scholarly journals Application of Electrical Resistivity Tomography (ERT) in the investigation of quaternary landslide zones, based on the selected regions of Płock slope

2014 ◽  
Vol 31 (2) ◽  
pp. 101-107 ◽  
Author(s):  
Łukasz Kaczmarek ◽  
Radosław Mieszkowski ◽  
Marcin Kołpaczyński ◽  
Grzegorz Pacanowski
Keyword(s):  
Electrical Resistivity ◽  
Safety Factor ◽  
Cross Sections ◽  
Land Surface ◽  
Electrical Resistivity Tomography ◽  
Mass Movement ◽  
Virgin Mary ◽  
Resistivity Tomography ◽  
Vistula River ◽  
Geophysical Surveys

Abstract The article shows the results of geophysical surveys performed by using Electrical Resistivity Tomography (ERT) method on selected region of Płock slope of a Tumski hill near Basilica of Assumption of the Blessed Virgin Mary in Płock and in Maszewo by the Vistula River a few kilometers north of Płock. The above-mentioned sections were selected due to landslide phenomena observed there. Geophysical surveys were conducted in order to verify the state of the distribution of electrical resistivity in the sectors where mass movement was identified. The electrofusion cross-section near Cathedral Basilica shows clays and sands. Also in ERT prospection a zone of loose soils with high resistance is clearly visible. The results of the ERT method from Maszewo, indicates historical land surface of a landslide and that the slope in Maszewo consists of cohesive deposits. In order to describe these particular issues, geological cross-sections and safety factor obtained by calculation are presented for the analyzed parts of the slope. The safety factor shows that probability of landslide activity near Cathedral Basilica is very unlikely and in Maszewo is very high

scholarly journals Identifying Changes in Sediment Texture along an Ephemeral Gravel-Bed Stream Using Electrical Resistivity Tomography 2D and 3D

2021 ◽  
Vol 11 (7) ◽  
pp. 3030
Author(s):  
Marcos A. Martínez-Segura ◽  
Carmelo Conesa-García ◽  
Pedro Pérez-Cutillas ◽  
Pedro Martínez-Pagán ◽  
Marco D. Vásconez-Maza
Keyword(s):  
Electrical Resistivity ◽  
Cross Sections ◽  
Electrical Resistivity Tomography ◽  
Environmental Changes ◽  
Subsurface Layer ◽  
Sediment Texture ◽  
Borehole Data ◽  
Resistivity Tomography ◽  
Gravel Bed ◽  
Basin Scale

Differences in deposit geometry and texture with depth along ephemeral gravel-bed streams strongly reflect fluctuations in bedload which are due to environmental changes at the basin scale and to morphological channel adjustments. This study combines electrical resistivity tomography (ERT) with datasets from borehole logs to analyse the internal geometry of channel cross-sections in a gravel-bed ephemeral stream (southeast Spain). The survey was performed through longitudinal and transverse profiles in the upper channel stretch, of 14 to 30 m in length and 3 to 6 m in depth, approximately. ERT values were correlated with data on sediment texture as grain size distribution, effective grain sizes, sorting, and particle shape (Zingg’s classification). The alluvial channel-fills showed the superposition of four layers with uneven thickness and arrangement: (1) the softer rocky substrate (<1000 Ω.m); (2) a thicker intermediate layer (1000 to 2000 Ω.m); and (3) an upper set composed of coarse gravel and supported matrix, ranging above 2000 Ω.m, and a narrow subsurface layer, which is the most resistive (>5000 Ω.m), corresponding to the most recent armoured deposits (gravel and pebbles). The ERT results coupled with borehole data allowed for determining the horizontal and vertical behaviour of the materials in a 3D model, facilitating the layer identification.

Preliminary use of ground-penetrating radar and electrical resistivity tomography to study tree roots in pine forests and poplar plantations

2008 ◽  
Vol 35 (10) ◽  
pp. 1047 ◽  
Author(s):  
Terenzio Zenone ◽  
Gianfranco Morelli ◽  
Maurizio Teobaldelli ◽  
Federico Fischanger ◽  
Marco Matteucci ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Ground Penetrating Radar ◽  
Electrical Resistivity Tomography ◽  
Water Saturation ◽  
Three Dimensional ◽  
Tree Roots ◽  
Resistivity Tomography ◽  
Shape Distribution ◽  
Geophysical Surveys ◽  
Ground Penetrating

In this study, we assess the possibility of using ground penetrating radar (GPR) and electrical resistivity tomography (ERT) as indirect non-destructive techniques for root detection. Two experimental sites were investigated: a poplar plantation [mean height of plants 25.7 m, diameter at breast height (dbh) 33 cm] and a pinewood forest mainly composed of Pinus pinea L. and Pinus pinaster Ait. (mean height 17 m, dbh 29 cm). GPR measures were taken using antennas of 900 and 1500 MHz applied in square and circular grids. ERT was previously tested along 2-D lines, compared with GPR sections and direct observation of the roots, and then using a complete 3-D acquisition technique. Three-dimensional reconstructions using grids of electrodes centred and evenly spaced around the tree were used in all cases (poplar and pine), and repeated in different periods in the pine forest (April, June and September) to investigate the influence of water saturation on the results obtainable. The investigated roots systems were entirely excavated using AIR-SPADE Series 2000. In order to acquire morphological information on the root system, to be compared with the GPR and ERT, poplar and pine roots were scanned using a portable on ground scanning LIDAR. In test sections analysed around the poplar trees, GPR with a high frequency antenna proved to be able to detect roots with very small diameters and different angles, with the geometry of survey lines ruling the intensity of individual reflectors. The comparison between 3-D images of the extracted roots obtained with a laser scan data point cloud and the GPR profile proved the potential of high density 3-D GPR in mapping the entire system in unsaturated soil, with a preference for sandy and silty terrain, with problems arising when clay is predominant. Clutter produced by gravel and pebbles, mixed with the presence of roots, can also be sources of noise for the GPR signals. The work performed on the pine trees shows that the shape, distribution and volume of roots system, can be coupled to the 3-D electrical resistivity variation of the soil model map. Geophysical surveys can be a useful approach to root investigation in describing both the shape and behaviour of the roots in the subsoil.

scholarly journals Multidisciplinary Approach to a Recovery Plan of Historical Buildings

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
Luciana Orlando
Keyword(s):  
Electrical Resistivity ◽  
Seismic Data ◽  
Electrical Resistivity Tomography ◽  
Multidisciplinary Approach ◽  
Seismic Refraction ◽  
Lateral Velocity ◽  
Resistivity Tomography ◽  
Multiple Data ◽  
Geophysical Surveys ◽  
Joint Interpretation

The paper emphasizes the advantages of employing multiple data techniques—geology, GPS, surveys of cracking, boreholes, seismic refraction and electrical resistivity tomography—to image the shallow stratigraphy and hypothesize the cause of instability of an urban area. The study is focused on the joint interpretation of the crack pattern, topographic monitoring and the features of the underground, to define the area affected by instability and the direction of ground motion with the objective to advance a hypothesis on the cause of the instability of the area and to depict the main features. Borehole stratigraphies for a univocal interpretation of the lithology of electrical and seismic data and electrical resistivity tomography to constrain the interpretation of the lateral velocity variations and thickness of seismic bedrock were used. The geophysical surveys reveals to be complementary in the depicting of underground features. The study is approached at small and medium scale.

scholarly journals Electrical Resistivity Tomography Techniques for Identifying Groundwater Pollution Due To Leachate flows at Putri Cempo Landfill

2017 ◽  
Vol 1 ◽  
pp. 103-109
Author(s):  
Harjito Harjito ◽  
Suntoro Suntoro ◽  
Totok Gunawan ◽  
M. Maskuri
Keyword(s):  
Electrical Resistivity ◽  
Groundwater Pollution ◽  
Land Surface ◽  
Electrical Resistivity Tomography ◽  
Subsurface Layer ◽  
Quality Analysis ◽  
Leachate Treatment ◽  
Resistivity Tomography ◽  
Leachate Management ◽  
Surrounding Areas

Landfill developed with open dumping system and below the adequate standard potentially lead to new problems like those found at Putri Cempo Landfill in Surakarta City. They include leachate, which easily flows in runoff, seeps through soil and land surface, and infiltrate into groundwater that supplies the surrounding residential wells. A research on leachate spread pattern from landfills to their surrounding areas thereby becomes necessary particularly in terms of environmental pollution potential from underground, which is latent and difficult to monitor. The aims of this research were (1) to identify the areas that experienced groundwater pollution due to leachate flows, (2) to identify the distribution of resistivity in these areas, and (3) to develop a model for leachate management. This research used Electrical Resistivity Tomography (ERT) survey for identifying the distribution of resistivity in polluted areas. It also used groundwater quality analysis for validating the interpretation of the ERT survey results. The results of the research showed that there was an anomaly in the subsurface layer. Materials with resistivity values of 0.25-1.20 ohmm were found in various depths within 0-8 m below the surface. These values were much lower than the resistivity of the main materials found at the measurement site, i.e. 4.9-13.1 ohmm. Accordingly, this anomaly signified the existing influence of pollution. The pollution along the geoelectrical sounding line had uneven distribution and centric pattern at several points that indicated the accumulation sites of leachate. The proposed leachate management model included the constructions of base lining (liner), leachate collection channel, geomembrane-composed final cap, and leachate treatment.

scholarly journals Geophysical exploration of castle remains in Barwałd Górny (near Kalwaria Zebrzydowska, Poland) using electrical resistivity tomography (ERT) with assistance of depth of investigation index (DOI) method

2014 ◽  
Vol 3 (1) ◽  
pp. 24-31
Author(s):  
Michał Glazer ◽  
Damian Kula ◽  
Robert Saternus ◽  
Paweł Lewicki
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
14Th Century ◽  
Geophysical Exploration ◽  
Geophysical Surveys ◽  
Tomography Method ◽  
Depth Of Investigation

Abstract In March of 2014 at ruins of the 14th century castle, situated at the top of Mount Żar in Małopolska region, Poland, geophysical surveys were performed. Surveys were planned to investigate remains of the castle that could remain in the ground. Electrical Resistivity Tomography method was used there. In the paper 4 sections have been presented. During interpretation, as the supporting method, maps of Depth-of-Investigation (DOI) index have been used. Results of the surveys can point out potential remains of the castle walls and ruins of buildings that were situated in the stronghold

scholarly journals IMAGING TREE ROOT ZONE GEOMETRY USING ELECTRICAL RESISTIVITY TOMOGRAPHY

2020 ◽  
Vol 30 (1) ◽  
pp. 55
Author(s):  
Asep Mulyono ◽  
Ilham Arisbaya ◽  
Yayat Sudrajat
Keyword(s):  
Electrical Resistivity ◽  
Cross Sections ◽  
Electrical Resistivity Tomography ◽  
Root Zone ◽  
Geophysical Methods ◽  
Three Dimensional ◽  
Soil Surface ◽  
Resistivity Tomography ◽  
Root Plate ◽  
Maesopsis Eminii

Root zone geometry research is usually done in a conventional way which is destructive, time-consuming, and requires a considerable cost. Several non-destructive measurements used geophysical methods have been developed, one of which is the Electrical Resistivity Tomography (ERT) method. Tree root zone determination using ERT has been carried out in Kiara Payung area, Sumedang, West Java, with Maesopsis eminii tree as the object study. A total of 29 ERT lines were measured using dipoledipole configuration with electrodes spacing of 50 cm. The results of two-dimensional (2D) and three-dimensional (3D) inversion modeling show that the ERT method has been successfully imaging the tree root zone. The root zone is characterized as 100-700 Ωm with an elliptical shape geometry of the root plate. The root radius is estimated to be 4-5 m from the stem, the root zone diameter reaches 8-9 m at the shallow soil surface and the root zone depth is approximately 2-2.5 m. ABSTRAK Pencitraan geometri zona perakaran pohon menggunakan electrical resistivity tomography. Penelitian geometri zona perakaran biasa dilakukan dengan cara konvensional yang destruktif, memakan waktu, dan membutuhkan biaya yang tidak sedikit. Beberapa pengukuran non-destruktif menggunakan metode geofisika telah dikembangkan, salah satunya adalah metode Electrical Resistivity Tomography (ERT). Penentuan zona perakaran pohon menggunakan metode ERT telah dilakukan di daerah Kiara Payung, Sumedang, Jawa Barat, dengan pohon Maesopsis eminii sebagai objek studi. Sebanyak 29 lintasan ERT diukur menggunakan konfigurasi dipole-dipole pada dengan jarak antar elektroda 50 cm. Hasil pemodelan inversi dua dimensi (2D) dan tiga dimensi (3D) menunjukkan bahwa metode ERT telah berhasil mencitrakan zona perakaran pohon. Zona perakaran teridentifikasi berada pada nilai resistivitas 100-700 Ωm dengan root plate dan root cross-sections berbentuk elips. Radius akar diperkirakan sejauh 4-5 m dari pangkal batang, sedangkan diameter zona perakaran mencapai sekitar 8-9 m di permukaan tanah dangkal dan kedalaman zona perakaran diperkirakan antara ~2-2.5 m. 

scholarly journals Geophysical Survey of the Hillfort Staré Zámky near Brno-Líšeň, Czech Republic

2020 ◽  
Vol XI (2) ◽  
pp. 183-195
Author(s):  
Peter Milo ◽  
◽  
Tomáš Tencer ◽  
Michal Vágner ◽  
Michaela Prišťáková ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Czech Republic ◽  
Large Scale ◽  
Electrical Resistivity Tomography ◽  
Magnetic Survey ◽  
Archaeological Research ◽  
Structural Elements ◽  
Geophysical Research ◽  
Resistivity Tomography ◽  
Geophysical Surveys

The aim of this paper is to present the results of geophysical surveys at the Staré zámky site near Brno-Líšeň, which were carried out in 2019. Electrical resistivity tomography, georadar survey and large-scale magnetic prospection were all carried out there. The primary task of the first two methods was to investigate the inner structure of the still-existing ramparts and to identify their individual structural elements. The magnetic survey focused on the identification of areas where potential archaeological features can be found – together with the identification of previously-unknown fortifications. The surveys were successful: we have found numerous settlement features from different phases of settlement, an early medieval cemetery and fortifications of various types, sizes and state of preservation. The results of previous archaeological research of the site played an important role for interpretation of the geophysical data. Together these results provide important insights into the study of the complex fortified settlement of Staré zámky. Despite our results, some questions which cannot be answered by geophysical research alone remain unanswered.

scholarly journals APPLICATION OF ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) FOR SLOPE FAILURE INVESTIGATION: A CASE STUDY FROM KUALA LUMPUR

2018 ◽  
Vol 80 (5) ◽  
Author(s):  
Nurul Iffah Ismail ◽  
Wan Zuhairi Wan Yaacob
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Slope Failure ◽  
Engineering Properties ◽  
Kuala Lumpur ◽  
Resistivity Tomography ◽  
Electrical Resistivity Survey ◽  
Resistivity Survey ◽  
Soil Hardness ◽  
Geophysical Surveys

Electrical Resistivity Tomography (ERT) is a commonly used tool in near surface geophysical surveys to investigate numerous geological, environmental, and engineering problems including landslides. In this study, an electrical resistivity survey was conducted at a landslide area, located in Bukit Setiawangsa, Kuala Lumpur, Malaysia. On 29th December 2012, a luxury hilltop bungalow was split into two when a 43m retaining wall was collapsed after a continuous heavy downpour. 2-D electrical resistivity survey have been acquired along two (2) profiles on the adjacent slope in an effort to mitigate the risks of instability, especially during the rectification work of the failed slope using a Schlumberger Array. It produced useful information about the geometry and characteristics of the study area. In addition, the 2-D resistivity method was performed to determine the behaviour of electrical resistivity underlying the slope areas and estimate the location of the failure surface. Four (4) boreholes were also drilled to obtain engineering properties of the study area such as soil classification, moisture content, soil hardness and SPT N-value.  In order to develop the relationship between resistivity and engineering properties, a comparison between soil hardness and the resistivity value was made. Results from the ERT indicated the presence of zones with low resistivity values identified as percolated water in permeable loose soil, which was believed to be the potential slip surface. The findings of this study also showed that the electrical resistivity imaging coupled with borehole drillings were useful tools for the characterisation of slope failure via subsurface profiles and engineering properties of soil.

scholarly journals GEOPHYSICAL SURVEYS AT THE CALM R53 SITE

2021 ◽  
Vol 2 (3) ◽  
pp. 69-74
Author(s):  
Alexandr N. Shein ◽  
Yaroslav K. Kamnev
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
Geophysical Surveys ◽  
Ground Penetrating

The paper presents geophysical surveys at the CALM R53 site, where since 2016 standard measurements with a permafrost rod, electrical resistivity tomography and ground-penetrating measurementshave been carried out. The assessment of the capabilities of geo-radar and the ET method in the landscape conditions presented at the site was carried out.

Results of Geophysical Research at the Ust`-Biyke-I Site (in the Altai)

2021 ◽  
Vol 33 (1) ◽  
pp. 73-84
Author(s):  
Olenchenko V. ◽  
◽  
Shnaider S. ◽  
Osipova P. ◽  
Kalganov A. ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Bronze Age ◽  
Electrical Resistivity Tomography ◽  
Ground Surface ◽  
Basic Research ◽  
Archaeological Site ◽  
Anthropogenic Activity ◽  
Geophysical Research ◽  
Resistivity Tomography ◽  
Geophysical Surveys

Abstract: Ust’-Biyke-I may become one of the most important archaeological complexes in the northern Altai region. Previous research established that the site was first occupied in the developed Mesolithic. Traces of subsequent occupations up to the Bronze Age were later discovered, in addition to burial structures. A loss of archaeological deposits at the mouth of the Biyke River occurred due to natural and anthropogenic activity. In order to identify the most promising areas for future excavations, geophysical surveys of the site were conducted. An area of 31.5 x 24 m was examined with electrical resistivity tomography (ERT) and ground-penetrating radar (GPR). Results revealed an object with a diameter of about 4 m that was not visible on the ground surface. In its center at a depth of 1.5 m, a local anomaly was observed. Another isometric anomaly was observed in the southwestern part at a depth of 0.75 m. Other anomalies were also noted in the surveyed area, some of which are visible in the modern terrain as small depressions. Future excavations will clarify the geophysical survey. Keywords: Altai, archaeological site, geophysical research, electrical resistivity tomography, groundpenetrating radar, settlement Acknowledgements: Geophysical study at the site was conducted with the financial support of the Russian Foundation for Basic Research (Project № 17–29–04122), archaeological work was carried out at the expense of the project NGS-67706R-20.

Sign in / Sign up

Export Citation Format

Share Document