Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR

Groundwater variation can cause land-surface movement, which in turn significant and recurrent harm to infrastructure the water storage capacity of aquifers. The capital cities England (London) India (Delhi) are witnessing an ever-increasing population that has resulted excess pressure on groundwater resources. Thus, monitoring groundwater-induced land movement both these is very important terms understanding risk posed assets. Here, Sentinel-1 C-band radar images persistent scatterer interferometric synthetic aperture (PSInSAR) methodology used study for London National Capital Territory (NCT)-Delhi from October 2016 December 2020. velocities were found vary between −24 +24 mm/year −18 +30 NCT-Delhi. This was compared with observed levels, spatio-temporal studied conjunction. It broadly extraction a large quantity leads subsidence, whereas recharge uplift. A mathematical model quantify subsidence/uplift occurred due depletion/rebound. first compares PSInSAR-derived subsidence response change NCT-Delhi during this time-period. results could be helpful examine potential implications ground-level resource management, safety, economics cities.