Monitoring Surface Subsidence Using Time Series InSAR Technology and Sentinel-1 Data in Hunshandake Sandy Land

The time-series InSAR technique is commonly used for surface subsidence monitoring, providing insights into the trends of environmental changes. In this study, we employed the time-series InSAR technique in the Hunshandake Sandy Land, which will help evaluate the effectiveness of desertification control measures. The results show that there is no significant widespread subsidence or uplift in the Hunshandake Sandy Land, indicating limited movement of sand particles and minimal impact from human activities. However, within certain small areas of the study region, notable surface subsidence and uplift phenomena were observed, which can be attributed to saline-alkali land presence. Additionally, InSAR monitoring revealed pronounced decorrelation in the crescent-shaped dune region, suggesting rapid surface changes occurring on these dunes.