Land subsidence characteristics of Jakarta between 1997 and 2005, as estimated using GPS surveys |
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| Authors: | Hasanuddin Z Abidin H Andreas Rochman Djaja Dudy Darmawan M Gamal |
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| Institution: | (1) Geodesy Research Division, Faculty of Civil and Environmental Engineering, Institute of Technology Bandung (ITB), Jl. Ganesha 10, Bandung, 40132, Indonesia;(2) National Coordinating Agency for Survey and Mapping (BAKOSURTANAL), Cibinong, Bogor, Indonesia |
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| Abstract: | Jakarta is the capital city of Indonesia with a population of about 12 million people, inhabiting an area of about 625 km2. It is well known that several areas in Jakarta are subsiding rapidly. There are four different types of land subsidence
that can be expected to occur in the Jakarta basin, namely: subsidence due to groundwater extraction, subsidence induced by
the load of constructions (i.e., settlement of high compressibility soil), subsidence caused by natural consolidation of alluvial
soil and tectonic subsidence. In addition to the leveling method, Global Positioning System (GPS) survey methods have been
used to study land subsidence in Jakarta. In this paper, we characterize subsidence in the Jakarta basin using eight episodic/campaign
GPS surveys between 1997 and 2005. The estimated subsidence rates are 1–10 cm/year. The observed subsidence rates in several
locations show a positive correlation with known abstraction volumes of groundwater extraction. These basin-wide series of
GPS measurements show how this type of measurement can play an important role in multiple public policy decision making in
this rapidly growing area. |
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| Keywords: | Jakarta Land subsidence GPS Groundwater |
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