Monitoring the tidal response of a sea levee with ambient seismic noise

Planès, Thomas; Rittgers, Justin; Mooney, Michael A.; Kanning, W.; Draganov, Deyan

doi:10.1016/j.jappgeo.2017.01.025

Cited by 25 publications

(23 citation statements)

References 31 publications

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“…The possibility to perform surface-wave tomographies on the noise-extracted signals rapidly ensued (Shapiro & Campillo 2004;Shapiro et al 2005). In the following decade, noise-based seismology made its way to a wide range of applications for imaging and monitoring various structures such as volcanoes (e.g., Sens-Schönfelder & Wegler 2006;Brenguier et al 2008b;Obermann et al 2013;Sánchez-Pastor et al 2018), fault zones (e.g., Wegler & Sens-Schönfelder 2007;Brenguier et al 2008a;Chen et al 2010), mountain ranges (e.g., Macquet et al 2014;Singer et al 2017;González-Vidal et al 2018), carboncapture and sequestration reservoirs (e.g., Boullenger et al 2015;Gassenmeier et al 2015), and civil structures (e.g., Snieder & Ş afak 2006;Le Feuvre et al 2015;Planès et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Ambient-noise tomography of the Greater Geneva Basin in a geothermal exploration context

Planès

Obermann

Antunes

et al. 2019

Geophysical Journal International

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SUMMARYThe Greater Geneva Basin is one of the key targets for geothermal exploration in Switzerland. Until recently, information about the subsurface structure of this region was mostly composed of well-logs, seismic reflection lines, and gravity measurements. As part of the current effort to further reduce subsurface uncertainty, and to test passive seismic methods for exploration purposes, we performed an ambient-noise tomography of the Greater Geneva Basin. We used ∼1.5 yr of continuous data collected on a temporary seismic network composed of 28 broad-band stations deployed within and around the basin. From the vertical component of the continuous noise recordings, we computed cross-correlation functions and retrieved Rayleigh-wave group-velocity dispersion curves. We then inverted the dispersion curves to obtain 2-D group-velocity maps and proceeded to a subsequent inversion step to retrieve a large-scale 3-D shear-wave velocity model of the basin. We discuss the retrieved features of the basin in the light of local geology, previously acquired geophysical data sets, and ongoing geothermal exploration. The Greater Geneva Basin is an ideal natural laboratory to test innovative geothermal exploration methods because of the substantial geophysical data sets available for comparison. While we point out the limits of ambient-noise exploration with sparse networks and current methodology, we also discuss possible ways to develop ambient-noise tomography as an affordable and efficient subsurface exploration method.

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Section: Introductionmentioning

confidence: 99%

Ambient-noise tomography of the Greater Geneva Basin in a geothermal exploration context

Planès

Obermann

Antunes

et al. 2019

Geophysical Journal International

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“…Civil engineering structures are more and more instrumented in a sustainable way, in order to ensure the security of populations. Perturbation-based seismic methods, such as the use of ambient noises in the context of sea dikes (Le Feuvre et al, 2015;Planès et al, 2017;Joubert et al, 2018) may allow to better understand their evolution in the face of aging, by providing relative variations of the surface wave velocity as a function of time. Nevertheless, these methods require accurate reference models to start with to ensure a precise localization of heterogeneities.…”

Section: Discussionmentioning

confidence: 99%

“…As said in the introduction section, we choose to focus on coastal sea dikes which can exhibit asymmetric geometries and strong slopes on the sea side, contrary to most of river dikes studied for example by Karl et al (2011) and Planès et al (2017). The reference geometry model ( Fig.1(a)) is a simplified version of the sea dike of Les Moutiersen-Retz (France) already studied by Le Feuvre et al (2015) and Joubert et al (2018).…”

Section: Models and Acquisitionmentioning

confidence: 99%

“…Le Feuvre et al (2015) develop crosscorrelation-based passive MASW methods suitable for sea dike monitoring using sea waves or anthropogenic noise as continuous seismic sources to retrieve surface wave signal and produce highquality dispersion diagrams. Planès et al (2017) successfully test a seismic-interferometry technique on an earthen levee using retrieved impulse signal from cross-correlation of anthropogenic ambient seismic noise. Joubert et al (2018) develop a passive monitoring method, using sea waves as seismic sources, and retrieve shear-wave velocity perturbations, related to water content in the sea dike body, with respect to a background velocity model previously inferred using effective dispersion curve inversion.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Physical Properties of a Sea Dike Using Multichannel Analysis of Surface Waves and 3D Forward Modeling

Pageot¹,

Feuvre²,

Leparoux³

et al. 2017

Proceedings

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Seismic surface waves analysis methods have been widely developed and tested in the context of subsurface characterization and have demonstrated their effectiveness for sounding and monitoring purposes. Given their efficiency, surface waves methods have been used in a variety of contexts, including civil engineering applications. However, at this particular scale, many structures exhibit 3D geometries which drastically limit the efficiency of these methods since they are mostly developed under the assumption of a semi-infinite 1D layered medium without topography. Taking advantages of wave propagation modeling algorithm development and high-performance computing center accessibility, it is now possible to consider the use of a 3D elastic forward modeling algorithm for the inversion of surface wave dispersion. We use a parallelized 3D elastic modeling code based on the spectral element method which allows to obtain accurate synthetic data with very low numerical dispersion and a reasonable numerical cost. In this study, we choose a sea dike as a case example. We first show that their longitudinal geometry and structure may have a significant effect on dispersion diagrams of Rayleigh waves. Then, we investigate the sensitivity of the dispersion diagrams to small velocity and layer thickness perturbations, and show the limitations of the standard 1D surface wave methods approach. Finally, we demonstrate in this context the benefits of using both a 3D forward modeling engine and the whole dispersion diagram, instead of the dispersion curves only.

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“…HVSR provides information about the resonance behaviors of lithomorphologies and geomorphological features (Galea et al, 2014). More recent applications of noise based techniques are microzonation studies based on seismic site response (Parolai et al, 2004), in the study of dynamical behaviour of buildings (Gallipoli et al, 2010;Nakata et al, 2013), crustal tomography through noise correlation techniques (Curtis et al, 2006), shallow crustal velocity profiling (Panzera & Lombardo 2013), monitoring of earth dams and levees by noise interferometry (Planès et al, 2015(Planès et al, , 2017, underground mining (Olivier et al, 2015 ) as well as active volcanoes (Ballmer et al, 2013;Cannata et al, 2017). Noise data can also potentially provide high resolution spatio-temporal information about the landscape dynamics and evolution (Méric et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Resposta em Microtremor de um Movemento de Massa no Distrito Federal, Brasil

et al. 2017

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The present study provides a brief description of the ambient noise recorded at a slow moving mass movement in Ribeirão Contagem Basin. The area is an interesting natural laboratory as river detachment processes in a number of different stages can be identified and are easily accessible. We investigate the site dynamic characteristics of the study area by recording ambient noise time-series at nine points, using portable nine three-component short period seismometers. The time-series are processed to give both horizontal to vertical spectral ratio (HVSR) curves as well as time-frequency plots of noise power spectral density (SPD). The HVSR curves illustrate and quantify aspects of site resonance effects due to the local geological setting. Probability density function (PDF) shows that noise level lies well between new high noise model (NHNM) and new lower noise model (NLNM) and their probabilities are higher above 2 Hz. HVSR curves present a uniform lithologically controlled peak at 2 Hz. Directional properties of the wavefield are determined by beamforming method. The f-k analysis results in the E-W component show that at 5 Hz phase velocities are close to 1700 m/s while at 10 Hz dropped to 250 m/s. We observed that between 5 and 16 Hz the incoming wavefield arrive from 260 degrees. Further studies will apply a detailed noise analysis for relating the dynamics of the landslide (which can be retriggered by river erosion as well as rainfalls and seismic shaking) to possible changes in detectable physical properties. Keywords: Seismic noise; Power Spectral Density; Probability Density Function; HVSR; f-k analysis ResumoO estudo apresentado fornece uma ampla descrição do ruído ambiental registrado de um deslizamento de encosta lento localizado na bacia do Ribeirão Contagem no Distrito Federal. A área de estudo é um laboratório natural na medida que os processos erosivos do rio podem ser analisados em diferentes estágios de evolução dentro de um setor de fácil acesso. A pesquisa abrange o estudo das características dinâmicas da área por meio do registro das séries temporais do ruído ambiental em nove pontos mediante o uso de sismómetros de período curto e três componentes. As series temporais são processadas para obter as curvas de relação espectral horizontal-vertical (HVSR) e também os gráficos tempo:frequência dos espectros de potência (SPD). As curvas HVSR ilustram e quantificam aspectos dos efeitos de ressonância local devidos ao ambiente geológico. A função de desnsidade de probabilidade (PDF) mostra que os níveis de ruído registrados estão enquadrados entre os limites conhecidos como NHNM (new high noise model) e NLNM (new lower noise model) e que suas probabilidades são maiores acima de 2 Hz. As curvas HVSR apresentam um pico de resposta uniforme litológicamente controlado a 2 Hz. As propriedades direcionais do campo de ondas são determinadas pelo método da viga (beamforming method). A análise dos resultados na componente EW indica que na fase de 5 Hz a velocidade está próxima de 1700 m/s enquanto qu...

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Monitoring the tidal response of a sea levee with ambient seismic noise

Cited by 25 publications

References 31 publications

Ambient-noise tomography of the Greater Geneva Basin in a geothermal exploration context

Ambient-noise tomography of the Greater Geneva Basin in a geothermal exploration context

Assessment of Physical Properties of a Sea Dike Using Multichannel Analysis of Surface Waves and 3D Forward Modeling

Resposta em Microtremor de um Movemento de Massa no Distrito Federal, Brasil

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