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中文摘要：
地下水持续超量开采是导致北京地面沉降快速发展的主要原因。目前已形成南北两大沉降中心，在快速沉降区域，地表仍以每年30～60 mm的速度持续发展，对城市基础设施和人员安全造成危害。文中采用永久散射体干涉测量（PS-InSAR）技术获取北京平原区2003年-2009年地面沉降时间序列形变信息；综合气象数据、地下水监测网数据，SAR干涉测量数据和区域基底构造，建立地面沉降综合分析模型，阐明北京地面沉降空间分布特征，并对其成因机制进行初探。研究发现：（1）北京区域地面沉降不均匀性明显，多个沉降漏斗连成一片，沉降量受降雨入渗补给影响较大，表现出季节性波动变化特征；（2）沉降中心与地下水降落漏斗中心并非完全一致，第二承压含水层（底板埋深100～180 m）漏斗区与地面沉降中心在空间展布上较为吻合。（3）地面沉降多发生于粘性土层厚度50～70m地区。（4）地面沉降受区域基底构造控制作用明显，在断裂带两侧形变梯度较大。
英文摘要：
The present paper adopts permanent scatterer interferometric synthetic aperture radar（PS-InSAR）technique to obtain land subsidence information in Beijing plain area.Then,combined with the time series of meteorological data,groundwater dy-namic monitoring data,interferometric data and geological structure data,the formation and evolution mechanism of land subsid-ence were revealed.The results show that （1）Beijing regional land subsidence characteristics are obvious,more land subsidence funnel areas are interconnected,the settlement is influenced by rainfall recharge and exhibits seasonal fluctuation characteristics;（2 ）The land subsidence center and groundwater drawdown funnel centre are not fully consistent,unconfined aquifer and shallow confined aquifer are the major contribution factors and have greater impact on the land subsidence;（3）Land subsidence mainly occurred in the clay layer with a thickness of 50~70 m;（4）Land subsidence caused by tectonic controls is significant and the deformation gradient is great on both sides of the fault.
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