Earth`s Cryosphere, 2019, Vol. XXIII, № 3, p. 51-57
REVEALING POTENTIAL THERMO-SUFFOSIONAL SOIL LOOSENING SITES ALONG A-360 LENA FEDERAL HIGHWAY, CENTRAL YAKUTIA
L.A. Gagarin1,2, K.I. Bazhin1, V.V. Olenchenko3, V.V. Ogonerov1, Wu Qingbai2
1Melnikov Permafrost Institute, SB RAS, 36, Merzlotnaya str., Yakutsk, 677010, Russia; gagarinla@gmail.com
2Institute of Eco-Environment and Resources, GAS, State Key Laboratory of Frozen Soil Engineering Northwest,
326, W. Donggang rd., Lanzhou, 730000, China
3Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS, 3, Acad. Koptyuga ave., Novosibirsk, 630090, Russia
The article presents results of the studies of thermo-suffosion processes development in the period from 2008 through 2017. Electrical resistivity tomography survey revealed highly dynamic geocryological and hydrogeological conditions at the Ulakhan-Taryn groundwater spring, Central Yakutia. It has been established that the permafrost thickness degraded by 4 m in a 4-year period above the intrapermafrost ground water due to heat effects. As many as five sites of thermo-suffosional soil loosening and potential cover-collapse development were identified along the Lena Federal Highway.
Thermo-suffosion, intrapermafrost waters, suprapermafrost waters, talik, permafrost, electrical resistivity tomography