Evaluation of MASW Data Acquired with a Hydrophone Streamer in a Shallow Marine Environment

Kaufmann, Ronald Douglas; Xia, Jianghai; Benson, Richard Craddock; Yuhr, Lynn B.; Casto, Daniel W.; Park, Choon B.

doi:10.2113/jeeg10.2.87

Cited by 49 publications

(13 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar result has been reported by others for both SASW and MASW (e.g. Stokoe et al, 1994, Park et al, 1999and Kaufmann et al, 2005. Independently carried out seismic CPT (SCPT) data, by the University of British Columbia, was also available (Eidsmoen et al, 1985 andLunne et al, 2003a) and these data are also shown in Figure 3(a).…”

Section: Results For Clay Sites Onsoysupporting

confidence: 84%

“…Kaufmann et al (2005) (for shallow marine sediments), Harry et al (2005) (for a fluvial aquifer), Donohue et al (2003Donohue et al ( , 2004) (for very stiff Irish glacial till and very soft clays and silts from Central Ireland respectively) and Park et al (1999) have shown that V s (and hence G max ) can be obtained cheaply and reliably using the Multichannel Analysis of Surface Waves (MASW) method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites

Long¹,

Donohue²

2007

Can. Geotech. J.

View full text Add to dashboard Cite

Abstract:The Multichannel Analysis of Surface Waves (MASW) technique, used to determine shear wave velocity (V s ) and hence small strain stiffness (G max ), has recently generated considerable interest in the geophysics community. This is because of the ease of carrying out the test and analysis of the data. The objective of this work was to assess the repeatability, accuracy and reliability of MASW surface wave measurements for use in engineering studies. Tests were carried out at 8 wellcharacterised Norwegian clay, silt and sand research sites where V s had already been assessed using independent means. As well as being easy and quick to use MASW gave consistent and repeatable results and for the clay sites the MASW V s profiles were similar to those obtained from other techniques. Reasonable results were also obtained for the silt and sand sites, with the best result being obtained for the finer silt.This work also confirms that MASW V s clay profiles are comparable to those obtained by correlation with CPT. For these sites there also seems to be a good correlation between normalised small strain shear modulus and in situ void ratio or water content and the data fit well with published correlations for clays.

show abstract

Section: Results For Clay Sites Onsoysupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites

Long¹,

Donohue²

2007

Can. Geotech. J.

View full text Add to dashboard Cite

show abstract

“…Applications of the method include elastic property determination (Donohue et al, 2004 andFoti, 2003), shallow anomaly detection (Park et al, 1998a), bedrock mapping , seismic characterization of pavements Ryden et al, 2001), stratigraphic layer detection (Harry et al, 2005), Poisson's ratio distribution (Ivanov et al, 2000a), and seismic characterization of underwater sediments Ivanov et al, 2000b, Kaufmann et al, 2005.…”

Section: Introductionmentioning

confidence: 99%

Assessment of an MASW Approach Incorporating Discrete Particle Modeling

Donohue

Long

2008

JEEG

View full text Add to dashboard Cite

A Discrete Particle Scheme (DPS) consisting of interacting circular particles is utilized to examine a popular Multichannel Analysis of Surface Waves (MASW) approach. Synthetic earth models of various complexity are generated using the DPS and analyzed by selected MASW dispersion and inversion techniques. For simple two layer and multilayer models where velocity increases with depth, inversion using the dominant fundamental mode results in MASW profiles of shear wave velocity [Formula: see text] that closely match the true synthetic [Formula: see text] profiles. Inversion using the default parameters produces gradational increases in velocity, rather than true discontinuities. When tested on a multilayer model containing a low velocity layer (LVL), inversion using a fundamental mode assumption results in a moderate increase in error. MASW field tests at a highly uniform site in Norway (Onsøy) and a site with distinctive layer boundaries in Ireland (Ballinasloe) result in highly repeatable profiles of [Formula: see text]. Resolution of dispersion curves at low frequencies [Formula: see text] is a problem at the Ballinasloe test site, which limits the depth of penetration of the technique. MASW inversion results compare excellently with downhole seismic cone tests at the Onsøy test site and reasonably with a seismic refraction survey at the Ballinasloe site.

show abstract

“…During the last decade, successful results have been obtained using surface/Scholte waves to infer the shear-wave properties of the subsurface (Park et al, 1999;Kaufmann et al, 2005;Park et al, 2005). With this approach, surface-wave arrivals are selected, analyzed in terms of their dispersion characteristics, and inverted for a shear-wave model of the shallow subsurface.…”

Section: Introductionmentioning

confidence: 99%

Nongeometrically converted shear waves in marine streamer data

et al. 2012

View full text Add to dashboard Cite

Under certain circumstances, marine streamer data contain nongeometrical shear body wave arrivals that can be used for imaging. These shear waves are generated via an evanescent compressional wave in the water and convert to propagating shear waves at the water bottom. They are called "nongeometrical" because the evanescent part in the water does not satisfy Snell's law for real angles, but only for complex angles. The propagating shear waves then undergo reflection and refraction in the subsurface, and arrive at the receivers via an evanescent compressional wave. The required circumstances are that sources and receivers are near the water bottom, irrespective of the total water depth, and that the shear-wave velocity of the water bottom is smaller than the P-wave velocity in the water, most often the normal situation. This claim has been tested during a seismic experiment in the river Danube, south of Budapest, Hungary. To show that the shear-related arrivals are body rather than surface waves, a borehole was drilled and used for multicomponent recordings. The streamer data indeed show evidence of shear waves propagating as body waves, and the borehole data confirm that these arrivals are refracted shear waves. To illustrate the effect, finite-difference modeling has been performed and it confirmed the presence of such shear waves. The streamer data were subsequently processed to obtain a shear-wave refraction section; this was obtained by removing the Scholte wave arrival, separating the wavefield into different refracted arrivals, stacking and depth-converting each refracted arrival before adding the different depth sections together. The obtained section can be compared directly with the standard P-wave reflection section. The comparison shows that this approach can deliver refracted-shear-wave sections from streamer data in an efficient manner, because neither the source nor receivers need to be situated on the water bottom.

show abstract

Evaluation of MASW Data Acquired with a Hydrophone Streamer in a Shallow Marine Environment

Cited by 49 publications

References 20 publications

In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites

In situ shear wave velocity from multichannel analysis of surface waves (MASW) tests at eight Norwegian research sites

Assessment of an MASW Approach Incorporating Discrete Particle Modeling

Nongeometrically converted shear waves in marine streamer data

Contact Info

Product

Resources

About