Известия Томского политехнического университета: Инжиниринг георесурсов (Nov 2022)

APPLYING GROUND GEOPHYSICAL PROSPECTING USING THE METHOD OF ELECTRICAL RESISTIVITY TOMOGRAPHY AS PART OF ENGINEERING AND GEOLOGICAL SURVEYS OF A FLOODED AREA IN ONE OF THE RESIDENTIAL AREAS OF IRKUTSK

  • Mikhail S. Shkiria,
  • Yuri K. Lankin,
  • Stanislav A. Tereshkin,
  • Anton V. Lazurchenko,
  • Yuri A. Davydenko

DOI
https://doi.org/10.18799/24131830/2022/11/3766
Journal volume & issue
Vol. 333, no. 11
pp. 160 – 170

Abstract

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The relevance of the study is caused by the necessity to assess the problem of flooding of one of the residential areas in Irkutsk, Irkutsk region. The flooding of urban areas is mostly seasonal. Identifying the conditions of aquicludes and well-permeable rocks, as well as, determining areas of possible groundwater accumulation using the method of electrical resistivity tomography makes it possible to develop measures to eliminate the damage caused by flooding. The objective. The work was carried out using the method of electrical resistivity tomography to assess the geological and hydrogeological conditions for flooding development, which has negative impact on residential development. Objects: bedrock monoliths characterized by high electrical resistance and being practically aquicludes; permeable zones on the land surface, which provide precipitation filtration and ground-water supply through them; areas, where the formation of vadose waters that cause the development of groundwater flooding is possible. Methods: ground geophysical prospecting using the method of electrical resistivity tomography; two- dimensional and three-dimensional inversion of electrical resistivity tomography data and its interpretation with regard to geotechnical drilling data. As a result of ground geophysical prospecting, it was established that the slope on which the assessed territory is located is an ancient landslide cirque, where the natural state of the rock mass is disturbed. Geophysical prospecting has revealed well-permeable zones on the land surface, which provide precipitation filtration and ground-water supply through them. According to electrical resistivity tomography, subzones were identified: severe flooding with groundwater level close to the land surface; moderate flooding with a groundwater level depth of 0,3 to 2 meters and weak flooding with a groundwater level depth of 2,0 to 5,0 meters.

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