Analogous to the use of Rayleigh waves in MASW on land, Scholte waves can be used to derive shear wave velocity profiles for the subsurface under water. These profiles are useful for dredging operations, offshore wind farms, oil rigs and pipelines. We have determined the optimal acquisition set up for the detection Scholte waves in shallow water. The nearest offset, receiver spacing and number of channels have been varied in a finite difference model consisting of a water layer on top of a sediment layer and a half space. The best configuration is a nearest offset of 10 m, receiver spacing of 1 m and 48 channels. When the seafloor is not horizontal, the source/receiver spread should follow the topography. When the distance between the source and the sea floor becomes too large, no Scholte waves are detected and subsequently no reliable Vs profile can be retrieved. In order to test the acquisition set up for a more realistic subsurface, a dipping layer and a filled channel structure were modeled. Whereas the inversion results for the dipping layer were satisfactory, the channel structure displayed large differences relative to the model, especially on the flanks. To reference this document use: http://resolver.tudelft.nl/uuid:4eb2592b-fb7b-42e0-abe2-40ef9e9ecfc1 Publisher EAGE Source 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013, London, UK, 10-13 June 2013 Part of collection Institutional Repository Document type conference paper Rights (c) 2013 The Author(s) Files PDF 294510.pdf 1.02 MB Close viewer /islandora/object/uuid%3A4eb2592b-fb7b-42e0-abe2-40ef9e9ecfc1/datastream/OBJ/view