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Automated dispersion mapping of surface waves

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Author: Westerhoff, R.S. · Noorlandt, R.P.
Type:article
Date:2008
Publisher: European Association of Geoscientists and Engineers, EAGE
Institution: TNO Bouw en Ondergrond
Source:14th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface 2008, 15 September 2008 through 17 September 2008, Krakow
Identifier: 493125
Keywords: Geosciences · Data processing · Geophysics · Hydraulic structures · Sensor networks · Surface waves · Automated processing · Dispersion curves · Dispersion mapping · Geophysical sensors · Inversion methods · Realtime processing · Surface wave data · Visualization process · Automation · Geological Survey Netherlands · Energy / Geological Survey Netherlands

Abstract

With the increasing amount of innovative geophysical sensors and sensor networks there is a need for faster and more controlled data processing and interpretation in order to cope with the abundance of data coming from monitoring systems. In this article, we are presenting a possible method to deal with automated processing of multi-station Rayleigh wave data. We use the strong points of the visualization process of the MASW method (Park et al. 1999) and combine them with an automated dispersion curve mapping procedure. By doing this, we are presenting a possible alternative for fast and repeatable real-time processing of surface wave data. By presenting a case study on a dike the operational speed of the method and the potential for use in monitoring studies is demonstrated. There is a short evaluation of alternative inversion methods that are able to perform the calculation to a subsurface layer model.