Reconstruct land subsidence in Jakarta from physical evidence
Heri Andreas, Dina Anggreni Sarsito, Dhota Pradipta, Hasanuddin Z Abidin

Institute of Technology Bandung

Abstract

Land subsidence can be revealed properly through GNSS (Global Navigation Satellite System) measurements and InSAR (Interferometry Synthetic Aperture Radar) and or other measurements. In terms of quality, the results from the time series measurement have obtained high accuracy at the millimeter level up to 1-2 centimeters. The quality parameter results are obtained from the standard deviation of the results and or the correlation between results of the measurement methods. To be more certain about the occurrence of land subsidence, we can reconstruct land subsidence using physical evidence, such as changes in the position of bridges relative to the water level, the relative position of buildings or structures on the coast to the sea and so on. Looking at physical evidence, we can also review when land subsidence occurred or estimate how long land subsidence occurred. This paper will try to show the results of land subsidence reconstruction in Jakarta using physical evidence. The results of the reconstruction show that the beginning of land subsidence in Jakarta occurred in the 1970s. The reconstruction results are validated by the results of leveling and GNSS measurements.

Keywords: land subsidence, reconstruct, physical evidence, measurement

Topic: Interdisciplinary Geosciences