| dc.description.abstract | Permanent Scatterers (PS) point velocities obtained by the interferometric synthetic aperture
radar (InSAR) method are generally determined using the linear regression model,
which ignores periodic and seasonal effects. In this study, software was developed that can
detect periodic effects by applying fast Fourier transformation (FFT) time series analysis
to InSAR results. Using the FFT time series analysis, the periodic components of the
surface movements at the PS points were determined, and then the annual velocity values
free from periodic effects were obtained. The study area was chosen as the Gediz Graben,
a tectonically active region where aseismic surface deformations have been observed in
recent years. As a result, using the developed method, seasonal effects were successfully
determined with the InSAR method at the PS points in the study area with a period of
384 days and an average amplitude of 19 mm. In addition, groundwater level changes of a
water well in the region were modeled, and 0.93 correlation coefficient values were calculated
between seasonal InSAR displacement values and water level changes. Thus, using
the developed methodology, the relationship between the tectonic movement in the Gediz
Graben in Turkey and the seasonal movements and the change in the groundwater level
was determined. | tr |
