Land Subsidence of Jakarta Metropolitan Area
Land Subsidence of Jakarta Metropolitan Area
复制标题
雅加达都市区地面沉降
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
K. Wedyanto
中科院分区：
文献类型：
--
作者：
R. Djaja;J. Rais;H. Abidin;K. Wedyanto
地面沉降是地壳动力学作用下地壳垂直形变的一种。地面沉降改变了作为所有工程参考点的地面控制点的垂直位置（高度/高程），也影响了该地区所有基础设施的结构和其他相关活动。在雅加达市区建立了GPS地面沉降监测网，并分别于1997年12月、1999年6月、2000年6月、2001年6月和2001年10月进行了观测。GPS监测点的地面沉降速率在4年内的平均变化范围为7.5 ~ 32.8cm。这意味着地面沉降受点所在局部区域特性的影响。通过GPS卫星定期观测获得的高度已被用于计算地面沉降的趋势，并显示在潘泰Indah Kapuk（北雅加达）的最大速率为84毫米/年。此外，通过对GPS监测点附近的威尔斯井的地面沉降趋势与地下水位趋势的比较，发现两者之间存在正相关关系。由此可见，地下水开采对地面沉降也有一定的影响。考虑到地面沉降的影响，雅加达大都市区和其他城市的地面沉降调查是必不可少的，在支持空间规划，在现在和将来，并监测已建立的物理设施。定期保存的高度数据将是计算地面沉降的输入数据。
SUMMARY Land subsidence is one of vertical deformation of the earth’s crust as a consequence of crustal dynamics. Land subsidence changes the vertical position (height/elevation) of the ground control points as reference points for all engineering works, and which also influence the structure of all infrastructures and other related activities in the area. The GPS land subsidence monitoring network was established in Jakarta metropolitan area and the observations were held in December 1997, June 1999, June 2000, June 2001 and October 2001 respectively. The rate of land subsidence at each location of GPS monitoring points shown the average variations from 7.5 cm to 32.8 cm within four years period. This means that the land subsidence is influenced by the characteristic of local area where the points are located. The heights obtained by GPS satellite observation periodically has been used to figure out the trend of land subsidence and shown the largest rate of 84 mm/year at Pantai Indah Kapuk (North Jakarta). Moreover, comparing the land subsidence trend and the groundwater level trend at the wells located close to GPS monitoring points, a positive correlation between the two phenomena is shown. This can be concluded that the land subsidence is also influenced by groundwater extraction. Considering the land subsidence effect, the investigation of land subsidence in Jakarta metropolitan area and other cities is essential in support of spatial planning at present as well as in the future and of monitoring the established physical facilities. The availability of height data maintained periodically would be the input to figure the land subsidence out.