Spatial information on the rate of subsidence in North Coastal Area of Java and the estimation of inundation in 2031

Abstract North Coastal Java is a fast-growing area because many big cities such as Jakarta, Cirebon, Pekalongan, Semarang, and Surabaya exist. This experiencing several environmental problems, the biggest of which problem rate land subsidence. due to geological structure. The Coast located on soft soil, some groundwater utilization activities are less controlled. study aimed at (1) Obtaining information subsidence in 5 major northern coast (Jakarta, Surabaya) using remote sensing satellite data; (2) Analysing accuracy field survey (3) Estimating potential region be below 0 masl 2031; (4) causes method used was Difference Interferometry Synthetic Aperture Radar (DInSAR) determine simulate future. results showed that Jakarta (8/year), Cirebon (2 cm/year), Pekalongan (11.2 Semarang (6 (4.3 cm/year). research show error surface with validation City ± 0.01 m. value Nash Sutcliffe Efficiency (NSE) =. 0.787 good category. Simulation 2031 from 3 under will increase by 2710 ha (Jakarta), 3565 (Pekalongan), 846 (Semarang) 2021. It seems needs special attention deal compared other cities.