摘要
以北京市典型地面沉降区为研究区,采用永久散射体技术——StamPS算法,利用覆盖北京地区的16幅ASAR图像进行永久散射体干涉处理,获得该区地面沉降监测信息,初步揭示了研究区地面沉降的空间分布特征。在此基础上,结合GIS空间分析方法,对地面沉降的风险范围、风险程度等进行综合分析,表明北京地区的地面沉降防治刻不容缓。
Land subsidence in Beijing has been an ongoing problem for the past four decades （since the later 1970s）,which is in- duced by over-pumplng groundwater continuously, becoming a negative effect on the sustainable economic development in plain areas. In this paper,Permanent Scatterers Interferometric Synthetic Aperture Radar（PS-InSAR）technique is used to detect and measure ground movement in this area（2003--2006）. The detail information of deformation shows that spatial extent of subsidence is controlled by geologic structures （ Huangzhnang-Gaoliying and Nankou Sunhe faults）. In consideration of a series damages by land subsidence, risk assessment and zoning are very important for risk management. Based on the land subsidence retrieved by PS- InSAR techniques using ASAR data, combining with the present situation of groundwater overexploitation and the thickness of compressive layer, a hazard assessment model of land subsidence in Beijing is established using the AHP-Fuzzy method, the AHP-Fuzzy assess- ment model is analyzed by using a GIS-based modeling approach. Then, a case study is carried out in Miyun-Huairou-Shunyi area of Bei- jing. As a result, the risk index of each study area is extracted by means of the AHP-Fuzzy method. Then the risk level of land subsidence is analyzed using the dimensional analytical method. It indicates that the risk of land subsidence in Beijing is indispensable. This result is reasonable and useful for land subsidence disaster prevention and reduction.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2011年第2期16-20,F0002,共6页
Geography and Geo-Information Science
基金
国家自然科学基金项目(40771170/D0120)
北京市自然科学基金项目(8082010
Kz201010028030)
水利部公益性行业科研专项经费项目(200901091)
北京市重点基金项目(8101002)
关键词
地面沉降
INSAR技术
地面沉降监测
风险分析
land subsidence
Interferometric Synthetic Aperture Radar （InSAR）
monitoring of land subsidence
risk analysis
作者简介
作者简介：陈蓓蓓（1985-），女，博士研究生，研究方向为区域地面沉降应用研究。
通讯作者E—mail：gonghl@263．net
