Integrated geophysical methods to characterize urban subsidence in Butte, Montana, U.S.A.

Prudhomme, K.; Khalil, Mohamed A.; Shaw, Glenn D.; Speece, Marvin A.; Zodrow, Katherine R.; Malloy, Thomas M.

doi:10.1016/j.jappgeo.2019.03.004

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…Based on the geophysical characteristics, various geophysical surveys have been performed such as ERT (Hong et al, 2015;Ungureanu et al, 2017), GPR (Giorgi and , seismic refraction (Giorgi and Cardenas-Soto et al, 2020), multi-channel analysis of surface waves (MASW) (Kidanu et al, 2020), gravity (Cardenas-Soto et al, 2020), frequency-domain electro-magnetic and self-potential survey (Prudhomme et al, 2019). In the urban environment, GPR survey is performed mostly due to di culty of survey due to surrounding conditions such as asphalt roads.…”

Section: Introductionmentioning

confidence: 99%

Electrical resistivity tomography to detect ground loosened zone near excavation region in an urban site of ground subsidence, South Korea

Song

Kim

Cho

et al. 2022

Preprint

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Ground subsidence in urban environment due to excessive development and deteriorated underground urban facilities is serious social problem. Geophysical surveys were applied to estimate distribution and scale of cavities and subsidence. In this study, electrical resistivity tomography (ERT) was performed near the subsidence occurred on road in urban area. The subsidence arose due to leak of groundwater and soil into neighboring excavation region. The survey line was located between the major subsidence area and excavation region. Since ERT data are affected by rapid topographic change or surrounding structure, influences of the excavation to data were analyzed through field-scale numerical modeling. The effect of excavation should be considered to interpret ERT data, as it can be estimated wrong anomaly. In 2D interpretation, a method of performing inversion after correcting the resistivity data including the effect of excavation was proposed. This method was proved first using the field-scale numerical model including excavation region and subsurface anomaly assuming loosened zone and then applied to field data. In addition, the ERT data were interpreted by using existing a 3D in-house algorithm, which can deal with excavation region. Both of inversion results demonstrated that conductive anomalies of loosen zone appeared stronger in more specific area compared to before considering the excavation effect.

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Section: Introductionmentioning

confidence: 99%

Electrical resistivity tomography to detect ground loosened zone near excavation region in an urban site of ground subsidence, South Korea

Song

Kim

Cho

et al. 2022

Preprint

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“…They found that the area is characterized by paleochannels and that the sinkhole-prone area corresponds to these paleochannels. More so, an integrated study using self-potential, electrical resistivity imaging (ERI), and frequency-domain electromagnetic was successfully carried out to characterize urban subsidence in Butte, Montana, U.S.A. (Prudhomme et al, 2019). In the case study by (Sastry and Mondal, 2013), they employed microgravity, induced polarization imaging and electrical resistivity imaging to detect Salna sinking zones at Garhwal Himalaya, India.…”

Section: Introductionmentioning

confidence: 99%

Application of microgravity and electrical resistivity imaging techniques to identify ground subsidence prone zone

Mohammed¹

2021

Acta Geodynamica Et Geomaterialia

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Owing to the disastrous consequences of ground subsidence in the urban area, great attention had always been accorded to areas with suspected signs of subsidence occurrence in order to mitigate its effect. Microgravity and electrical resistivity imaging (ERI) survey techniques were conducted at a parking lot of which possible occurrence of subsidence is anticipated due to the increased exposure of surface cracks and very slight depression. This study aimed to map and delineate the subsurface condition of the area with the view of revealing probable subsidence prone zones within the study area. To this end, the microgravity survey data was acquired at a station interval of 2 m. Pole-dipole configuration with 2 m electrode separation was adopted for the electrical resistivity imaging survey. The two methods showed good correlation with each other and proved their effectiveness in imaging the subsurface. A large proportion of the subsurface area was found to be residual soil (mainly silt and or clayey sand) with saturated zones identified by low gravity (< -40.94 mGal) and resistivity (<150 Ω.m) values, which have the tendency to undergo expansion and contraction processes due to rise and fall in moisture content. The subsurface condition was found to be relatively stable, devoid of any subsidence triggering features such as voids or cavities. However, it is inferred to be unsuitable for engineering structures due to the expansive and contractive properties of the subsurface geomaterials (residual soil). Therefore, it is concluded that the area is not prone to subsidence and the surface cracks presents are mere effects of the expansion and contraction process, which could be avoided by the excavation of the expansive soil or good engineering design before the establishment of any structure.

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“…Knowledge of the hydrogeological setting in urban areas is crucial because it forms the basis for understanding the fate and distribution of the contaminants. In recent years, hydrogeophysical methods have become a valuable, non-invasive source of continuous data sections, significantly improving the data coverage and accuracy of the investigated urban areas (Bockhorn et al, 2015;Pazzi et al, 2016;Prudhomme et al, 2019). Geophysical methods have been applied at contaminated sites to identify fill materials and, in some cases, map contamination plumes (Boudreault et al, 2010;Maurya et al, 2017;Vaudelet et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeological modelling to support urban planning in harbour areas: A case study from Horsens, Denmark

Cen

Medhus

Andersen

et al. 2021

Preprint

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Historically, industries were in harbour areas of cities for easy access to transportation of resources. Today, transforming former industrial areas into living spaces has become attractive business. However, this transformation has often been challenged by high levels of soil contamination caused by the industrial use. Remediation measures are mandatory to ensure the public safety in the redeveloped areas. Detailed information about the contaminant type, distribution and transport mechanisms is required to address the contamination issues. This paper presents a workflow for investigations assisting decision making for construction work in redeveloped industrial areas. The workflow is applied to Horsens harbour (Denmark). In this area, renovation of the harbour walls introduces the risk of spreading of phenol contamination to planned construction areas. The study demonstrates how detailed information about the geology and hydrology at the site allows for scenario modelling of contaminant transport, guiding remediation efforts and aiding decision makers in developing the harbour area.

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Integrated geophysical methods to characterize urban subsidence in Butte, Montana, U.S.A.

Cited by 13 publications

References 13 publications

Electrical resistivity tomography to detect ground loosened zone near excavation region in an urban site of ground subsidence, South Korea

Electrical resistivity tomography to detect ground loosened zone near excavation region in an urban site of ground subsidence, South Korea

Application of microgravity and electrical resistivity imaging techniques to identify ground subsidence prone zone

Hydrogeological modelling to support urban planning in harbour areas: A case study from Horsens, Denmark

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