Abstract
We investigate ground deformation that occurred on national road infrastructure in North Buton Regency, South East Sulawesi, Indonesia. This research conducted to obtain spatial information about ground deformation occurred. Road infrastructure plays an important role in economic and transportation particularly in North Buton. Road damage will cause losses both economically and security. The method of the research was Interferometric Synthetic Aperture Radar (InSAR). InSAR uses two SAR Images from two different acquisitions to generate interferogram and then ground deformation parameter. We used Sentinel-1 images acquisition years of 2015 and 2017. We found that the ground deformation occurred between -118 to +20 millimeters during the year of 2015 and 2017 acquisition or about -59 to +10 millimeters per year and its direction from north to south of the road body. The movement of ground deformation is dominated downward movement which it is estimated strength affected by the presence of faults near the location.
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