摘要
城市区域大多实施了严格有效的沉降防控措施,地表沉降逐渐由城市向郊区发展,监测城市周边郊区的地表沉降十分有必要。基于时序InSAR技术,利用28景Envisat ASAR影像获取了天津市西郊的地表沉降速率以及沉降的历史演化信息。实验结果显示,在2007年-2010年间,天津市城区的地表沉降较为缓慢,而郊区则出现了3个大的沉降漏斗,并且以最大沉降速率超过100 mm/a的速度快速发展,有与河北沉降漏斗连通的趋势。
The land subsidence in urbans has been greatly reduced due to decrease of extraction of groundwater. However, there are many regions in suburbs undergong land subsidence, and meanwhile, the subsidence are kept expanding. Therefore, it is essential to monitor this subsidence located in suburbs. In this paper, the land subsidence and the evolution of subsidence in the suburb of Tianjin have been extracted using multi temporal InSAR based on 28 Envisat ASAR iamges acquired from 2007 to 2010. Results show that there are three large subsidence basins in this area. The maximum rate of subsidence exceeds 100 mm/a, and one of these basins maybe expands to Hebei province in the future.
出处
《城市勘测》
2016年第6期65-69,共5页
Urban Geotechnical Investigation & Surveying
