scholarly journals Use of electric resistivity tomography (ERT) for detecting underground voids on highly anthropized urban construction sites

2017 ◽  
Vol 209 ◽  
pp. 202-209 ◽  
Author(s):  
Constantin Ungureanu ◽  
Adrian Priceputu ◽  
Adrian Liviu Bugea ◽  
Anton Chirică
Keyword(s):  
Electric Resistivity ◽  
Construction Sites ◽  
Resistivity Tomography ◽  
Urban Construction

scholarly journals Special 3D electric resistivity tomography (ERT) array applied to detect buried fractures on urban areas: San Antonio Tecómitl, Milpa Alta, México

2014 ◽  
Vol 53 (4) ◽  
pp. 425-434 ◽  
Author(s):  
René E. Chávez ◽  
Gerardo Cifuentes-Nava ◽  
J. Esteban Hernández-Quintero ◽  
Diana Vargas ◽  
Andrés Tejero
Keyword(s):  
Urban Areas ◽  
San Antonio ◽  
Electric Resistivity ◽  
Resistivity Tomography

Time lapse electric resistivity tomography to portray infiltration and hydrologic flow paths from surface to cave

2021 ◽  
Vol 593 ◽  
pp. 125810
Author(s):  
Matthias Leopold ◽  
Conrad Gupanis-Broadway ◽  
Andy Baker ◽  
Stuart Hankin ◽  
Pauline Treble
Keyword(s):  
Time Lapse ◽  
Electric Resistivity ◽  
Flow Paths ◽  
Resistivity Tomography

scholarly journals Application of electric resistivity tomography for investigation of geological situation closed to railways

2019 ◽  
Vol 265 ◽  
pp. 03005
Author(s):  
Dmitriy Gorbach ◽  
Valeriya Yakimenko ◽  
Olga Konovalova
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Electric Resistivity ◽  
Practical Work ◽  
Surface Zone ◽  
Two Dimensional ◽  
Resistivity Tomography ◽  
Near Surface ◽  
Geological Situation ◽  
Engineering Geophysics

The paper reviews methods of engineering geophysics which can be applied to sections of railway tracks. The method of electrical resistivity tomography is used to study the properties of the geological situation under an engineering structure. In the course of practical work, two-dimensional geoelectric sections were obtained. Interpretation of the sections allowed to understand the structure of the near-surface zone.

Electric resistivity tomography shows radial variation of electrolytes in Quercus robur

2010 ◽  
Vol 40 (6) ◽  
pp. 1189-1193 ◽  
Author(s):  
Dirk Bieker ◽  
Steffen Rust
Keyword(s):  
Moisture Content ◽  
Cross Section ◽  
Cross Sections ◽  
Quercus Robur ◽  
Distinct Pattern ◽  
Electric Resistivity ◽  
Wood Moisture Content ◽  
Wood Moisture ◽  
Resistivity Tomography ◽  
English Oak

Electric resistivity tomograms of English oak ( Quercus robur L.) show a very distinct pattern of electric resistivity that has not been found in any other tree species yet and that cannot be related to the distribution of wood moisture content over the stem cross section. To reveal the factors underlying this two-dimensional pattern of electric resistivity, the variation of specific gravity and wood moisture content was analyzed in 18 cross sections of six roadside English oak trees after electric resistivity tomography. pH and electrolyte content were analyzed in two representative cross sections. Results show that electric resistivity correlates neither with wood moisture content nor density. The steep increase in electric resistivity at the sapwood–heartwood boundary correlates well with decreasing pH, potassium, and magnesium. The decreasing electric resistivity within the heartwood of English oak correlates with potassium and magnesium, increasing from the sapwood–heartwood boundary to the pith. More research is needed to identify species-specific electric resistivity patterns and their main factors if the method is to be used to detect wood fungal decay, historical ground water contamination, or other influences that may change the pattern of electric resistivity in the stem cross section.

scholarly journals A shallow geothermal experiment in a sandy aquifer monitored using electric resistivity tomography

Geophysics ◽  
2012 ◽  
Vol 77 (1) ◽  
pp. B11-B21 ◽  
Author(s):  
Thomas Hermans ◽  
Alexander Vandenbohede ◽  
Luc Lebbe ◽  
Frédéric Nguyen
Keyword(s):  
Transport Model ◽  
Groundwater Resources ◽  
Time Lapse ◽  
Electric Resistivity ◽  
Geothermal Systems ◽  
Resistivity Tomography ◽  
Temperature Changes ◽  
Practical Applications ◽  
Heated Water ◽  
Sandy Aquifer

Groundwater resources are increasingly used around the world for geothermal exploitation systems. To monitor such systems and to estimate their governing parameters, we rely mainly on borehole observations of the temperature field at a few locations. Bulk electric resistivity variations can bring important information on temperature changes in aquifers. We have used surface electric resistivity tomography to monitor spatially temperature variations in a sandy aquifer during a thermal injection test. Heated water (48°C) was injected for 70 hours at the rate of [Formula: see text] in a 10.5°C aquifer. Temperature changes derived from time-lapse electric images were in agreement with laboratory water electric conductivity-temperature measurements. In parallel, a coupled hydrogeologic saturated flow and heat transport model was calibrated on geophysical data for the conceptual model, and on hydrogeologic and temperature data for the parameters. The resistivity images showed an upper flow of heated water along the well above the injection screens and led to a new conceptualization of the hydrogeologic source term. The comparison between the temperature models derived from resistivity images and from the simulations was satisfactory. Quantitatively, resistivity changes allowed estimating temperature changes within the aquifer, and qualitatively, the heated plume evolution was successfully monitored. This work demonstrates the ability of electric resistivity tomography to study heat and storage experiments in shallow aquifers. These results could potentially lead to a number of practical applications, such as the monitoring or the design of shallow geothermal systems.

Karst and saltwater intrusion mapping using electric resistivity tomography: case study at the site of Cap Rhir, Southern Morocco

2008 ◽  
Vol 6 (5) ◽  
pp. 321-329 ◽  
Author(s):  
El Arbi Toto ◽  
Mohamed El Basri ◽  
Saif Ali Al-Hajari ◽  
Mohamad Hafid ◽  
Mohamed Benammi ◽  
...  
Keyword(s):  
Saltwater Intrusion ◽  
Electric Resistivity ◽  
Resistivity Tomography

L‐ andCORNER‐arrays for 3D electric resistivity tomography: an alternative for geophysical surveys in urban zones

2015 ◽  
Vol 13 (4) ◽  
pp. 355-368 ◽  
Author(s):  
Andrés Tejero‐Andrade ◽  
Gerardo Cifuentes ◽  
René E. Chávez ◽  
Aideé E. López‐González ◽  
Cecilia Delgado‐Solórzano
Keyword(s):  
Electric Resistivity ◽  
Resistivity Tomography ◽  
Geophysical Surveys
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