Relevant bibliographies by topics / Electrical resistivity method

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Electrical resistivity method'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Electrical resistivity method"

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Zainal, Muzakir, and Marwan Marwan. "A Field Survey of Soil Corrosivity Based on Electrical Resistivity Method." Journal of Aceh Physics Society 8, no. 1 (2019): 16–21. http://dx.doi.org/10.24815/jacps.v8i1.12768.

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Salah satu upaya mitigasi bencana yang perlu dilakukan sebelum pembangunan fasilitas pada kawasan industri yaitu kajian korositivitas tanah. Sifat korositivitas dapat menyebabkan rusaknya infrastruktur bangunan dalam ambang batas tertentu, Kajian korositivitas tanah telah dilakukan pada kawasan industri Kecamatan Julok, Kabupaten Aceh Timur dengan tujuan untuk melakukan investigasi dan pemetaan tingkat korositivitas tanah menggunakan metode resistivitas Wenner 4 pin dan perhitungan pH meter untuk tanah. Akuisisi data dilakukan dengan titik pengukuran sebanyak tujuh titik, dimana setiap titik pengukuran data terdistribusi pada lokasi yang akan digunakan untuk pembangunan industri dengan total panjang lintasan pengukuran 6 km. Hasil pengolahan data resistivitas 1D diperoleh dua jenis pelapisan tanah. Lapisan pertama lebih didominasi oleh kondisi tanah yang tidak korosif dengan nilai resistivitas 20 – 580 Ohm.m. Sedangkan lapisan kedua dapat diduga sebagai lapisan yang korosif dengan nilai resistivitas tanah 5 – 20 Ohm.m. One of the disaster mitigation that needs to be done before facilities development in industrial area is study of soil corrosivity. Within a certain threshold, this corrosivity can cause damage to building infrastructure. This research was done in the industrial area of Julok Subdistrict, East Aceh Regency with the aim of investigating and mapping the level of soil corrosion using a 4-pin Wenner resistivity method and calculating the pH for soil. Data acquisition was carried out at seven measurement point, where each measurement point is distributed at a location that will be used for industrial development with 6 km length. Inversion of resistivity data gives two type of soil layer. The first layer is more complete by non-corrosive soil conditions with resistivity values of 20 - 580 Ohm.m. While the second layer can be interpreted as a corrosive layer with a soil resistivity value of 5-20 Ohm.m. Keywords: korosi, resistivitas, wenner, pH, mitigasi bencana
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Cho, In-Ky. "Recent Trend in Electrical Resistivity Method." Journal of the Korean Society of Mineral and Energy Resources Engineers 57, no. 5 (2020): 506–26. http://dx.doi.org/10.32390/ksmer.2020.57.5.506.

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Suzuki, Minoru, and Hiromitsu Katsui. "Method for Measuring Anisotropic Electrical Resistivity." Japanese Journal of Applied Physics 51 (November 20, 2012): 123102. http://dx.doi.org/10.1143/jjap.51.123102.

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Suzuki, Minoru, and Hiromitsu Katsui. "Method for Measuring Anisotropic Electrical Resistivity." Japanese Journal of Applied Physics 51, no. 12R (2012): 123102. http://dx.doi.org/10.7567/jjap.51.123102.

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Waremra, Richard S., and Philipus Betaubun. "Analysis of Electrical Properties Using the four point Probe Method." E3S Web of Conferences 73 (2018): 13019. http://dx.doi.org/10.1051/e3sconf/20187313019.

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There has been conducted Physics research on a material, that is, monitoring electric characteristic of a material using four-point probe method. This research measures current and voltage. The result is used to determine resistivity of a material. The research uses 2 samples, that is, chalk and charcoal. The result shows the resistivity of the sample in the form of bulk (t>s) for chalk has high resistivity on voltage of 6.6 Volt. Meanwhile, resistivity on thick sheet (t<s) has high resistivity on voltage of 7 Volt. On the charcoal material, large resistivity (t>s) is in 6 Volt, and on large resistivity (t<s) is in 6.6 Volt.
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Hazreek, Z. A. M., S. Rosli, W. D. Chitral, et al. "Soil Identification using Field Electrical Resistivity Method." Journal of Physics: Conference Series 622 (June 22, 2015): 012030. http://dx.doi.org/10.1088/1742-6596/622/1/012030.

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Taiwo, Saheed Mayowa, Jong-Sub Lee, and Hyung-Koo Yoon. "Analytical and experimental studies to obtain electrical resistivity in a small-scaled laboratory test." GEOPHYSICS 82, no. 5 (2017): E267—E275. http://dx.doi.org/10.1190/geo2016-0491.1.

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Electrical resistivity surveys have been used to investigate soil behavior at the microscale, and thus they require a method for obtaining accurate electrical resistivity. The previously suggested geometric factor ignores the dimensions of the electrode due to the scale effect present in field conditions, thus necessitating a more appropriate method to capture reliable electrical resistivity for laboratory tests. Our objective is to suggest an analytical solution to obtain reliable electrical resistivity in laboratory testing. Models are verified through laboratory tests and statistical methods. The relationship between electrical resistance and electrical resistivity is analytically defined by Ohm’s law and Gauss’s flux theorem. Consequently, the underlying importance of electrode capacitance including electrode length and diameter for estimating electrical resistivity is evaluated. In addition to the electrical resistivity estimated based on Ohm’s law (EOL), capacitance based on the single-electrode model (CSM) and the multiple-electrode model (CMM), electrical resistivity based on the conventional calibration method is also addressed. Four-equally spaced electrode probe system is designed to measure the electrical resistance. The estimated electrical resistivity based on each model (EOL, CSM, CMM, and [Formula: see text]) is compared with the electrical resistivity estimated from the conductivity meter to verify the suggested models. The electrical resistivity estimated from EOL shows high reliability. Our results underline the significance of EOL model in the conversion of measured electrical resistance into electrical resistivity in laboratory tests.
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Santoso, Budy. "IDENTIFICATION OF AQUIFER USING RESISTIVITY GEOELECTRIC METHOD IN REGIONAL OF BEBANDEM, KARANG ASEM, BALI." EKSAKTA: Berkala Ilmiah Bidang MIPA 19, no. 1 (2018): 24–34. http://dx.doi.org/10.24036/eksakta/vol19-iss1/101.

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Bungaya Kangin Village, Bebandem District, Karangasem Regency, Bali Province consists of paddy fields and settlements, required therefore a water source / aquifer that can meet all these needs. One of the Geophysical Methods that can identify the aquifer is the Geoelectric Method. Geoelectric method used in this research is Resistivity Method. Data acquisition using Vertical Electrical Sounding (VES) and Electrical Resistivity Tomography (ERT) Methods. VES method is a method of measurement to determine the variation of resistivity vertically at one point. Electrical Resistivity Tomography (ERT) method is a method of measuring resistivity on soil surface / rock by using many electrode (51 electrode), to obtain sub-surface resistivity variation lateraly and verticaly, to obtain sub-surface image. The equipment used for geoelectric measurements is Resistivity Meter of Naniura NRD 300 Hf which has been equipped with a switchbox to adjust the displacement of 51 electrodes. Based on the resistivity modeling results, the aquifers in the study area were found in rough sandstones with resistivity values : (49 - 100) Ohm.m.
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Siddiqui, Fahad Irfan, and Syed Baharom Azahar Bin Syed Osman. "Electrical Resistivity Based Non-Destructive Testing Method for Determination of Soil’s Strength Properties." Advanced Materials Research 488-489 (March 2012): 1553–57. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1553.

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Precise determination of engineering properties of soil is essential for proper design and successful construction of any structure. The conventional methods for determination of engineering properties are invasive, costly and time-consuming. Electrical resistivity survey is an attractive tool for delineating subsurface properties without soil disturbance. Reliable correlations between electrical resistivity and other soil properties will enable us to characterize the subsurface soil without borehole sampling. This paper presents the preliminary results of an ongoing research on correlations of electrical resistivity with strength properties of soil. Soil investigations, field electrical resistivity survey (VES) and laboratory electrical resistivity measurements were conducted. From the data analysis, significant correlations have been obtained between resistivity and moisture content and angle of internal friction. Weaker correlations have been observed for cohesion and unit weight of soil.
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Liu, X. C. "Application of Electrical Resistance Method in study of Sic/Al Composite." Advanced Composites Letters 2, no. 2 (1993): 096369359300200. http://dx.doi.org/10.1177/096369359300200205.

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In SiC/Al composite there are obvious correspondent relations between electrical resistivity and F/M interfaces change as well as Vf. Both the F/M reaction reaction and Vf can be determined by means of the composite electrical resistivity, if the resistivity is revised by a factor small than 1.
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Dissertations / Theses on the topic "Electrical resistivity method"

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Hassan, Asem Ahmed. "Electrical resistivity method for water content characterisation of unsaturated clay soil." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10806/.

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This thesis presents an automated multi-electrode resistivity system which was developed for the water content characterisation of unsaturated clay soil. The system controls 64 electrodes in a fully automated procedure, offering continuous real-time data acquisition, which is one of the recent advances in resistivity instrumentation. The system was tested using a wide range of high precision reference resistors and different soils, and validated using commercial standard instruments. The results indicated a high precision, accuracy and resolution of the outputs, with a measurement error of 0.19% (maximum 0.80%) in a four-electrode method and 0.21% in an automated acquisition mode. Water content characteristics of mechanically compacted BIONICS clay soil was extensively investigated, with particular focus on the effect of wetting, drying and cracking on soil properties. It was found that the electrical resistivity of soil is sensitive to water content and compaction conditions. Experimental relationships that relate soil resistivity, volumetric water content and degree of saturation were developed. These relationships are useful to estimate the in situ water content. The resistivity behaviour of clay soils subjected to drying and wetting procedures was discussed. Soil water content and microstructure changes are key controlling parameters for resistivity behaviour. Numerical and experimental techniques were used to characterise cracking in clay soils. The results showed that cracks have anomalous high resistivity values that can be distinguished from the background, and changing cracking depth, length, width and orientation causes significant changes in soil resistivity. As the cracks form barriers that disturb the flow of electrical current, the depth and length of the crack have the major influence on soil resistivity. It was concluded that the degree of saturation or volumetric water content is a more reliable parameter than the gravimetric water content to calibrate in situ resistivity data against water content and soil resistivity can be used as a useful indicator for monitoring water content changes in clay soils subjected to drying and wetting cycles.
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Liu, Shuyun. "A sequential inverse approach for hydraulic tomography and electrical resistivity tomography: An effective method for site characterization." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/279846.

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Hydraulic tomography (i.e., a sequential aquifer test) has recently been proposed as a method for characterizing aquifer heterogeneity. In this study a sequential inverse approach is developed to interpret results of hydraulic tomography. The approach uses an iterative geostatistical inverse method to yield the effective hydraulic conductivity of an aquifer, conditioned on each set of head/discharge data. To efficiently include all the head/discharge data sets, a sequential conditioning method is employed. Two-dimensional numerical experiments were conducted to investigate the optimal sampling scheme for the hydraulic tomography. The effects of measurement errors and uncertainties in statistical parameters required by the inverse model were also investigated. The robustness of this inverse approach was demonstrated through its application to a hypothetical, three-dimensional, heterogeneous aquifer. Two sandbox experiments were conducted to evaluate the performance of the sequential geostatistical inverse approach under realistic conditions. One sandbox was packed with layered sands to represent a stratified aquifer while the other with discontinuous sand bodies of different shapes and sizes to represent a more complex and realistic heterogeneous aquifer. The tomography was found ineffective if abundant head measurements were collected at closely spaced intervals in a highly stratified aquifer. While it was found beneficial when head measurements were limited and the geological structure was discontinuous. The sequential inverse approach for hydraulic tomography was extended for electrical resistivity tomography. Numerical experiments were conducted to demonstrate the robustness of this approach for delineating the resistivity distribution in the subsurface and to investigate effectiveness of different sampling arrays of the ERT: the surface, the down-hole, and the combination of the surface and down-hole array. Orientation of bedding was found to dictate the effectiveness of the ERT layout. Samples were collected to quantify spatial variability of the resistivity-moisture relationship in the field. Numerical experiments then illustrated how the spatially varying relationship exacerbated the level of uncertainty in the interpretation of change of moisture content based on the estimated change in resistivity. A sequential inverse approach was then developed to estimate water content with less uncertainty by considering the spatial variability of the resistivity-moisture relationship and incorporating point moisture measurements and ERT data sets.
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Gagliano, Michael Paul. "Assessment Of Electrical Resistivity Method To Map Groundwater Seepage Zones In Heterogeneous Sediments At Mirror Lake, NH." Master's thesis, Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/83757.

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Geology<br>M.S.<br>Temporal and spatial variability makes locating zones of seepage difficult using traditional point measurements. The goal of this project was to employ 2D electrical resistivity, 3D electrical resistivity, and time-lapse resistivity to improve our understanding of how small-scale heterogeneity controls seepage. We collected underwater electrical resistivity data along the southwest shore of Mirror Lake, NH, as part of a multi-year assessment of the utility of geophysics for mapping groundwater seepage beneath lakes. We found that resistivity could predict out-seepage. A line collected perpendicular-to-shore along the lake bottom starting 27-m off shore and continuing 27-m on shore (1-m electrode spacing) showed the water table dipping away from the lake, the steep gradient indicative of high out-seepage in this area. Resistivity could also broadly delineate high-seepage zones. An 80-m line collected parallel to shore using 0.5-m electrode spacing was compared with measurements collected the previous year using 1-m electrode spacing. Both data sets show the transition from high-seepage glacial outwash to low-seepage glacial till, demonstrating reproducibility. However, even the finer 0.5-m electrode spacing was insufficient to resolve the heterogeneity well enough to predict seepage variability within each zone. In two sections along this 80-m line, one over glacial outwash, the other over till, we collected 14 parallel lines of resistivity, 13.5-m long and spaced 1-m apart to form a 13.5 x 13-m data grid. These lines were inverted using two methods: 1) individually using a 2-D inversion program and then interpolated to create a 3-D volume and 2) they were jointly inverted to create a 3-D volume. Examination of resistivity slices through these volumes highlights the heterogeneity of both these materials, suggesting groundwater flow takes indirect flow paths. However, only when there was a strong contrast in resistivities (the till section) could a possible groundwater flow path be identified. Time-lapse resistivity was used to determine the effect of the top layer of fine sediments. A 13.5-m long time-lapse resistivity survey was completed in the glacial till using 0.5-m electrode spacing showed that disturbing only a few millimeters of superficial sediments produced up to a 6% change in resistivity. This change was accompanied by changes in seepage, indicating that the fine layer of sediments is a major control on seepage patterns. This project showed that combining several electrical resistivity methods provides a better understanding of subsurface heterogeneity and aids in the placement of point measurements. However, in such heterogeneous material the goal of predicting seepage variation still remains difficult.<br>Temple University--Theses
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Gandolfo, Otavio Coaracy Brasil. "Um estudo do imageamento geoelétrico na investigação rasa." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/44/44133/tde-25042008-142218/.

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Este trabalho trata do estudo detalhado e com profundidade das metodologias de aquisição, processamento e interpretação de dados de caminhamentos elétricos, sob o enfoque de investigações voltadas a objetivos rasos. Nas técnicas de aquisição 2D (caminhamentos) foram utilizados os arranjos dipolo-dipolo, pólo-dipolo, pólo-pólo e Wenner, permitindo comparações quanto à eficácia dos mesmos. Foi testada uma genuína aquisição 3D utilizando o arranjo pólo-pólo, avaliando-se suas potencialidades e limitações. O Schlumberger foi o arranjo empregado para a execução de SEVs que auxiliaram na interpretação e quantificação das seções geoelétricas 2D, principalmente no que se refere à distribuição vertical das resistividades. Os modelos geoelétricos 2D foram obtidos com um programa de inversão de dados (RES2DINV) que, em tese, é capaz de corrigir as distorções observadas nas pseudo-seções de resistividade elétrica aparente correspondentes aos diversos arranjos utilizados no trabalho. Estes modelos constituem imagens que apresentam uma melhor correspondência com a realidade geológica em subsuperfície, o que facilita a interpretação dos resultados. Procurou-se explorar o máximo as potencialidades do programa de inversão, visando a obtenção de imagens de boa qualidade. A interpretação geofísica foi sempre efetuada com base em informações diretas disponíveis (furos de sondagem, trincheiras, poços e afloramento). Em uma escala de investigação rasa, a resolução passa a ter uma importância fundamental. Procurou-se demonstrar que, quando são utilizados pequenos espaçamentos entre eletrodos (menores que quatro metros), particularmente no caso do dipolo-dipolo, é possível a execução de mais níveis de investigação em profundidade (superiores a oito) ainda com uma boa qualidade do sinal. Por outro lado, os arranjos dipolo-dipolo e pólo-pólo permitem um número muito maior de níveis de investigação sem a limitação das pequenas aberturas, mas com alguma perda em definição. Como conseqüência, tem-se um significativo aumento na quantidade de dados gerados na seção, o que contribui para o incremento da resolução bi-dimensional. Outro aspecto testado e avaliado foi o da utilização de múltiplos espaçamentos entre eletrodos sobre o mesmo perfil de levantamento. Este interessante procedimento garante, além de resolução nas porções rasas (graças aos espaçamentos pequenos), o alcance de maiores profundidades de investigação (devido aos espaçamentos maiores) em uma mesma seção. A eficácia desta prática foi verificada tanto na construção das pseudo-seções, como nos modelos geoelétricos gerados pela inversão dos dados (modelagem). A metodologia foi testada em três distintas áreas tendo por objetivo o mapeamento de um nível d´água raso, a determinação da profundidade e conformação de topo rochoso e o mapeamento de uma provável pluma de contaminação. Além de uma ampla revisão bibliográfica sobre o assunto, foi também abordado neste trabalho o controverso tema da profundidade de investigação que de fato se verifica com os arranjos de eletrodos comumente empregados em eletrorresistividade. Procurou-se, com esta tese, contribuir para um melhor entendimento acerca do tema \"imageamento geoelétrico\" e alguns tópicos a ele relacionados, quais sejam: arranjo de eletrodos, procedimentos para se conseguir um bom volume de dados na seção, utilização eficiente do programa de inversão que gera os modelos e, finalmente, a interpretação dos resultados sempre balizada por informações diretas disponíveis e por outros métodos ou técnicas geofísicas de apoio.<br>This paper addresses a detailed, in-depth study on data aquisition, processing and interpretation methodologies for 2D electrical profilings, focusing on investigations oriented to shallow targets. Two-dimensional (electrical profilings) acquisition techniques were used on a wide range of arrays - dipole-dipole, pole-dipole, pole-pole and Wenner arrays - for efficiency comparison purposes. A real 3D acquistion was tested with the pole-pole array in order to check its potential use and limitations. Schlumberger was the array used for SEVs, which helped to interpret and quantify 2D geoelectrical sections, especially as to the vertical distribution of resistivity. The 2D geoelectrical models were generated with an inversion computer program (RES2DINV), which basically corrects any distortions found in the apparent resistivity pseudosections corresponding to the arrays included in this study. These models create images that better match the subsurface geological reality, therefore simplifying the interpretation of results. We tried to explore the full potential use of the inversion computer program for good quality images. The geophysical interpretation was always based on the subsurface information available (boreholes, trenches, wells and outcrop). Resolution is critical in a shallow investigation scale. This study tried to show that the use of small spacings between electrodes (less than four meters), particularly in dipole-dipole arrays, allows for more in-depth investigation levels (greater than eight) without compromising signal quality. On the other hand, dipole-dipole and pole-pole arrays allow for a larger number of investigation levels without small spacings limitations, but with a slight loss of definition. Consequently, there is a significant increase in the amount of data generated at the section, enhancing 2D resolution. Another aspect tested and assessed was the use of multiple spacings between electrodes on the same survey profile. In addition to resolution in shallow sections (thanks to small spacings), this interesting procedure allows deeper investigation levels (due to larger spacings) in the same section. The efficacy of this practice was verified both in the development of pseudo-sections and in the geoelectrical models generated by inversion modelling. The methodology was tested in three different areas in order to map a shallow water table, determine the depth and shape of the bedrock, and map a potential contaminant plume. In addition to the broad literature review available, this paper also covered the controversial topic of depth investigation actually present in electrode arrays typically used in electrical resistivity methods. This thesis tried to provide a better understanding of \"geoelectrical resistivity imaging\" and related topics such as: electrode array, procedures required to generate good volumes of data in the section, efficient use of the inversion computer program behind the models and, lastly, interpretation of results, always based on the subsurface information available and on other supporting geophysical methods or techniques.
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Yamakawa, Yousuke. "Use of an electrical resistivity method together with a combined penetrometer-moisture probe to survey hydrological properties of natural slopes." Kyoto University, 2011. http://hdl.handle.net/2433/142324.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第16126号<br>農博第1862号<br>新制||農||989(附属図書館)<br>学位論文||H23||N4596(農学部図書室)<br>28705<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授 水山 高久, 教授 太田 誠一, 教授 谷 誠<br>学位規則第4条第1項該当
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Fejfarová, Marie. "Možnosti detekce obsahu vody v pórovitém prostředí metodou elektrické impedanční spektrometrie." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-233811.

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This doctoral thesis with the title “Possibilities of Detecting the Water Content in a Porous Medium Using the Method of Electrical Impedance Spectrometry introduces electrical impedance spectrometry (EIS) as an indirect electrical method of measurement and a tested apparatus for application in water management practice and in material engineering. A wide range of porous media in the area of water management have been narrowed within the preparation of this dissertation thesis to available samples of chiefly sandy soils and in material engineering to typical building materials, which are still solid burnt brick and timber. Measurement took place in the Laboratory of Water Management Research of the Department of Water Structures and in the Laboratory of the Department of Building Materials and Components at the Faculty of Civil Engineering of Brno University of Technology, in the Laboratory of Soil Mechanics of the company GEOtest, a.s. and in the Laboratory of the foreign university KU Leuven, KHBO in the City of Oostende, Belgium. The experiments performed required not only the production of special constructions of measuring probes and their connection, but also modifications of stations at which measurement was carried out. It is possible to use this doctoral dissertation thesis as a methodological manual of how to apply the measuring apparatus based on the EIS method in monitoring changes in the water content in selected porous media due to hydrodynamic stress imposed on it.
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Gimenez, Leandro Maria. "Relação da condutividade elétrica aparente com algumas propriedades físico-hídricas e com a variabilidade espacial dos solos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-17122013-121535/.

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A variabilidade das propriedades físicas do solo apresenta impacto sobre o desempenho das atividades de produção agrícola. Métodos indiretos para obtenção de informações sobre as propriedades do solo com interesse agronômico são utilizados com o intuito de favorecer o uso de insumos de modo mais adequado. A condutividade elétrica aparente do solo (CEa) é influenciada por diversas propriedades, muitas delas interrelacionadas e com variabilidade em curta distância, sendo difícil a separação dos diversos fatores. As medidas de CEa são usualmente tomadas em superfície com arranjos de eletrodos para prospecção de um volume de solo proporcional à distância entre eles. Neste trabalho foi utilizada uma metodologia que permitiu identificar algumas das propriedades com maior impacto sobre a CEa, merecendo destaque aquelas relacionadas ao espaço poroso do solo. A caracterização detalhada da variação da CEa ao longo do perfil do solo e sua comparação com aquela obtida a partir da sondagem elétrica vertical permitiram identificar algumas limitações desta técnica. A presença de camadas com variação de diversas propriedades físicas e de umidade no perfil do solo alterou os valores observados em superfície. A relação entre a distância de separação dos eletrodos no arranjo com quatro pontas igualmente espaçadas, e a profundidade de prospecção, coeficiente k, oscilou entre 0,35 e 0,70 para os solos LVd, LAd e PVe avaliados. A sondagem elétrica empregada na caracterização de variabilidade espacial na horizontal e em profundidade em uma área com teores de argila oscilando entre 150 e 379 g kg-1 na camada 0 a 0,2 m e entre 225 e 326 g kg-1 na camada 0,6 a 0,8 m apresentou resultado satisfatório.<br>The variability of soil physical properties has an impact on the performance of agricultural production activities. Indirect methods for obtaining information on the soil properties with agronomic interest are used to allow the use of inputs more appropriately. The apparent soil electrical conductivity ( ECa ) is influenced by several properties , many of them interrelated and presenting variability in short distances, being difficult to separate the various factors. ECa measures are usually taken in surface, using electrode arrangements for prospecting a soil volume proportional to the distance between them. In this work, a methodology was used that identified some of the properties with the greatest impact on the ECa, with emphasis to those related to soil porous space. The detailed characterization of the variation of ECw throughout the soil profile and its comparison with that obtained from the vertical electrical sounding was carried to identify certain limitations of this technique. The presence of several layers with varying physical properties and moisture in the soil profile changed values obtained from surface sounding. The relationship between the separation of the electrodes in the array with four points equally spaced, the Wenner array, and the depth of exploration, coefficient k, ranged between 0.35 and 0.70 for the soils LVd , LAd PVe and evaluated. A survey was done for the ECa characterization of spatial variability in the horizontal and along soil profile in an area with clay content ranging from 150 to 379 g kg - 1 in the layer from 0 to 0.2 m and between 225 and 326 g kg - 1 in layer 0, 6 to 0.8 m. The use of ECa for characterizing this variability showed satisfactory results.
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Shan, Chunling. "Natural and Controlled Source Magnetotelluric Data Processing and Modeling." Doctoral thesis, Uppsala universitet, Geofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229917.

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In this thesis, four studies using different geophysical electromagnetic methods are presented. In the first study dealing with airborne measurements, the noise response due to the rotation of the aircraft and the aircraft itself as a metallic conductive body on the Earth's electromagnetic response in very low frequency and low frequency band was investigated. The magnetic fields are independent of the aircraft in the VLF band and part of the LF band. But at higher frequencies (above 100 kHz), the signals are more influenced by the aircraft. The aircraft also generates its own noise frequencies which are mixed with the radio transmitter signals. The second and third studies are applications of radio-, controlled source-magnetotellurics and electrical resistivity tomography methods at a quick-clay landslide site in southwest Sweden. The data are processed and modeled in 2D and 3D, and the models are compared with high-resolution seismic and geotechnical data. The obtained results were further validated and refined by performing synthetic tests in the second study. The third study shows that the 3D models provide larger and more continuous volume of the quick clay structure than traditional 2D models. Both studies have shown that integrated application of geophysical methods for landslides is ideal. Quick clays often overlie the coarse-grained layers showing an increase of resistivity values in the models. In the fourth study, a new audio magnetotelluric data acquisition technique is developed and is named moving magnetotellurics (MMT). In this new technique, the magnetic sensors are placed on the ground and only 15 to 20 minutes data are acquired for each station, which usually is enough to cover the frequency range 30-300 Hz. The new technique is more efficient and convenient than the traditional magnetotelluric method, and test measurements have shown that it is an applicable method in shallow depth studies.
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Xu, Biwen. "Development of electrical resistivity imaging methods for geological and archaeological prospecting." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5540/.

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Rodríguez, Fernández Jesús. "Variación térmica de la resistividad eléctrica en nuevos materiales metálicos: compuestos de tierras raras y aleaciones amorfas." Doctoral thesis, Universidad de Cantabria, 1987. http://hdl.handle.net/10803/22695.

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En la presente memoria se describe el método para la medida de la variación térmica de la resistividad entre 10 y 300 K que hemos puesto a punto en nuestros laboratorios de la Universidad de Cantabria. Dicho método es el de cuatro puntas con corriente alterna y detección síncrona. También se analizan, mediante el método de los elementos finitos, los efectos de la geometría de la muestra y posición de los contactos en la relación entre la resistividad observada experimentalmente y la resistividad real, haciendo hincapié en el caso de muestras anisótropas. Posteriormente aplicamos esta técnica al estudio de diversas series de materiales: 1) Los compuestos RPt que cumplen la Ley de De Gennes y en los que hemos podido determinar los valores de la masa efectiva m* y de la constante de canje. 2) Los compuestos RNi2Si2 en las que se puede observar una relación entre la resistividad magnética y las estructuras magnéticas. 3) Los compuestos CeyLa1-yNixPt1-x, en las que se estudia el efecto Kondo 4) Los amorfos metálicos (Co1-x(Fe5Ni5)x)75Si15B10 en los que se observa un mínimo en la resistividad a bajas temperaturas así como variaciones en lnT, T2 y T a temperaturas bajas, intermedias y altas respectivamente<br>The present report describes the method for measuring the temperature dependence of the resistivity between 10 and 300 K that we have developed in our laboratories at the University of Cantabria. This is a four-probe method using ac current and synchronous detection. Also it is analyzed, using the finite element method, the effects of the sample geometry and contacts position in the relationship between the real resistivity and resistivity observed experimentally, even in the case of anisotropic samples. Subsequently we apply this technique to the study of different family of materials: 1) RPt compounds which follow the De Gennes Law, allowing us to determine the values of the effective mass m * and exchange constant. 2) The compounds RNi2Si2 in which it is possible to establish a relationship between the magnetic resistivity and the magnetic structures. 3) The compounds CeyLa1-yNixPt1-x, in which we study the Kondo effects. 4) The amorphous Co1-x(Fe5Ni5)x)75Si15B10 metals, in which there is a minimum in the resistivity at low temperatures as well as variations in LnT, T2 and T at low, intermediate and high temperatures respectively.
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Books on the topic "Electrical resistivity method"

1

Zoldy, Derek Allan. The feasibilty [sic] of electrical resistivity sounding as a non-destructive method to assess blast damage. Laurentian University, School of Engineering, 1992.

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Poole, Vickie L. Assistance to six small water-short communities in Illinois: Electrical resistivity surveys. Illinois State Geological Survey, 1986.

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Chiou, Wen-An, Helmut Coutelle, Andreas Decher, et al. Bentonites -. Edited by Stephan Kaufhold. E. Schweizerbart Science Publishers, 2021. http://dx.doi.org/10.1127/bentonites/9783510968596.

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&lt;p&gt;&lt;b&gt;Bentonites&lt;/b&gt; are rocks mostly consisting of swelling clay minerals. They were first described from the Cretaceous Benton Shale near Rock River, Wyoming, USA. &lt;/p&gt; &lt;p&gt; Because of their useful properties (e.g. highly adsorbent, cation exchanging, swelling), bentonites have many uses, in industry (among them as drilling mud, purification agent, binder, adsorbent, paper production), culture (for e.g. pottery) and medicine/cosmetics/cat litter, civil engineering, and in the future even in the disposal of high-level nuclear waste. &lt;/p&gt; &lt;p&gt; Particular chemical characteristics of bentonite clay minerals are rather variable but critically determine their suitability for a particular application. &lt;/p&gt; &lt;p&gt; The 15 specialist authors discuss bentonite terminology, classification and genesis and use in eight chapters. Individual chapters deal with the methods bentonites are analysed with, their properties and performance in terms of parameters such as cation exchange capactiy, rheology, coagulation concentraion, water uptake capacity, free swelling, and electrical resistivity (amongst others). &lt;/p&gt; &lt;p&gt; A chapter is dedicated to the sources of bentonites, the technology employed to produce them, and how quality control is carried out both in the mine and the laboratory. A further chapter is dedicated to methods of processing the mined material, different activation methods, drying, grinding, and purification. &lt;/p&gt; &lt;P&gt; Use cases for bentonites are discussed in a chapter of its own. References, a section on norms and standards, and a list of abbreviations complete the text. &lt;/p&gt; &lt;p&gt; The volume addresses students, researchers, and professionals in the mineral industry dealing with bentonite and their clay-mineral constituents, quality assessement and control, and persons that use bentonites in their products. &lt;/p&gt;
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Book chapters on the topic "Electrical resistivity method"

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Wysowska, Anna, and Jolanta Pierwoła. "Electrical Resistivity Imaging Method in Investigating Post-Glacial Geomorphological Forms." In Geophysics in Mining and Environmental Protection. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19097-1_12.

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Tsuchiyama, Toshihiro, Taiga Taniguchi, Daichi Akama, et al. "Estimation of Solute Carbon Concentration by Electrical Resistivity Method in Low-Carbon Martensitic Steel." In Proceedings of the International Conference on Martensitic Transformations: Chicago. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76968-4_39.

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Kumar, Dewashish. "High Resolution Electrical Resistivity Tomography and Self-Potential Mapping for Groundwater and Mineral Exploration in Different Geological Settings of India." In Self-Potential Method: Theoretical Modeling and Applications in Geosciences. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79333-3_11.

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Xi, Yun, Jin Yu, Li-Na Mao, and Fang-Qiu Zu. "Investigation of the Relationship of the Melt Structures and Solidification Behaviors of Cu-Sb70 Alloy Explored by Electrical Resistivity Method." In EPD Congress 2012. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118359341.ch25.

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Reddy, T. V. K., S. S. Reddy, and N. Janardhana Raju. "Delineation of Groundwater Resources in Drought Prone Area of Upper Godduvanka River Basin, Chittoor District, Andhra Pradesh Using Electrical Resistivity Method." In Water Science and Technology Library. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-011-0391-6_15.

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Calès, B., and P. Abélard. "Methods for Electrical Resistivity Measurement Applicable to Medium and Good Electrical Conductors." In Compendium of Thermophysical Property Measurement Methods. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3286-6_9.

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Duan, Wei, Guojun Cai, Songyu Liu, Kuikui Li, and Anand J. Puppala. "Comparison of Different Electrical Resistivity Measurement Methods of Soft Marine Clays." In Proceedings of GeoShanghai 2018 International Conference: Multi-physics Processes in Soil Mechanics and Advances in Geotechnical Testing. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0095-0_53.

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Islam, Nasir Ul, Prashant Garg, and Pardeep Singh. "Electrical Resistivity Technique (ERT) as a Substitute for Destructive Methods in Soil Exploration." In Lecture Notes in Civil Engineering. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02707-0_62.

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Manstein, Yuri, and Andrea Scozzari. "Pollution Detection by Electromagnetic Induction and Electrical Resistivity Methods: An Introductory Note with Case Studies." In The Handbook of Environmental Chemistry. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/698_2014_277.

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Priju, C. P., Jiby Francis, P. R. Arun, and N. B. Narasimha Prasad. "Delineation of Paleochannels in Periyar River Basin of Kerala Using Remote Sensing and Electrical Resistivity Methods." In Hydrologic Modeling. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5801-1_27.

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Conference papers on the topic "Electrical resistivity method"

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Sastry Rambhatla, G., and P. Ranjan Pujari. "Stabilized Analytical Signal Method in Electrical Resistivity Tomography." In 59th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.131.gen1997_p135.

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Zha, Fusheng, Songyu Liu, Yanjun Du, Kerui Cui, and Long Xu. "Characterization of Compacted Loess by Electrical Resistivity Method." In GeoShanghai International Conference 2010. American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41101(374)11.

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Mansour, M., and A. Kassem. "Field Investigation of Weak Soils Using Electrical Resistivity Method." In EAGE Conference on Exploring the Synergies between Surface and Borehole Geoscience - Petrophysics meets Geophysics. European Association of Geoscientists & Engineers, 2000. http://dx.doi.org/10.3997/2214-4609-pdb.19.b17.

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Asaadian, H., B. Soltani Soulgani, and R. Najafi. "Water-cut Metering by Flow Electrical Resistivity Measurement Method." In 80th EAGE Conference and Exhibition 2018. EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201801747.

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Chitea, Florina. "FILLED AND UNFILLED UNDERGROUND VOIDS EVALUATION USING ELECTRICAL RESISTIVITY METHOD." In 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings. STEF92 Technology, 2019. http://dx.doi.org/10.5593/sgem2019/1.1/s05.099.

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Chiriac, A., F. Chitea, and A. Serban. "Evaluation of Hydrocarbon Pollution Plume Extension Using Electrical Resistivity Method." In 77th EAGE Conference and Exhibition 2015. EAGE Publications BV, 2015. http://dx.doi.org/10.3997/2214-4609.201412537.

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Myat, Maung T., Amos Wamweya, Oleg Kovin, Neil L. Anderson, and Jonathan L. Robison. "Application of Electrical Resistivity Method in Steeply Dipping Karst Terrane." In 11th Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst. American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41003(327)10.

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Duracka, Miroslav, Katarina Kocurova, Michal Sistik, and Alena Kozakova. "New method for evaluation of corrosive resistivity of impregnants." In 2020 International Conference on Diagnostics in Electrical Engineering (Diagnostika). IEEE, 2020. http://dx.doi.org/10.1109/diagnostika49114.2020.9214636.

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Wempe, Wendy, and Gary Mavko. "The Electrical Resistivity - Acoustic Velocity Relationship: A Method For Constraining Porosity." In 13th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2000. http://dx.doi.org/10.3997/2214-4609-pdb.200.2000_073.

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Bily, Ivan. "UTILIZATION OF POINT CLOUDS FOR GEOPHYSICAL METHOD ELECTRICAL RESISTIVITY TOMOGRAPHY INTERPRETATION." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/14/s05.059.

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Reports on the topic "Electrical resistivity method"

1

Schenkel, C. J. The electrical resistivity method in cased boreholes. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5185469.

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PETERSEN SW. TECHNICAL EVALUATION OF ELECTRICAL RESISTIVITY METHODS AT THE DEPARTMENT OF ENERGY HANFORD SITE. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/926269.

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Yang, X., T. A. Buscheck, K. Mansoor, and S. A. Carroll. Likelihood of Brine and CO2 Leak Detection using Magnetotellurics and Electrical Resistivity Tomography Methods. Office of Scientific and Technical Information (OSTI), 2017. http://dx.doi.org/10.2172/1393348.

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Ley, M., Zane Lloyd, Shinhyu Kang, and Dan Cook. Concrete Pavement Mixtures with High Supplementary Cementitious Materials Content: Volume 3. Illinois Center for Transportation, 2021. http://dx.doi.org/10.36501/0197-9191/21-032.

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Fly ash is a by-product of coal combustion, made up of particles that are collected through various methods. This by-product has been used successfully as a partial Portland cement replacement in concrete, but the performance predictions of fly ash in concrete have been difficult to predict, especially at high fly ash replacement rates. This study focuses on comparing the performance of concrete with a variety of fly ash mixtures as well as the particle distribution and chemical makeup of fly ash. The slump, unit weight, compressive strength, and isothermal calorimetry tests were used to measure the performance of concrete at 0%, 20%, and 40% fly ash replacement levels. The particle distribution of fly ash was measured with an automated scanning electron microscope. Additionally, the major and minor oxides from the chemical makeup of fly ash were measured for each mixture and inputted into a table. The particle distribution and chemical makeup of fly ash were compared to the performance of slump, unit weight, compressive strength, isothermal calorimetry, and surface electrical resistivity.
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Lutken, Carol, Leonardo Macelloni, Marco D'Emidio, John Dunbar, and Paul Higley. Temporal Characterization of Hydrates System Dynamics beneath Seafloor Mounds. Integrating Time-Lapse Electrical Resistivity Methods and In Situ Observations of Multiple Oceanographic Parameters. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1234434.

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