GEODETIC DEFORMATION MONITORING AROUND TRABZON TIDE GAUGE STATION

This study investigated three dimensional deformations with GNSS measurements around TRBZ tide gauge station located in the Eastern Black Sea region, Trabzon province, sea port area. For this purpose, a geodetic GNSS control network was established in the study area. The GNSS network consists of three reference points and two object points. In the GNSS network, two periods of static GNSS measurements were conducted, in June 2020 (1st Period) and in October 2020 (2nd Period). Magnetwork Tools v5.1 software was used to evaluate the GNSS measurements obtained. After evaluating the measurements, the coordinate differences (base components) ΔX, ΔY and ΔZ of the points in the WGS-84 system and the variance-covariance matrices of these differences were obtained. After this process, the adjusted coordinates of the points and variance-covariance matrices were obtained by adjusting each period with the algorithms written in the MATLAB R2016b program using the free network method. Deformations occurring between different periods were examined with the static deformation model by using the θ2-criterion method. All calculations in this study were made using MATLAB program codes written by us.