ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 3, pp. 129-139

On the mechanism of land surface vertical oscillations in urban areas (by satellite radar interferometry)

V.I. Gornyy1 , S.G. Kritsuk1 , I.Sh. Latypov1 , A.G. Olovyanny2 , S.D. Petrov3 , A.A. Tronin1 
1 Saint Petersburg Scientific-Research Centre for Ecological Safety RAS, Saint Petersburg, Russia
2 St. Petersburg Division of Sergeev Institute of Environmental Geoscience RAS, Saint Petersburg, Russia
3 Saint-Petersburg State University, Saint Petersburg, Russia
The permanent scatters technique of satellite radar interferometry was applied on the territory of St. Petersburg historical center. ERS-1 and ERS-2 multiple radar satellite survey data were used for this project supported by the St. Petersburg Government. Vertical oscillations of land surface with amplitudes of about few tens of millimeter were recorded for the urban territory. The analysis of long time series of Global Positioning System receiving antenna geodetic highs allows a hypothesis about underground water level seasonal variations as the main reason of these land surface oscillations. A mathematical model describing the ground deformations under the influence of seasonal underground water level variations was built. After that, mathematical simulation of this process was carried out. As a result, it was proved that vertical ground surface oscillations can be induced by underground water level variations. The order of magnitude of these oscillations amplitude is about 10 mm. These amplitudes coincide with the results of permanent scatters high variations recorded by satellite radar interferometry. Observations of renovated buildings located at places with high amplitudes of ground surface oscillations exhibited vertical cracks crossing the walls from the basement up to the top of the buildings.
Keywords: satellite, radar, interferometry, GPS, urban area, ground, vertical oscillations, mathematical simulation, deformation.
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