Authors: Hasanuddin Z Abidin I Gumilar H Andreas D Murdohardono Y Fukuda
Publish Date: 2012/07/25
Volume: 68, Issue: 6, Pages: 1545-1553
Abstract
The Bandung Basin is a large intramontane basin surrounded by volcanic highlands in western Java Indonesia inhabited by more than seven million people The basin an area of about 2300 km2 is a highland plateau at approximately 650–700 m above sea level and is surrounded by up to 2400 m high Late Tertiary and Quaternary volcanic terrain Based on the results of nine GPS surveys conducted since 2000 up to 2011 it was shown that several locations in the Bandung Basin have experienced land subsidence with an average rate of about −8 cm/year and can go up to about −23 cm/year in certain locations A hypothesis has been proposed by several studies that land subsidence observed in several locations in the Bandung Basin has been caused mainly by excessive groundwater extraction It is found that there is a strong correlation between the rates of groundwater level lowering with the GPSderived rates of land subsidence in several locations in Bandung Basin The GPS results in this study detected significant subsidence in the textile industry area where very large volumes of groundwater are usually extracted The impact of land subsidence in Bandung can be seen in several forms mainly in the cracking and damage of houses buildings and infrastructure Land subsidence also aggravates the flooding in Bandung Basin which has brought huge economic losses and deteriorated the quality of life and environment in the affected areas
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