Abstract
Landslides are one of the natural hazards that occur annually in Indonesia. A continuous geodetic observation in the landslide prone area is essential to support the precautionary measures. Because of its hilly topography, torrential rainfall and landslide history, the Ciloto district in Indonesia has been affected by ground deformation for an extended period of time. The purpose of our study is to detect significant movement and quantify the kinematics of its motion using the Interferometric synthetic aperture radar (InSAR) time series analysis and multi-band SAR images. We utilized the small baseline SDFP technique for processing multi-temporal SAR data, comprising ERS1/2 (1998–1999), ALOS PALSAR (2007–2009), and Sentinel-1 (2014–2018). Based on the detected deformation signal in the Ciloto area, the displacement rates are categorized as very slow movements. Two active main landslide zones; the Puncak Pass and the Puncak Highway area, which show the trend of slow movement progressively increasing or descreasing, were detected. The integration of the velocity rate between InSAR results and ground observations (e.g., terrestrial and GPS) was conducted at the Puncak Highway area from the temporal perspective. Using the polynomial model, we estimated that the area had cumulatively displaced up to −42 cm for 25 years and the type of movements varied from single compound to multiple rotational and compound.
Highlights
Indonesia is frequently hit by landslides which damage the environment and its properties and cause loss of lives
We evaluated the characteristic of ground motion for the period 1998 to 2018 using the time series Interferometric synthetic aperture radar (InSAR) results of multi-temporal ERS1/2, ALOS PALSAR, and Sentinel-1 product
The number of Persistent Scatter (PS) points generated by ERS and ALOS data are significantly less than Sentinel-1 in the region of interest
Summary
Indonesia is frequently hit by landslides which damage the environment and its properties and cause loss of lives. 1.3% of the population is affected by landslides and 1.1% of deaths are due to this geological hazard [1]. The percentage of landslides is relatively lower than that of other natural hazards (e.g., earthquakes, tsunamis, volcanic eruptions, mud volcanoes), to a considerable extent, landslides still significantly affect society in the mountainous areas of Indonesia. The discovery of the phase change contribution to measuring surface deformation from the European Remote Sensing Synthetic Aperture Radar (ERS SAR) mission in 1993 [3] has opened an extensive opportunity to understand the Earth’s surface change phenomena such as tectonics, the landers earthquake, volcanism, subsidence, and landslides using the spaceborne technology
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
