Vladimir N. Efremov,



Numerical modeling,permafrost zone,Central Yakutia,wide frequency band,models’ comparison,


The results of numerical modeling of frequency dependence of permafrost surface impedance in a band of 1 Hz to 1000 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 bias and conduction currents 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. An example of models’ comparison with radio impedance sounding data is given. One marks the significance the phase curves of radio impedance sounding possess when used for determination of GES type under condition of approximate automatic interpretation.


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