Akademik Veri Yönetim Sistemi
Journal of scientific reports-A (Online), cilt.54, ss.194-211, 2023 (Hakemli Dergi)
Accidents and loss of life can occur in surface mines due to large mass
displacements (landslides). In order to prevent these irreversible situations,
it is very important to identify displacements in advance or to take necessary
measures by obtaining early warning signs. Within the scope of this study,
satellite radar images (SAR, Synthetic Aperture Radar) obtained from the
European Space Agency (ESA) Sentinel-1A satellite were used to reveal the
traceability and monitoring sensitivity of deformations and possible mass
displacements in the dump area of a mining operation. The results obtained from
2 Global Positioning Systems (GPS) installed in the field were compared with
the results obtained from satellite radar data and their compatibility with
each other was evaluated. When the horizontal/vertical velocity values obtained
by decomposing the Sentinel-1A ascending and descending satellite line of sight
(LOS, Line Of Sight) velocities were compared with the horizontal/vertical
velocity values of GPS, the results were statistically equal. GPS-based
vertical velocities were -131.5 mm/year at GPS1 and -20.7 mm/year at GPS2,
while Sentinel-1A-based velocities were -94.5 mm/year at GPS1 and -7.8 mm/year
at GPS2. While both GPS and satellite-based vertical deformations show the same
direction (in the form of subsidence), the deformation velocity values obtained
from satellite radar data are lower than GPS results. Horizontal deformations
obtained with satellite radar data could not be determined in the north/south direction
due to satellite orbital motions, while they could be partially determined in
the east/west direction. GPS-based east/west horizontal velocities were +2.8
mm/year in GPS1 and unsignificant velocity was found in GPS2. Satellite-based
east/west horizontal velocity values were +6.8 mm/year at GPS1 and +8.4 mm/year
at GPS2.