APPLICATION OF GROUND-PENETRATING RADAR FOR GEOCRYOLOGICAL MONITORING OF A SITE IN THE PECHORA RIVER FLOODPLAIN IN 2018-2024
M.S. Sudakova1,2,3, M.R. Sadurtdinov1, S.Yu. Davydenko1,2, G.V. Malkova1, A.M. Tsarev1, A.G. Skvortsov1
1Tyumen Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Earth Cryosphere Institute, Tyumen, Russia
2Lomonosov Moscow State University, Faculty of Geology, Moscow, Russia
3HSE University, Moscow, Russia
Keywords: permafrost, GPR, permafrost monitoring, permafrost degradation, sporadic high-temperature permafrost, CALM, groundwater level, climate change
Abstract
The results of six years (2018-2024) of geocryological monitoring at the CALM R24A-2 site (Kumzha) in the Pechora River Delta are presented. The study is based on the integrated application of ground-penetrating radar (GPR) with different offsets: zero-offset profiling with a 300 MHz antenna for boundary tracing and multi-offset sounding with a 150 MHz antenna for precise velocity determination. It was found that the average depth of permafrost table increased by (1.3 ± 0.2) m, which corresponds to a trend of 20 cm/year. A set of different offset GPR techniques has demonstrated its effectiveness as a non-destructive method of geocryological monitoring. The obtained data provide the basis for verifying and improving predictive models of permafrost development, which is crucial for planning sustainable nature management and minimizing damage from permafrost degradation.
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