利用时序InSAR技术分析北京及河北廊坊地面沉降

发布时间：2018-04-02 07:48

本文选题：时序InSAR　切入点：北京地区　出处：《测绘科学》2017年07期

【摘要】：利用带大气估计模型的时序InSAR方法对24幅覆盖北京及河北廊坊的Envisat-ASAR影像数据进行了时序分析,获取了该地区2007年4月—2010年9月的地面沉降速率及均方差。发现了以北京朝阳区和通州区交界处为中心和以河北廊坊城区为中心的两个沉降区域,中心区平均沉降速率分别为35mm/a与22mm/a。研究区域形变速率均方差1.5mm/a。研究结果表明:利用时序InSAR技术进行城市地表沉降监测具有较好的精度及稳定性;产生该沉降的可能原因为地下水的开采、城市基础建设的发展及工业用地量、人为活动的增加。
[Abstract]:The temporal analysis of 24 Envisat-ASAR images covering Beijing and Langfang, Hebei Province, was carried out by using the time-series InSAR method with atmospheric estimation model. From April 2007 to September 2010, the land subsidence rate and mean square deviation (RMS) of this area were obtained. Two subsidence areas were found, which were located at the junction of Chaoyang District and Tongzhou District in Beijing and at the center of Langfang City District in Hebei Province. The average settlement rate of the central area is 35mm/a and 22mm / a respectively. The mean square deviation of the deformation rate in the studied area is 1.5 mm / a. The results show that the time series InSAR technique has good accuracy and stability in monitoring urban surface subsidence. The possible causes of this settlement are the exploitation of groundwater, the development of urban infrastructure, the increase of industrial land use and the increase of human activities.
【作者单位】：武汉大学测绘学院;
【基金】：国家自然科学基金项目(41431069,41204010) 国家科技部科技基础性工作专项(2015FY210400)
【分类号】：P237;P642.26

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