Establishment of the automated system of geodetic monitoring for structures of Tereble-Ritska HPP

The article presents the aspects of historical development of monitoring of Tereble-Ritska hydroelectric power station (HPP), which led to the need of establishing an automated system of geodetic monitoring (ASGM) of deformations of the water pipeline and other structures. Since 2018, the system has been automated and the instrumental part continues to be expanded. Thus, as of 2022, the instrumental part of ASGM includes 3 main components, namely: linear-angular measurements with the determination of meteorological parameters, satellite GNSS measurements, and piezometric measurements. This article presents the results of ASGM work in order to monitor deformations. There are also some advantages of using ASGM in comparison with classical measurements, which first of all allow determining of coordinates in real-time and increase the accuracy of spatial deformation detection to 2 mm (horizontal) and 3 mm (height) on an area of 2 km2. It is also possible to inform the maintenance services of the monitored object when the received deformation exceeds the established limits. According to the results of the time series of linear-angular measurements, it can be stated that the pipeline undergoes seasonal displacements which are manifested in the horizontal displacement of supports towards the HPP building from winter to summer, and vice versa from summer to winter. To date, the amount of special data for the aggregate analysis of linear-angular measurements with the determination of meteorological parameters, GNSS measurements and piezometric measurements is insufficient. As data accumulates, it will be important to establish relationships between these parameters.