Mapping And Evaluating The Impact Of Land Subsidence In Semarang (Indonesia)

Irwan Gumilar, Hasanuddin Z. Abidin, Teguh P. Sidiq, H. Andreas, R. Maiyudi, M. Gamal, Y. Fukuda

Sari


Abstract. Semarang is the capital of Central Java province, located in the northern coast of Java island, Indonesia. Land subsidence in Semarang has been widely reported and its impacts can be seen already in daily life. Based on the estimation from Levelling, Interferometric Synthetic Aperture Radar (InSAR), Microgravity and Global Positioning System (GPS) survey methods, land subsidence with rates of up to about 19 cm/year were observed during the period of 1999 up to 2011. Results derived from GPS since 2008 up to 2011 show that land subsidence in Semarang has spatial and temporal variations, with spatial average rates of about 6 to 7 cm/year.

Based on the site visit surveys, the impacts of land subsidence can be seen in several forms such as cracks in buildings, damage of infrastructure (road and bridges), tilting and damaged houses, and wider expansion of coastal flooding (tidal flooding). Tidal flooding and tilting and damaged houses frequently occurs in the area where the subsidence rate is high (northern part of Semarang). Cracks in buildings and damage of infrastructure (road and bridges) occur in the boundary of large subsidence area and the less.

 Keywords : GPS , land subsidence, damages, coastal flooding, Semarang

 

Teks Lengkap:

PDF (English)

Referensi


Abidin, H.Z. (2007). Penentuan Posisi Dengan GPS dan Aplikasinya. P.T. Pradnya Paramita, Jakarta. Second edition. ISBN 979-408-377-1. 268 pp.

Abidin, H.Z, H. Andreas, I. Gumilar, T. P. Sidiq, Y. Fukuda (2012). Land subsidence in coastal city of Semarang (Indonesia): characteristics, impacts and causes. Geomatics, Natural Hazards and Risk, DOI:10.1080/19475705.2012.692336.

Arbriyakto, Dadri. Kardyanto, Dyan (2002) .Identifikasi pengukuran kerugian fisik Bangunan Rumah Dan Kerugian Sosial Penduduk Kawasan Pantai Kota Semarang. Proceeding – Kerugian pada Bangunan dan Kawasan Akibat Kenaikan Muka Air Laut pada Kota-Kota Pantai di Indonesia.

Beutler G, H. Bock, R. Dach, P. Fridez, A. Gade, U. Hugentobler, A. Jaggi, M. Meindl, L. Mervant, L. Prange, S. Schaer, T. Springer, C. Urschl, and P. Walser (2007). Bernese GPS software Version 5.0. In: R. Dach, U. Hugentobler, P. Fridez, and M. Meindl (eds) Astronomical Institute, University of Berne, 612 pp.

Hofmann-Wellenhof, B., H. Lichtenegger and E. Wasle (2007). GNSS Global Navigation Satellite Systems: GPS, GLONASS, Galileo, and More. Springer Verlag, Wien, 2007.

Leick, A. (2004) GPS Satellite Surveying. Third edition. John Wiley & Sons. New York, USA.

Marfai dkk. 2007. The Impact of Tidal Flooding on a Coastal Community in Semarang, Indonesia. Environtmentalist. DOI 10.1007/s10669-007-9134-4.

Murdohardono, D., T.M.H.L. Tobing, and A. Sayekti (2007). “Over Pumping ff Ground Water as one of Causes of Sea Water Inundation in Semarang City”, Paper presented at the International Symposium and Workshop on Current Ptidal floodinflems in Groundwater Management and Related Water Reosurces Issues, Kuta, Bali, 3-8 Desember 2007.

Murdohardono, D., G.M. Sudradjat, A.D. Wirakusumah F. Kühn, F. Mulyasari (2009), “Land Subsidence Analysis through Remote Sensing and Implementation

on Municipality Level; Case Study: Semarang Municipality, Central Java Province, Indonesia”, Paper presented at the BGR-GAI-CCOP Workshop on Management of Georisks “The Role of Geological Agencies in Government Practice of Risk Reduction from Natural Disaster”, 23-25 June 2009, Yogyakarta, Indonesia.

Sukhyar, R. (2003). “Status and Progress of Urban Geology In Indonesia”, Atlas and Urban Geology Vol. 14 : The Ground Beneath Our Feet: a Factor in Urban Planning, United Nations ESCAP (Economic and Social Commission for Asia and the Pacific), New York, pp. 335 – 340.

Supriyadi (2008). Separation of Gravity Anomaly Caused Subsidence and Ground Water Level Lowering of Time Lapse Microgravity Data Using Model Based Filter: Case Study Semarang Aluvial Plain (in Indonesian), PhD Dissertation. Institute of Technology Bandung, September, 146 pp.

Wells, D.E., Beck, N., Delikaraoglou, D., Kleusberg, A., Krakiwsky, E.J., Lachapelle, G., Langley, R.B., Nakoboglu, M., Schwarz, K.P., Tranquilla, J.M. and Vanicek, P., 1986, Guide to GPS Positioning (Fredericton, N.B., Canada: Canadian GPS Associates).