EGU21-12489
https://doi.org/10.5194/egusphere-egu21-12489
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The first result of geodetic implications on intra-graben subsidence along the eastern part of the Gediz graben

Yavuz Gül1, Hüseyin Duman2, Kemal Özgür Hastaoğlu1, Fatih Poyraz1, İbrahim Tiryakioğlu3, Hediye Erdoğan4, Alperen Doğan5, and Süleyman Güler1
Yavuz Gül et al.
  • 1Sivas Cumhuriyet University, Faculty of Engineering, Dept. of Geomatics Engineering, Sivas, Turkey (yvzgul58@gmail.com)
  • 2Yildiz Technical University, Faculty of Civil Engineering, Dept. of Geomatics Engineering, İstanbul, Turkey
  • 3Afyon Kocatepe University, Faculty of Engineering, Dept. of Geomatics Engineering, Afyon, Turkey
  • 4Aksaray University, Faculty of Engineering, Dept. of Geomatics Engineering, Aksaray, Turkey
  • 5Manisa Celal Bayar University, Sarıgöl Vocational School, Manisa, Turkey

The Western Anatolian extensional tectonic regime results in developing a set of approximately E-W trending Horst-Graben morphology. The Gediz graben accommodating many fertile lands is one of the significant tectonic structures associated with that regime. Intensive grape cultivation requiring irrigation has been conducted in these lands for many years, which causes a permanent decrease in the water budget as a consequence of increasing farming activities. Hence, we have aimed to clarify better spatial subsidence of the eastern part of the Gediz graben and performed at first InSAR data to obtain land-surface deformations. Towards the middle of graben, the line-of-sight deformation rates of InSAR from LiCSAR products reach gradually up to nearly 10 cm/yr. To confirm these rates, we monumented four continuous GNSS stations.  One of which was located out of the graben while the rest were at the graben in June 2020. Analysis of such a short time-series does not make sense; however, the vertical displacements for the closest stations to the center of the graben reach up to about 8 cm. while out of the graben station seems to be stable visually. It is worth stating that the givens are biased due most likely to the periodic signals. Consequently, the gradually increasing subsidence rates towards the graben center showed that have not been driven only by tectonic settlements but could also be driven by other phenomena. These results are the first results of the ongoing project no 119Y180 supported by TUBITAK.

Keywords: Land subsidence, GPS, InSAR, Gediz Graben

How to cite: Gül, Y., Duman, H., Hastaoğlu, K. Ö., Poyraz, F., Tiryakioğlu, İ., Erdoğan, H., Doğan, A., and Güler, S.: The first result of geodetic implications on intra-graben subsidence along the eastern part of the Gediz graben, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12489, https://doi.org/10.5194/egusphere-egu21-12489, 2021.

Displays

Display file