基于SBAS-InSAR的北京地区地表沉降监测与分析

运用SBAS-InSAR获取北京地区的地表沉降信息，采用18景ENVISAT ASAR影像完成北京地区2007～2010年地表沉降的时空分析。结果表明，北京地区沉降不均匀较为严重，在昌平区、顺义区、通州区等区域出现多处沉降漏斗，且有连成一片并向东扩张的趋势；大部分地区的平均沉降速率在-150 ～10 mm/a，沉降中心的最大沉降量超过400 mm；地表沉降受地下水开采与城市化影响明显。

Monitoring and Analyzing on Ground Settlement in Beijing Area Based on SBAS-InSAR

In this paper, SBAS-InSAR is used to obtain high resolution ground subsidence information for the Beijing region. A spatial-temporal analysis of the ground subsidence in the region during the years of 2007 to 2010 is performed utilizing eighteen ENVISAT ASAR images. The results show that subsidence in the Beijing region is severely uneven; that multiple subsidence funnels formed in Changping district, Shunyi district, Tongzhou district, etc. are interconnected and have an eastward expansion trend; that the subsidence velocities in most areas are in the range of -150 mm/a to 10 mm/a and the maximum subsidence is over 400 mm; and that ground subsidence is influenced by groundwater exploitation and urbanization significantly.