The determination of vertical deformation velocities in the city center of Bolvadin/ Afyonkarahisar

In this study, the aseismic surface deformations occurring in Bolvadin district center are investigated with precise leveling technique. For this purpose, a leveling network consisting of 8 profiles and 81 points was established in the region. Within the scope of TUBITAK Project numbered 115Y246, 3 campaign of leveling measurements were collected in the study area. In 2019 and 2020, two more measurements campaigns performed within the scope of this study. Therefore, 5 campaigns of measurements were evaluated to investigate the surface deformations. As a result of the evaluations, the deformations up to 360 mm in total were calculated. It is assumed that the reason for this deformation could be of tectonic origin with the decrease in groundwater levels. When the results of the campaign measurements are examined, the rate of deformation increased from 2016 to 2020 and continues to increase steadily. When the 2019-2020 adjusted height differences are examined, it is seen that the deformation rate in the previous years has been doubled.