基于高分辨率PS-DInSAR的城郊地表沉降监测  

Monitoring Ground Subsidence in Suburbs Area with High-resolution PS-DInSAR

作　　者：阚晓云 

机构地区：[1]咸宁市勘察测绘院,湖北咸宁437100

出　　处：《北京测绘》2014年第6期5-8,共4页Beijing Surveying and Mapping

摘　　要：随着城市的扩张,大型城市的郊区逐步成为新的工业生产及居民中心,为满足生产及生活用水需求,地下水被大量开采,进而导致地表沉降。目前对地表沉降的监测多集中在城市区域,城郊的地表沉降较少受到关注。本文提出使用高分辨率永久散射体(PS)雷达差分干涉(PS-DInSAR)技术对大型城市郊区的沉降进行监测。选取某市城郊为实验区,使用覆盖该区的16幅高分辨率TerraSAR影像为数据进行PS-DInSAR沉降建模和解算,获取了该区大范围的高分辨率沉降信息。该市郊区最大年沉降速度达到62mm/a(即年沉降量),平均沉降速度为24mm/a。分析表明,该区域的不均匀沉降与地下水的开采密切相关。As the cities are expanding, their accessorial suburb areas are gradually becoming new centers for industrial pro- ductions and residential quarters. To meet the water need in these areas, the groundwater is massively exploited, which leads to land subsidence. Currently, the research on subsidence monitoring mostly concentrates on the urban areas. Few attentions are paid on the subsidence in the suburbs. This paper proposes to monitor subsidence in the suburb areas by the persistent scatterer differential radar interferometry （PS-DInSAR） technique. We select the suburban area of a city as the study area and execute the PS-DInSAR method to extract the subsidence in the study area using 16 high-resolution Terra- SAR images. The wide scale and high-resolution subsidence distribution map is generated, showing the maximum and mean subsidence rates are 62 and 24 mm/a. It is demonstrated that the heterogeneous subsidence is related to the ground- water extraction in this area.

关 键 词：城郊 沉降监测 高分辨率 地下水开采 

分 类 号：P258[天文地球—测绘科学与技术]