Near-Surface Characterization Using Simultaneous Joint Inversion of Refracted and Surface Waves – A Case Study

2014 ◽  
Author(s):  
M. Speziali ◽  
S. Re ◽  
M. Clementi ◽  
L. Viertel Herrera ◽  
A. Al Quadi ◽  
...  
Keyword(s):  
Surface Waves ◽  
Surface Characterization ◽  
Joint Inversion ◽  
Near Surface

Joint Inversion Scheme of Dispersive Surface Waves for Near-surface Structure Estimation

2015 ◽  
Author(s):  
Tongju Gong* ◽  
Miao Liu ◽  
Yiming Wang ◽  
Zhiwei Zhu ◽  
Baoqing Zhang
Keyword(s):  
Surface Waves ◽  
Surface Structure ◽  
Joint Inversion ◽  
Near Surface ◽  
Structure Estimation

Dispersion and the dissipative characteristics of surface waves in the generalized S-transform domain

Geophysics ◽  
2012 ◽  
Vol 77 (1) ◽  
pp. V11-V20 ◽  
Author(s):  
Roohollah Askari ◽  
Robert J. Ferguson
Keyword(s):  
Cost Function ◽  
Surface Waves ◽  
Joint Inversion ◽  
Scaling Factor ◽  
Surface Shear ◽  
Low Frequencies ◽  
Near Surface ◽  
S Transform ◽  
Generalized S Transform ◽  
The Cost

Wavenumber, group velocity, phase velocity, and frequency-dependent attenuation characterize the propagation of surface waves in dispersive, attenuating media. We use a mathematical model based on the generalized [Formula: see text] transform to simultaneously estimate these characteristic parameters for later use in joint inversion for near-surface shear wave velocity. We use a scaling factor in the generalized S transform to enable the application of the method in a highly dispersive medium. We introduce a cost function in the [Formula: see text]-domain to estimate an optimum value for the scaling factor. We also use the cost function to generalize the application of the method for noisy data, especially data with a low signal-to-noise ratio at low frequencies. In that case, the estimated wavenumber is perturbed. As a solution, we estimate wavenumber perturbation by minimizing the cost function, using Simulated Annealing. We use synthetic and real data to show the efficiency of the method for the estimation of the propagation parameters of highly dispersive and noisy media.

scholarly journals Difficulties with phase spectrum unwrapping in spectral analysis of surface waves nondestructive testing of pavements

1992 ◽  
Vol 29 (3) ◽  
pp. 506-511 ◽  
Author(s):  
M. O. Al-Hunaidi
Keyword(s):  
Spectral Analysis ◽  
Nondestructive Testing ◽  
Surface Waves ◽  
Phase Spectrum ◽  
Correction Procedure ◽  
Near Surface ◽  
Surface Profiling ◽  
Usual Procedure

Spectral analysis of surface waves (SASW) is a nondestructive and in situ method for determining the stiffness profiles of soil and pavement sites. This method involves the generation and measurement of surface Rayleigh waves. By exploiting the dispersive characteristic of these waves in layered systems, the SASW method provides information on the variation of stiffness with depth. This paper presents the results of a case study for near-surface profiling of a pavement site using the SASW method. In this study, inconsistencies were observed in the dispersion curve of the site when the usual procedure of unfolding the relative phase spectrum was followed. A correction procedure to eliminate these inconsistencies is suggested and discussed. The thickness and wave velocities of the various layers obtained with the SASW method, after applying the correction procedure, matched closely those determined from cored samples and cross-hole tests. Key words : nondestructive testing, pavement, layered media, Rayleigh wave, spectral analysis, shear wave velocity, wave propagation.

Near-surface characterization, challenges, and solutions for high-density, high-productivity, broadband vibroseis point-source and receiver survey—A case study

2013 ◽  
Author(s):  
Alexander Zarkhidze ◽  
Claudio Strobbia ◽  
Abdallah Ibrahim ◽  
Luis Viertel Herrera ◽  
Abdulla Al Qadi ◽  
...  
Keyword(s):  
Point Source ◽  
Surface Characterization ◽  
High Density ◽  
Near Surface ◽  
High Productivity

Use of Surface Waves for Near-Surface Characterization and Drilling Hazard Reduction

2017 ◽  
Author(s):  
S. Al Mesaabi ◽  
M. Mohammed ◽  
B. Tertrais ◽  
T. Bardainne ◽  
K. Garceran
Keyword(s):  
Surface Waves ◽  
Surface Characterization ◽  
Near Surface ◽  
Hazard Reduction

High-resolution velocity modeling by seismic-airborne TEM joint inversion: A new perspective for near-surface characterization

2016 ◽  
Vol 35 (11) ◽  
pp. 977-985 ◽  
Author(s):  
Daniele Colombo ◽  
Gary McNeice ◽  
Diego Rovetta ◽  
Ernesto Sandoval-Curiel ◽  
Ersan Turkoglu ◽  
...  
Keyword(s):  
High Resolution ◽  
Surface Characterization ◽  
Joint Inversion ◽  
Near Surface ◽  
Velocity Modeling ◽  
New Perspective

Joint Inversion of Active Sources and Ambient Noise for Near‐Surface Structures: A Case Study in the Balikun Basin, China

2018 ◽  
Author(s):  
Yinhe Luo ◽  
Jing Lin ◽  
Yingjie Yang ◽  
Limin Wang ◽  
Xiaozhou Yang ◽  
...  
Keyword(s):  
Ambient Noise ◽  
Joint Inversion ◽  
Surface Structures ◽  
Near Surface
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