Applications for capacitively coupled resistivity surveys in Florida

Garman, K. Michael; Purcell, Scott F.

doi:10.1190/1.1776744

Cited by 8 publications

(3 citation statements)

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“…Over the past few years, in the field of shallow geophysical investigations, the capacitively-coupled resistivity method (also referred to as the CCR method) has been one of the fast-growing geophysical research techniques [40,41].…”

Section: Ccr Surveysmentioning

confidence: 99%

Application of Combined Geophysical Methods for the Examination of a Water Dam Subsoil

Gołębiowski

Piwakowski

Ćwiklik

et al. 2021

Water

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The paper presents the results of geophysical measurements that were carried out in the vicinity of the water dam/water reservoir supplying the city of Bielsko-Biala with drinking water. The measurements were performed in order to non-invasively detect faults, fractured zones and areas filled with breccia, which may be, at the same time, a preferential path of groundwater flow. The aforementioned factors influence the stability of the dam. The general identification of the examined media was realized by the electrical resistivity tomography method. The ERT surveys were supplemented by capacitively-coupled resistivity. The electrical methods allowed them to recognize geological settings, indicate possible fault locations, and point out the fault plane as a path of water flow. The ground penetrating radar method detected fractured and filled water areas and underground water paths in the dam’s forefield as a result of the method’s very high resolution. The high resolution seismic reflection method provided a clear and high resolution image of the relatively deep geological structure and verified a location and the run of the faults. In general, the complex geophysical-geological interpretation enabled classification of the unconsolidated/fractured zones associated with faults as a place where the erosion process is the most intense and can bring danger on the dam. Finally, it was confirmed that the area should be the subject of geophysical monitoring.

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Section: Ccr Surveysmentioning

confidence: 99%

Application of Combined Geophysical Methods for the Examination of a Water Dam Subsoil

Gołębiowski

Piwakowski

Ćwiklik

et al. 2021

Water

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“…; Nyquist et al . ), coupled resistivity (Garmann and Purcell ), ground‐penetrating radar (GPR) (Henson et al . ; Carreon‐Freyre and Cerca ), proton magnetic resonance (Guérin and Benderitter ) and electromagnetics (Nyquist et al .…”

Section: State‐of‐the‐art Geophysical Karst Explorationmentioning

confidence: 99%

Spatial mapping of submerged cave systems by means of airborne electromagnetics: an emerging technology to support protection of endangered karst aquifers

Supper

Motschka

Ahl

et al. 2009

Near Surface Geophysics

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Karst aquifers represent important but very vulnerable sources for water supply to a significant part of the Earth's population. For sustainable use of these resources, development of integrated management tools based on numerical groundwater models is required. In principle karst aquifers are characterized by the presence of two distinct flow domains: the limestone matrix fractures and the conduits. A flow model of karst aquifers requires detailed, spatially distributed information on the hydrologic characteristics of the aquifer and flow paths. Geophysical methods determining the distribution of the electrical resistivities within the subsurface could provide such information. An international scientific research project was initiated to explore the potential of airborne electromagnetic mapping for providing such innovative information for improving groundwater modelling of karst aquifers. The project study area is located in the Sian Ka'an Biosphere Reserve located in Yucatán, Mexico, a coastal wetland of international importance. As a first step ground geoelectric and ground electromagnetic measurements were performed in March 2006 to determine the electrical properties of the Sian Ka'an Biosphere Reserve subsurface environment. These results were used for 3D forward modelling to calculate the expected airborne electromagnetic response. Based on these promising results, an airborne pilot survey was performed in 2007 to evaluate the applicability of airborne electromagnetic methodology. This survey covers an area of 40 square kilometres above the well-mapped Ox Bel Ha cave system. The results showed that the signature of the cave system could be clearly detected. The pilot survey offered as well the chance to define the limits of current state-of-the-art airborne data acquisition and inversion. The study helped to define the needs for further developments and improvements to establish the frequency domain electromagnetic method as a practical karst exploration method.water supply for a significant portion of the Earth's population (e.g., Darnault 2008).In order to protect karstic groundwater systems and associated ecosystems, it is necessary to develop integrated tools for sustainable management of these resources based on accurate coupled surface-/groundwater models. Although the mathematical formulation of such models is well established, results are mostly unsatisfactory. The reason for this is that both location and geometry of dominant karst features, controlling the flow, are either not known at all or not known with the required accu-

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“…Alternatively, electrodes can be placed directly above the landfill surface if it is covered with a conductive material (such as a clay cover). In the case of a landfill covered with a geomembrane, the electrostatic capacitively-coupled resistivity technique (Panissod et al, 2000;Garman and Purcell, 2004;Kuras et al, 2006) can be used to avoid losing instrumentation in the landfill following installation of the final geomembrane cover. Despite its potential advantages, the latter method has a limited depth of investigation and needs further development before being routinely applied for bioreactor monitoring.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Leachate Recirculation in a Bioreactor Landfill by 2-D Electrical Resistivity Imaging

Grellier¹,

Guérin²,

Robain³

et al. 2008

Journal of Environmental & Engineering Geophysics

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At bioreactor landfills, biodegradation parameters are carefully controlled to achieve faster stabilization of the waste mass. For example, liquid (leachate) injection into the waste mass is used to increase waste moisture content and thereby enhance waste degradation. The objective of this study is to validate the use of non-intrusive two-dimensional electrical resistivity imaging (ERI) for monitoring a liquid injection system, and to determine the relationship between measured resistivity and water content variations in waste. Temporal variations of waste electrical resistivity, during leachate recirculation, are mainly linked to water and ionic content variations. Two-dimensional ERI monitoring was carried out at a municipal solid waste landfill using a multi-channel resistivity meter to follow transient resistivity variations during leachate recirculation in the waste mass. Resistivity variations mainly correspond to variations in water content, and to temperature variations resulting from the injection of cold leachate into the warm waste mass. Laboratory experiments can be used to calibrate water content variations in the waste as a function of variations in electrical resistivity. Although such an approach is realistic for short measurement periods (hours), it is not reliable over longer time periods (months) since other parameters, such as biodegradation of the waste, may also influence its electrical resistivity.

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Applications for capacitively coupled resistivity surveys in Florida

Cited by 8 publications

References 0 publications

Application of Combined Geophysical Methods for the Examination of a Water Dam Subsoil

Application of Combined Geophysical Methods for the Examination of a Water Dam Subsoil

Spatial mapping of submerged cave systems by means of airborne electromagnetics: an emerging technology to support protection of endangered karst aquifers

Monitoring of Leachate Recirculation in a Bioreactor Landfill by 2-D Electrical Resistivity Imaging

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