Geo-technical Investigation of Soil Properties in Hatsalatladi Village, Botswana
Dataset consists of gridded magnetic data which was obtained from the Botswana Geoscience Institute. Multichannel analysis of surface wave data (MASW) was acquired on there profiles in Hatsalatladi village with a 24-channel seismograph (RAS24 from Seistronix) in order to determine the stiffness of soil and other properties such as Poisson's Ratio, bulk modulus and Young's modulus. Soil tests involved sieve analysis, shrinkage limit, liquid and plastic limit measurements.
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Dataset consists of gridded magnetic data which was obtained from the Botswana Geoscience Institute. The magnetic grid was displayed using Oasis Montaj package in order apply necessary the filtering. The SEG-2 format multichannel analysis of surface wave data (MASW) was used to approximate the shear-wave velocity with depth by utilizing the dispersion properties of Rayleigh waves. Elastic waves were produced by a sledgehammer, and a 24-channel seismograph (RAS24 from Seistronix) was used for data acquisition with geophones equally spaced at 2 m intervals with an offset of 4 m. The spread was then shifted by 4 m until the whole profile was covered. MASW data was processed with SurfSeis version 3 from the Kansas Geological Survey. The processing of MASW data involves three steps, as outlined by Park et al. (1999): (1) acquiring multichannel field records; (2) extracting dispersion curves, and (3) inverting dispersion curves to obtain 1D variation of shear-waves with depth. 2D variation of shear wave velocity with depth was inverting all the 1D's. Soil tests involved sieve analysis, shrinkage limit, liquid and plastic limit measurements.