Assessment of Landslide by Its Fracture System using Electric Resistivity Tomography and Pressure Probe Method | Chapter 4 | Current Advances in Geography, Environment and Earth Sciences Vol. 4

 The goal of this chapter was to investigate a slow-moving loess landslide in South Hungary. Unlike earlier efforts, we were able to pinpoint its fracture system. It appears to be the only option to learn about the landslide's structure and subsequent evolution due to the uniform nature of the loess. In addition to the well-known Electrical Resistivity Tomography, the Pressure Probe (PreP) method was utilised to analyse the apparently thick fracture structure (ERT). This approach was developed to discover and analyse mechanically weak zones that are not visible on the surface, such as those caused by landslides. The ERT has been very successful in locating fracture zones. allowing for the prediction of future rupture surfaces and, as a result, the designation of dangerous zones Both methodologies were successful in determining the location of a landslide's fracture system. The mass shifts that occurred around a year and a half after the observations supported geophysical predictions. For giving early danger alarms and averting damage to structures or compromising human life, the employment of the ERT and PreP techniques is strongly advised.

Author(s) Details:

K. Szokoli,
Institute of Earth Physics and Space Science, H-9401 Sopron POB 5, Hungary.

L. Szarka,
Institute of Earth Physics and Space Science, H-9401 Sopron POB 5, Hungary.

M. Metwaly,
Archaeology Department, College of Tourism and Archaeology, King Saud University, Saudi Arabia and National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt.

J. Kalmar,
Institute of Earth Physics and Space Science, H-9401 Sopron POB 5, Hungary.

E. Pracser,
Institute of Earth Physics and Space Science, H-9401 Sopron POB 5, Hungary.

M. K. Baracza,
Research Institute of Applied Earth Sciences, University of Miskolc, Hungary.

P. Szucs,
University of Miskolc, Institute of Environmental Management, Hungary and MTA-ME Geoengineering Research Group, Miskolc, Hungary.

S. Szalai,
Institute of Earth Physics and Space Science, H-9401 Sopron POB 5, Hungary.

Please see the link here: https://stm.bookpi.org/CAGEES-4/article/view/7115

Studies on Multiplication of the Depth of Detectability Using y 11n Arrays | Chapter 8 | International Research in Environment, Geography and Earth Science Vol. 6

 A basic parameter of all geophysical methods, including geoelectrics, is the depth of investigation (DI). A critical parameter in geophysical exploration has always been the depth from which knowledge can be accessed. This paper deals with the detectability depth (DD) of configurations of 2D electric resistivity tomography. In the presence of a given noise level, DD is the maximum depth from which a given model body is observable. This paper shows that there is a nearly linear relationship between the maximum value of their parameter-sensitivity (PS) maps and their DD values, based on previous DD measurements for traditional electrode arrays. We found that many of them have higher PSmax values than those of traditional arrays when analysing the PS maps of other arrays, as well. Therefore, these so-called γ arrays are supposed to also have larger DD values. This expectation has been verified by the executed DD calculations. Linear geoelectric arrays, where γ refers to the CPCP, are γ arrays Arrays have consistently generated higher DD values than the best traditional arrays if n is greater or equal to 2. The DD value of these arrays can be 2-3 times greater than the best value of the conventional array. Such an improvement in the DD value is particularly useful when the measurement space available is reduced, e.g. due to infrastructural conditions. Large-depth anomalies, for example, that are not seen by traditionally used arrays, can be detectable using γ-arrays, as numerical studies have also verified. In addition, these arrays require less measurement than most conventional arrays, which results in shorter measurement time. According to the above observations, the γ ⁇ arrays and particularly the γ ⁇ -, γ ⁇ - and γ ⁇ arrays can be a useful alternative to traditional arrays, especially in sites where the place available for measurements is limited (e.g. built-up areas), because they can provide information from greater depths. Measurements are mor with these arrays more Consuming less time

Author (s) Details

Sándor Szalai
CSFK GGI, H-9401 Sopron POB 5, Hungary and Department of Geophysics, University of Miskolc, H-3515 Miskolc-Egyetemváros, Hungary.

Dr. Mátyás Krisztián Baracza
Research Institute of Applied Earth Sciences, University of Miskolc, H-3515 Miskolc-Egyetemváros, Hungary.

István Lemperger
CSFK GGI, H-9401 Sopron POB 5, Hungary.

Mohamed Metwaly
Archaeology Department, College of Tourism and Archaeology, King Saud University, Saudi Arabia and National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt.

Árpád Kis
CSFK GGI, H-9401 Sopron POB 5, Hungary.

Attila Novák
CSFK GGI, H-9401 Sopron POB 5, Hungary.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/283

Studies on Multiplication of the Depth of Detectability Using y 11n Arrays | Chapter 8 | International Research in Environment, Geography and Earth Science Vol. 6

 

A basic parameter of all geophysical methods, including geoelectrics, is the depth of investigation (DI). A critical parameter in geophysical exploration has always been the depth from which knowledge can be accessed. This paper deals with the detectability depth (DD) of configurations of 2D electric resistivity tomography. In the presence of a given noise level, DD is the maximum depth from which a given model body is observable. This paper shows that there is a nearly linear relationship between the maximum value of their parameter-sensitivity (PS) maps and their DD values, based on previous DD measurements for traditional electrode arrays. We found that many of them have higher PSmax values than those of traditional arrays when analysing the PS maps of other arrays, as well. Therefore, these so-called γ arrays are supposed to also have larger DD values. This expectation has been verified by the executed DD calculations. Linear geoelectric arrays, where γ refers to the CPCP, are γ arrays Arrays have consistently generated higher DD values than the best traditional arrays if n is greater or equal to 2. The DD value of these arrays can be 2-3 times greater than the best value of the conventional array. Such an improvement in the DD value is particularly useful when the measurement space available is reduced, e.g. due to infrastructural conditions. Large-depth anomalies, for example, that are not seen by traditionally used arrays, can be detectable using γ-arrays, as numerical studies have also verified. In addition, these arrays require less measurement than most conventional arrays, which results in shorter measurement time. According to the above observations, the γ ⁇ arrays and particularly the γ ⁇ -, γ ⁇ - and γ ⁇ arrays can be a useful alternative to traditional arrays, especially in sites where the place available for measurements is limited (e.g. built-up areas), because they can provide information from greater depths. Measurements are mor with these arrays more Consuming less time

Author (s) Details

Sándor Szalai
CSFK GGI, H-9401 Sopron POB 5, Hungary and Department of Geophysics, University of Miskolc, H-3515 Miskolc-Egyetemváros, Hungary.

Dr. Mátyás Krisztián Baracza
Research Institute of Applied Earth Sciences, University of Miskolc, H-3515 Miskolc-Egyetemváros, Hungary.

István Lemperger
CSFK GGI, H-9401 Sopron POB 5, Hungary.

Mohamed Metwaly
Archaeology Department, College of Tourism and Archaeology, King Saud University, Saudi Arabia and National Research Institute of Astronomy and Geophysics (NRIAG), Cairo, Egypt.

Árpád Kis
CSFK GGI, H-9401 Sopron POB 5, Hungary.

Attila Novák
CSFK GGI, H-9401 Sopron POB 5, Hungary.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/283