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Title: INFLUENCE OF INTRAPLATE DEFORMATIONS ON THE STATE GPS NETWORK IN THE REPUBLIC OF BULGARIA
INFLUENCE OF INTRAPLATE DEFORMATIONS ON THE STATE GPS NETWORK IN THE REPUBLIC OF BULGARIA

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Yuri Tsanovski
10.5593/sgem2022/2.1/s09.29
10.5593/sgem2022/2.1
1314-2704
978-619-7603-40-8
English
22
2.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Geodesy and Mine Surveying
The Republic of Bulgaria is located on the periphery of the Eurasian tectonic plate, and part of it falls within the seismically active Aegean extensional region [1]. The study of modern crustal movements is important in terms of elucidating the geodynamic behaviour of the country on a regional and global scale. It should be taken into account when establishing and maintaining geodetic networks for high precision applications.
It should be noted that for the main carrier of the Bulgarian geodetic system - the State GPS network, only the velocities of the points of its Basic class are derived and published. Intra-plate displacements show an increase from about 1 millimetre per year in Northern Bulgaria to about 5 millimetres per year in Southern Bulgaria - mostly in the geodynamically very active South-West region [2].
For the present study, we have selected an area in the southeastern part of Bulgaria, a region with relatively homogeneous horizontal velocities with respect to Eurasia. The area is 1500 sq. km, with the presence of points from the basic class (9 points) and secondclass (28 points) GPS network. Class I level surveys are currently being carried out in the area, and the coordinates of the points in the State GPS network will be used as fixed points to determine the geodetic coordinates and heights of the bench marks from the level surveys.
The aim of the study is to show the effect of the manifested intra-plate deformations on the coordinates of the State GPS network, as well as the need to develop a strategy/methodology to account for point displacements over time and calculate them, taking into account the passive nature of the State GPS network of the Republic of Bulgaria.
[1] Perouse, E., N. Chamot-Rooke et al. (2012) Bridging onshore and offshore presentday kinematics of central and eastern Mediterranean: Implications for crustal dynamics and mantle flow, Geochemistry Geophysics Geosystems, Volume 13, Number 9, ISSN: 1525-2027;
[2] Georgiev, I., G. Mikhailov, P. Danchev, N. Dimitrov, M. Minchev, P. Gabensky (2020), State GPS Network. Processing and analysis of the measurements of the points of the basic class 2004 - 2018, monograph, Higher Geodesy 23, special edition, ISBN: 978954964138;
[3] Gospodinov, S. (2011), Determination of block deformations of the Earth's crust by measured baselines, monography;
[4] Valev, G., K. Vassileva (2018) The finite element method in the plane and in space for deformation analysis and applications, 18th International Symposium "Modern Technologies, Education and Professional Practice in Geodesy and Related Fields", Sofia 08-09 November 2018;
[5] Tsanovski, Yu and Ts. Danchev, “Horizontal intraplate velocity field model for the territory of Bulgaria derived from GNSS solution”, SGEM 2019 Conference Proceedings, ISSN 1314-2704, 2019, DOI: 10.5593/sgem2019/2.2/S09.021;
[6] Peneva E., On the implementation of the European Vertical Reference System in Bulgaria, 21th International Multidisciplinary Scientific Geo Conference Surveying, Geology and Mining, Ecology and Management (SGEM 2021). Conference proceedings. 2021. Conference : INFORMATICS, GEOINFORMATICS AND REMOTE SENSING, Albena, 14 – 22 August, 2021, ISSN 1314-2704, doi.org/10.5593/sgem2021/2.1/s09.48
[7] Instruction No. RD-02-20-1 of 15 January 2021 on the establishment and maintenance of the State Levelling Network, Ministry of Regional Development and Public Works, in Bulgaria;
[8] Lambeva, T., On the normal height differences determination from geopotential differences, 21th International Multidisciplinary Scientific Geo Conference Surveying, Geology and Mining, Ecology and Management (SGEM 2021). Conference proceedings. 2021. Conference : INFORMATICS, GEOINFORMATICS AND REMOTE SENSING, Albena, 14 – 22 August, 2021, ISSN 1314-2704, doi.org/10.5593/sgem2021/2.1/s09.49
[9] Kunchev, I., Systems approach to the state levelling network of the Republic of Bulgaria, 21th International Multidisciplinary Scientific Geo Conference Surveying, Geology and Mining, Ecology and Management (SGEM 2021). Conference proceedings. 2021. Conference : INFORMATICS, GEOINFORMATICS AND REMOTE SENSING, Albena, 14 – 22 August, 2021, ISSN 1314-2704, doi.org/10.5593/sgem2021/2.1/s09.54
conference
https://doi.org/10.5593/sgem2022/2.1/s09.29
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
235-240
04 - 10 July, 2022
website
8496
GNSS, deformation, intraplate velocities, State GPS Network