Estimation of Mining Subsidence in Talcher Region using Time Series Earth Observation Data

To investigate mining subsidence efficient technologies and methods are needed since current ground-based methods are expensive and time-consuming and they used only to monitor specific points. With this we aimed to demonstrate surface changes resulting from coal mining operations in Talcher region, India. Sentinel-1 SAR images were used to monitor and map land sinking area in the region over the period 2017-2022. A total 167 descending images of Sentinel-1 were used and have performed a time series analysis. The study reveal as considerable subsidence rate was observed, particularly reaching -20.1 mm/year at few locations. However, other areas show a comparatively low subsidence rate. Despite this, a large portion of the study area showed a comparatively low rate of subsidence. This study provides a preliminary insight into potential hazard in the mining area.