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Near-surface structure of downtown Jinan, China; application of ambient noise tomography with a dense seismic array


Urban geophysics ups the ante in the world of applied geophysics, which requires innovative thinking and seemingly off-the-wall approaches, if for no other reason than the settings. Ambient-noise-tomography (ANT) can play a pivotal role in yielding subsurface information in urban areas, which is capable of dealing with challenges related to these scenarios (e.g., human activities and low signal-to-noise ratio). In this study, the ANT was conducted to investigate the near-surface shear-velocity structure in the surrounding area of the Baotu Spring Park in downtown Jinan, Shandong Province, China. Quiet clear Rayleigh waves have been obtained by the cross-correlation, which indicates that strong human activities, such as moving vehicles and municipal engineering constructions, can produce approximately isotropic distribution of noise sources for high-frequency signals. The direct surface-wave tomographic method with period-dependent ray-tracing was used to invert all surface-wave dispersion data in the period band 0.2-1.5 s simultaneously for 3D variations of shear-velocity (Vs) structure. Our results show a good correspondence to the geological features with thinner Quaternary sediments, the geological structural characteristic of the limestone surrounded by the igneous which has the highest velocity than that of the limestone in the study area, and several concealed faults of which specific location has been detected at depth. The results demonstrate that it is possible to successfully use ANT with high-frequency signal in an urban environment provided a detailed planning and execution is implemented.

ISSN: 1083-1363
EISSN: 1943-2658
Serial Title: Journal of Environmental & Engineering Geophysics
Serial Volume: 24
Serial Issue: 4
Title: Near-surface structure of downtown Jinan, China; application of ambient noise tomography with a dense seismic array
Title: Geophysics for urban underground space studies
Author(s): Feng LiangWang ZhihuiLi HailongLiu KaiWang Tao
Author(s): Liu, Lanboprefacer
Author(s): Qian Rongyiprefacer
Affiliation: Chinese Academy of Geological Sciences, Beijing, China
Affiliation: University of Connecticut, Department of Geosciences, Storrs, CT, United States
Pages: 641-652
Published: 201912
Text Language: English
Publisher: Environmental and Engineering Geophysical Society, Englewood, CO, United States
References: 38
Accession Number: 2020-006974
Categories: Engineering geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., geol. sketch maps
N34°30'00" - N38°00'00", E115°00'00" - E122°34'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Abstract, copyright, Environmental & Engineering Geophysical Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202006
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