Delineating and modelling an underground water conduit by scattered micro-gravity data and electrical resistivity sounding

2010 ◽  
Vol 41 (3) ◽  
pp. 210-218 ◽  
Author(s):  
Vahid E. Ardestani
Keyword(s):  
Electrical Resistivity ◽  
Gravity Data ◽  
Underground Water ◽  
Resistivity Sounding ◽  
Micro Gravity

scholarly journals Electrical resistivity measurements on Ice Stream B, Antarctica

1994 ◽  
Vol 20 ◽  
pp. 129-136
Author(s):  
S. Shabtaie ◽  
C.R. Bentley
Keyword(s):  
Electrical Resistivity ◽  
Theoretical Models ◽  
Electrode Spacing ◽  
High Resistivity ◽  
Resistivity Sounding ◽  
Basal Ice ◽  
A Value ◽  
Ice Stream ◽  
Ice Stream B ◽  
The Antarctic

Electrical resistivity sounding using the four-electrode Schlumberger array was carried out at station UpB on Ice Stream B to an electrode spacing of 3 km. Measured apparent resistivities were compared with theoretical models based on known relations between resistivity, density and temperature. Densities were measured in a pit and two coreholes; temperatures were measured in the upper 200 m of the ice stream and have been calculated for greater depth from an ice-stream temperature model. The resistivity, after correction for density and temperature, increases with depth down to 650-700 m. Below that is a marked decrease over the next 100m or so that we correlate with the Holocene-Wisconsin transition zone. Still deeper there is an orders-of-magnitude increase to a value, in the basal ice, of 30 MΩ m or more. This extremely high resistivity is similar to that reported for temperate glaciers and deep in the Antarctic ice sheet elsewhere. We attribute it to the destruction, by extensive metamorphism, of impurity-conduction paths at two-grain boundaries

scholarly journals Vertical electrical sounding of soils and permafrost of marine terraces of Gronfjord (Svalbard archipelago)

2016 ◽  
Vol 6 (2) ◽  
pp. 210-220 ◽  
Author(s):  
Ivan Alekseev ◽  
Evgeny Abakumov
Keyword(s):  
Electrical Resistivity ◽  
Active Layer ◽  
Field Work ◽  
Morphological Properties ◽  
Soil Morphology ◽  
Significant Information ◽  
Svalbard Archipelago ◽  
Resistivity Sounding ◽  
Marine Terraces ◽  
Profile Distribution

Vertical electrical resistivity sounding (VERS) of soil-permafrost strata has been performed during the field work within the sea terraces of Gronfjord (Svalbard archipelago, West Spitsbergen island). Vertical electrical resistivity sounding of soil-permafrost strata was performed by portable device LandMapper. Then these data have been analyzed via ZondIP software (1d model). Apparent electrical resistivity values on the soil-permafrost strata usually change rapidly. It was established that studied soils with different origin and morphological properties are referred to 2 trunks, 2 orders, 4 types and 7 subtypes. Histic Gleysols, Cryosols, Gleysols and their subtypes have been investigated within the key plots (Grendasselva, Aldegonda rivers and catena on the sea terrace in surroundings of Barentsburg aerodrome). Several trends in profile distribution of electrical resistivity values have been distinguished. The main is connected with monotonous increasing of electrical resistivity values with a depth. Values of apparent electrical resistivity increase rapidly on the border of active layer-permafrost layer. The contrasts in profile distribution of electrical resistivity values are caused mainly by differences in water content, texture class and degree of strata heterogeneity (due to cryogenic processes). The depths of active layer-permafrost boundary have been distinguished using ZondIP software. Regional differences in this indicator may be explained not only by local differences in thermal regime of soil and permafrost layers, but also by different character of anthropogenic influence on key plots. Vertical electrical resistivity sounding method provides significant information for understanding soil electrical properties without any mechanical disturbances of soil cover. The data obtained is clearly coincided with field work data on soil morphology.

Modelling the karst zones in a dam site through micro-gravity data

2008 ◽  
Vol 39 (4) ◽  
pp. 204-209 ◽  
Author(s):  
Vahid E. Ardestani
Keyword(s):  
Gravity Data ◽  
Dam Site ◽  
Micro Gravity

scholarly journals Density muon radiography of La Soufrière of Guadeloupe volcano: comparison with geological, electrical resistivity and gravity data

2012 ◽  
Vol 190 (2) ◽  
pp. 1008-1019 ◽  
Author(s):  
Nolwenn Lesparre ◽  
Dominique Gibert ◽  
Jacques Marteau ◽  
Jean-Christophe Komorowski ◽  
Florence Nicollin ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Gravity Data ◽  
Muon Radiography

scholarly journals Vertical electrical resistivity sounding (VERS) of tundra and forest tundra soils of Yamal region

2017 ◽  
Vol 31 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Ivan Alekseev ◽  
Jakub Kostecki ◽  
Evgeny Abakumov
Keyword(s):  
Electrical Resistivity ◽  
Soil Depth ◽  
Sharp Decrease ◽  
Crystalline Rock ◽  
Tundra Soils ◽  
Crystalline Layer ◽  
Resistivity Sounding ◽  
Forest Tundra ◽  
Different Depths

Abstract The aim of the study was to determine electrical resistivity peculiarities of tundra and forest tundra soils and soil-permafrost layers of the Yamal region. Measurements of electrical resistivity of soil and permafrost strata were performed with a portable device LandMapper (to a depth of 300-500 cm). These measurements allow determination of the values of apparent electrical resistivity of soils and permafrost at different depths and determination of the depths of the permafrost table on each key plot. It was found that there are several trends in vertical distribution of apparent electrical resistivity values. The first trend is a monotonous increase in electrical resistivity values to the depth. It may be explained by the increasing electrical resistivity within the soil depth in relation to the increase in permafrost density. The second trend is a sharp decrease replaced by a gradual increase in electrical resistivity values caused by changing of non-frozen friable debris to frozen massive crystalline rock. These differences were related to the type of landscape: flat lowlands composed of friable grounds underlain by permafrost or friable grounds with permafrost underlain by a rock crystalline layer.

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