Aquifer and Land Subsidence Interaction Assessment Using Sentinel-1 Data and DInSAR Technique

Climate change and overpopulation have led to an increase in water demands worldwide. As a result, land subsidence due groundwater extraction level decline is causing damage communities arid semiarid regions. The agricultural plain of Samalghan Iran has recently experienced wide areas subsidence, which hypothesized be caused by overexploitation. This hypothesis was assessed estimating the amount that occurred using DInSAR based on analysis 25 Sentinel-1 descending SAR images over 6 years. To assess influence changes this phenomenon, maps were produced, their relationship with evaluated. Results showed one major cause overexploitation, highest average occurring 2019 (34 cm) lowest 2015 2018 (18 cm). Twelve ascending used for relative validation processing. correlation value varied from 0.69 0.89 (an acceptable range). Finally, aquifer behavior studied, cultivation patterns optimal utilization resources suggested as practical strategies control current situation.