Land Subsidence of Jakarta (Indonesia) and its Geodetic Monitoring System

Hasanuddin Abidin, Rochman Djaja, Dudy Darmawan, Samsul Hadi, Arifin Akbar, H. Rajiyowiryono, Y. Sudibyo, I. Meilano, M. Kasuma, J. Kahar and Cecep Subarya

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2001, vol. 23, issue 2, 365-387

Abstract: Jakarta is the capital city of Indonesia with a population of about 10 million people, inhabiting an area of about 25 × 25 km. It has been reported for sometime that locations in Jakarta are subsiding at different rates. Up to the present, there has been no comprehensive information about the characteristics and pattern of land subsidence in the Jakarta area. Usually land subsidence in Jakarta is measured using extensometers and ground water level observations, or estimated using geological and hydrological parameters. To give a better picture about land subsidence, geodetic-based monitoring systems utilizing leveling and GPS surveys have also been implemented. The land subsidence characteristics of Jakarta and its surrounding area areinvestigated using data from three repeated leveling surveys performed in1982, 1991, and 1997, and two repeated GPS surveys conducted in 1997and 1999. Leveling surveys detected subsidence up to about 80 cm duringthe period of 1982–1991, and up to about 160 cm during the 1991–1997period; while GPS surveys observed subsidence up to about 20 cm duringthe period of 1997–1999. Comparison with the hydrological data shows thatland subsidence in Jakarta is strongly related to excessive groundwater extraction. Copyright Kluwer Academic Publishers 2001

Date: 2001
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DOI: 10.1023/A:1011144602064

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