Displacement Monitoring of Infrastructure using InSAR technology : A Case Study of Upper Reservoir of Lamtakong Jolabha Vadhana Power Plant

Abstract

The displacement of infrastructure is influenced by a variety of factors. If not monitored, it will result in heavy damage. Therefore, another alternative for monitoring structures is to use Interferometric Synthetic Aperture Radar (InSAR) technology, which can examine more structure details and reduce the use of human resources, resulting in a lower long-term cost of monitoring structures. The goals of this study were to present the results of using InSAR technology to monitor the displacement of infrastructure in a variety of formats. We used time-series data from each of the 34 Sentinel-1 satellite images for ascending and descending orbits, from January 2017 to January 2023. InSAR time-series technology was used to evaluate the data. The study area is the upper reservoir of Lamtakong Jolabha Vadhana Power Plant, located in Nakhon Ratchasima. The results showed that structure is subsiding, about -04.69 to +05.62 millimeters per year for ascending orbits and -03.84 to +05.84 millimeters per year for descending orbits which different displacements of structure may be caused by many reasons. An analysis using only ascending or descending orbits data may be insufficient. Using information from both ascending and descending orbits can improve analyses' accuracy. However, the results of InSAR time-series analysis can be applied to engineering techniques and geographic information to solve the problem more precisely.