Modeling Frequency Dependences of Surface Impedance on Geoelectrical Structure of Frozen Ground in Range 1-10 8 Hz
Abstract The results of numerical modeling of frequency dependence of permafrost surface impedance in a band of 1 Hz to 100 MHz are shown for typical geoelectric sections (GESs) of Central Yakutia. Particular qualities of frequency dependence are represented by oscillation values in a wide frequency...
| Published in: | IOP Conference Series: Earth and Environmental Science |
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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IOP Publishing
2020
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| Online Access: | http://dx.doi.org/10.1088/1755-1315/459/5/052085 https://iopscience.iop.org/article/10.1088/1755-1315/459/5/052085/pdf https://iopscience.iop.org/article/10.1088/1755-1315/459/5/052085 |
| Summary: | Abstract The results of numerical modeling of frequency dependence of permafrost surface impedance in a band of 1 Hz to 100 MHz are shown for typical geoelectric sections (GESs) of Central Yakutia. Particular qualities of frequency dependence are represented by oscillation values in a wide frequency band. The role the displacement and conduction currents in permafrost for the given range of frequencies play is marked. Two main bilayer models of permafrost are discussed: weak-inductive and strong-inductive models. Additional three-six layer models are considered along with indication of their particular qualities and conformity with natural sections. The influence of effect of thin conductive layer in permafrost is shown by sites long half-period occurrence of oscillation of impedance’ module and argument values, caused by displacement currents predominance in the horizon of frozen mellow sediments and by conduction currents outweighing in the underlying horizonю One marks the significance the phase curves when used for determination of GES type under condition of approximate automatic interpretation of radio impedance and RMT methods data. |
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