STUDYING LAND SUBSIDENCE OF BANDUNG BASIN (INDONESIA) USING GPS SURVEY TECHNIQUE

AbstractBandung basin is a large intra-montane basin surrounded by volcanic highlands, inhabited by more than five million people. Based on four GPS (Global Positioning System) surveys conducted on February 2000, November 2002, July 2002 and June 2003, it can be concluded that in the period of 2000 to 2003 several locations in Bandung basin have experienced land subsidence. In this period of about 3 years, land subsidence in a few locations can reach the amount of 40 to 50 cm, with the speed of about 1-2 cm/month. This paper describes the technical and practical aspects of GPS surveys for land subsidence study in Bandung basin along with the obtained results. This study shows that the amount of land subsidence in several locations of Bandung basin do not show significant correlation with the registered abstraction volume of groundwater in that locations. Paper will sum up with some conclusions and recommendations.