CREATION OF A LOCAL VERTICAL DATUM FOR GEODYNAMIC STUDIES IN THE AREA OF THE RIVNE NPP
Heading:
| DZHUMAN, B, YANKIV-VITKOVSKA, L, SHKVAROK, Y |
| Space Sci. & Technol. 2026, 32 ;(2):107-114 |
| https://doi.org/10.15407/knit2026.02.107 |
| Publication Language: English |
Abstract: Th e Rivne Nuclear Power Plant is one of the key facilities of Ukraine’s energy infrastructure. Given its strategic importance as
a critical infrastructure facility, particularly under martial law conditions, ensuring high-precision and continuous monitoring of its territory and engineering structures is of paramount importance. An additional risk factor is associated with the complex engineering and geological conditions at the station’s location. In this context, the selection of an appropriate vertical datum becomes crucial, as it must adequately refl ect the actual structure of the regional gravitational fi eld. Th e aim of this paper is to provide scientifi c justifi cation for and to develop a local vertical datum for the territory of the Rivne Nuclear Power Plant in the form of a high-precision geoid model adapted to the geodynamic and engineering-geological conditions of the region. Th e local vertical datum (local geoid model) was computed using the least squares collocation method, which is based on the stochastic representation of the disturbing potential of the gravity fi eld as a random function with known covariance characteristics. Th e input data included terrestrial gravimetry, high-precision leveling, and GNSS observations. A high-precision local geoid model for the study area was developed, and its accuracy was assessed. Th e standard deviation of the obtained model is 0.8 cm. Th is value indicates a high level of consistency between independent data sources and confi rms the validity of the adopted modeling methodology. Th e developed geoid model ensures a reliable transformation from ellipsoidal heights obtained from GNSS observations to physical heights without the need for high-precision leveling, thereby signifi cantly increasing the operational effi ciency and cost-eff ectiveness of monitoring activities. Its application enables maintaining consistency of multi-temporal measurements within a unifi ed gravitybased reference system, improves the reliability of determining millimeter-level vertical displacements of structures and territory, and enhances the interpretation of deformation processes under complex geological conditions |
| Keywords: geodynamics, geoid model, GeoTerrace network, GNSS, leveling, Rivne NPP |
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