Land Subsidence Prone Areas Identification in Yogyakarta City using Sentinel-1 Imageries
Farhan Makarim Zein, Iqbal Putut Ash Shidiq, Rokhmatuloh
Universitas Indonesia
Abstract
Yogyakarta is the city with the raising in population growth every year. Population growth demands more land and water consumption. Land-use changes from natural to a built-up area like residential or commercial areas will increase the load of the land and decrease the water infiltration area. The intensively land-use changes have been lowering the ground-water surface with an average rate of 30 centimeters per year. The increasing of land load and the lowering of the ground-water surface will have implications on land subsidence. This study aims to map and to estimate the rate of land subsidence in Yogyakarta City. This study used remote sensing technology, especially an active remote sensing system. An Interferometric Synthetic Aperture Radar (InSAR) technique applied form Sentinel-1 radar satellite imageries can show the location of land subsidence. The result from InSAR will be compared with data from other optical imageries to analyze the factor of the subsidence.
Keywords: Land subsidence, land-use changes, InSAR, Sentinel-1, spatial analysis
Topic: Environment, Health, and Safety