Geoinformatika 2017; 1(61) : 72-79 (in Ukrainian)
INVESTIGATION INTO SOIL SUBSIDENCE IN HISTORICAL PART OF KYIV IN THE NATIONAL RESERVE “SOPHIA OF KYIV”
S.V. Shcherbina1, O.I. Bricz’kyj2, V.A. Ilyenko1, I.D. Byelov3, V.V. Ostapenko4, Yu.V. Lisovyi1, O.A. Czubin2, O.P. Dyedov3, P.G. Pigulevskiy1
1Institute of Geophysics, NAS of Ukraine, 32, Palladin Ave., Kyiv, 03680, Ukraine, e-mail: nohup@ukr.net, hgy@yandex.ua, lisovyi@ukr.net
2Institute for Information Recording of Ukraine, NAS of Ukraine, 2, Shpak Str., Kiev, 03113, Ukraine, e-mail: britsky_ai@ukr.net, olan6590@gmail.com
3Kyiv National University of Construction and Architecture, 31, Povitroflotsky Ave., Kiev, 03037, Ukraine, e-mail: vcbk@ukr.net
4National Reserve “Sophia of Kyiv”, 24, Vladimirskaya Str., Kiev, 01001, Ukraine, e-mail: vladimir.v.ostapenko@gmail.com
The purpose of the article is to investigate instances and processes of dangerous soil subsidence by studying temporal variations in micro seismic fluctuations in the area of the National Reserve “Sophia”. The research is based on the registered and analyzed seismic events of different genesis, and the collected records of micro seismic phenomena caused by a soil faults of the Reserve. The research is aimed at developing methods to conduct works, measure temporal micro seismic variations, and analyze the experimental records.
Design/methodology/approach. The study was carried out by recording temporal variations in micro seismic fluctuations. To register micro seismicity, we used a certified seismometer GURALP CMG-40T.
Findings. Based on the readings of the seismometer, we have built maps of maximum, medium, and minimum values of the amplitude and deviation in temporal variations of micro seismic vibrations for E, N, and Z channels. The maps of micro seismic temporal variations of vibrations have shown an anomaly in the area of soil subsidence.
Practical value/implications. The subsidence could be caused by the destruction of the walls of the Reserve underground catacombs, the change in the hydrological regime in the area due to frequent watering of the lawns, and the construction works under way around the Reserve. In interpreting the information obtained while measuring temporal variations in micro seismicity, five anomalous zones were detected. Four of them are correlated with the known zones of soil subsidence. On the picket 13, a fresh anomaly has occurred, which is likely to be the area of future instances of soil subsidence.
Keywords: micro seismic, exogenous processes, soil subsidence, temporary variations micro seismic fluctuations.
References:
- Hlobal’ne poteplinnya i naslidky dlya Ukrayiny. Available at: http://ua.textreferat.com/referat-5405-2.html (Accessed 28 June 2016) [in Ukrainian].
- Zdeshchyts V.M., Kalinichenko O.A., Pihulevs’kyy P.H., Rybalko B.I., Shcherbina S.V. Investigation of micro-seismic phenomena of anthropogenic origin. Geofizicheskiy zhurnal, 2015, vol. 37, no. 5, pp. 132-142 [in Ukrainian].
- Sofiys’kyy sobor (Kyiv). Available at: https://uk.wikipedia.org/wiki/%D0%A1%D0%BE%D1%84%D1%96%D0%B9%D1%81%D1%8C%D0%BA%D0%B8%D0%B9_%D1%81%D0%BE%D0%B1%D0%BE%D1%80_(%D0%9A%D0%B8%D1%97%D0%B2) (Accessed 5 May 2016) [in Ukrainian].
- Guralp 40T. Operator’s guide. Issue E, 2016. Available at: https://www.guralp.com/documents/MAN-040-0001.pdf (Accessed 01 May 2016).
- Modern laser devices for integrated geophysical observations. Available at: http://seismo.kiev.ua/Lasers/lasers.html (Accessed 01 June 2016).
- Oosthuizen A.C., van Rooy J.L. Hazard of sinkhole formation in the Centurion CBD using the Simplified Method of Scenario Supposition. Journal of the South African Institution of Civil Engineering, 2015, vol. 57, no. 2. URL: http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1021-20192015000200008 (Accessed 01 May 2016).
- Sinkholes and Karst Terrain Regions in America 1900 – 2015: Maps, Geological Data. Available at: https://americaninfomaps.wordpress.com/2015/03/18/sinkholes-and-karst-terrain-regions-in-america-1900-2015-maps-geological-data/ (Accessed 24 June 2016).