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The GPR-based estimation of the volumetric ice content of dispersed ground in the Central Yakut lowland
https://doi.org/10.15356/2076-6734-2019-1-81-92
Abstract
The previously unknown dependence between the volume ice content of frozen dispersed soils and their radiophysical properties (the speed of propagation and specific attenuation of the amplitude of electromagnetic waves) was studied in the layer of annual heat flows of Central Yakutia. The correlation between these characteristics determined in the laboratory and the method of discrete georadiolocation is established. The peculiarity of the connection is the sharp decline in the sensitivity of the propagation speed and the specific attenuation of electromagnetic waves in frozen dispersed soils with high volume ice content (more than 60%). In general, the specific attenuation of electromagnetic waves is more responsive to the change in the volume of ice content of frozen dispersed soils and, thus, it is more preferable to solve the problem of quantitative evaluation of this characteristic. The proposed method of reusable measurements of signals of georadiolocation with changing position and azimuth of antennas of georadars in the vicinity of the network points of geological and geophysical observations allows to estimate the average values of the propagation speed and specific attenuation of electromagnetic waves with an error of not more than 10%. Due to this, according to the equations of logistic functions it is possible to calculate the average values of volume ice content with an error of 7–11%. With this error, the picture of the probability distribution according to the georadiolocation values of the volume ice content in the averages is completely identical to the laboratory data. On this basis, the found regression equations are recommended to be used for the calculation of the speed of propagation and specific attenuation of electromagnetic waves of background or average values of the volume ice content of frozen dispersed soils of the annual heat transfer layer in any part of the ice complex of the Central Yakut lowland.
About the Author
L. G. NeradovskyRussian Federation
References
1. Soloviev P.A. Kriolitozona severnoy chasti Leno-Amginskogo mezhdurech'ya. Permafrost in the Northern Part of the Lena-Amga Watershed. Moscow: Izd-vo AN SSSR, 1959: 144 p. [In Russian].
2. GOST 25100-2011. Grunty. Klassifikatsiya. Soils. Classification. Moscow: RF National Standard, 2010: 56 p. [In Russian].
3. Votyakov I.N. Fiziko-mekhanicheskie svoystva myorzlykh i ottaivayushchikh gruntov Yakutii. Physical and mechanical properties of frozen and thawing soils in Yakutia. Novosibirsk: Nauka, 1975: 175 p. [In Russian].
4. Kalinin V.M., Yakupov V.S. Regional'nye zakonomernosti povedeniya moshchnosti myorzlykh tolshch. Regional patterns of permafrost thickness behavior. Yakutsk, Yakutsk Scientific Center, Siberian Branch of the USSR Academy of Science, 1989: 144 p. [In Russian].
5. Skryabin P.N., Varlamov S.P., Skachkov Yu.B. Mezhgodovaya izmenchivost' teplovogo rezhima gruntov rayona Yakutska. Interannual variability of the ground thermal regime in the Yakutsk area. Novosibirsk: Siberian Branch of the USSR Academy of Science, 1998: 144 p. [In Russian].
6. Kulaichev A.P. Metody i sredstva kompleksnogo analiza dannykh. Methods and tools for integrated data analysis. Moscow: FORUM, INFRA‑M Publ., 2006: 512 p. [In Russian].
7. GOST 5180-84. Grunty. Metody laboratornogo opredeleniya fizicheskikh kharakteristik. Izdanie ofitsial'noe. Gosudarstvennyi komitet SSSR po delam stroitel'stva. GOST 5180-84. Soils. Laboratory methods for determining the physical characteristics. Official publication. USSR State Committee for Construction. Moscow: Standards Publishing House, 1985: 18 p. [In Russian].
8. Omel'yanenko A.V. Georadiolokatsiya myorzlykh rykhlykh otlozheniy. Ground probing radar for study of frozen deposits. РhD. Moscow: MSU, 1989: 194 p. [In Russian].
9. Patent 2490671 RU. Patent 2490671 RU, MPK G01V 3/12, G01S1 3/88. Method for ground penetrating radar study of permafrost materials. L.G. Neradovskii; appl. L.G. Neradovskii. 2011125238/28; appl. 17.06.2011; publ. 20.08.2013, Bull. 23: 11 p. [In Russian].
10. Neradovskiy L.G. Metodicheskoe rukovodstvo po izucheniyu mnogoletnemyorzlykh porod metodom dinamicheskoy georadiolokatsii. Guidelines for permafrost investigation by dynamic GPR method. Moscow: Russian Academy of Sciences Press, 2009: 337 p. [In Russian].
11. Suhanov L.A. Measurements of mountain glacier thickness using the GPR method. Materialy glyatsiologicheskikh issledovaniy. Data of Glaciological Studies. 1973, 22 (2): 58–64. [In Russian].
12. Bogorodskiy V.V. Radiozondirovanie l'da. Radio sounding of ice. Leningrad: Gidrometeoizdat, 1975: 63 p. [In Russian].
13. Vladov M.L., Sudakova M.S. Georadiolokatsiya. Ot fizicheskikh osnov do perspektivnykh napravleniy. Ground probing radar. From physical principles to promising directions. Moscow: GEOS Publ., 2017: 240 p. [In Russian].
14. Kudryavtsev V.A., Garagulya L.S., Kondratieva K.A., Romanovskiy N.N., Maksimova A.N., Chizhov A.B. Metodika merzlotnoy s’emki. Methods of permafrost survey. Moscow: MSU Press, 1979: 358 p. [In Russian].
Supplementary files
For citation: Neradovsky L.G. The GPR-based estimation of the volumetric ice content of dispersed ground in the Central Yakut lowland. Ice and Snow. 2019;59(1):81-92. https://doi.org/10.15356/2076-6734-2019-1-81-92
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