Mapping land subsidence over the eastern Beijing city using satellite radar interferometry  

作　　者：Zheyuan Du Linlin Ge Alex Hay-Man Ng Li Xiaojing Liyuan Li 

机构地区：[1]Geoscience and Earth Observing System Group(GEOS),School of Civil and Environmental Engineering,UNSW Australia,Sydney,Australia [2]Department of Surveying Engineering,Guangdong University of Technology,Guangzhou,People’s Republic of China

出　　处：《International Journal of Digital Earth》2018年第5期504-519,共16页国际数字地球学报（英文）

基　　金：This research was supported under Australian Research Council’s Discovery funding scheme[project number DP130101694];JAXA PI investigation project 1419–Automated interferometric analysis of L-band SAR satellite data for operational earthquake and volcano monitoring.

摘　　要：Beijing City has suffered from groundwater-induced subsidence since the late 1930s and the over-exploration of groundwater could lead to subsidence as much as−12.0 cm yr−1.Previous studies on the ground deformation at Beijing City mainly focused on the period before the year of 2014 when a mega-engineering project was launched to reduce water shortage in Beijing.To study the most recent ground deformation,19 L-band ALOS-1 PALSAR images(June 2007–January 2011),24 C-band Sentinel-1 SAR images(June 2015–November 2016)together with 9 ALOS-2 PALSAR acquisitions(September 2014–February 2017)were analysed in this work.Levelling measurements were exploited to verify the ALOS-1-based time series InSAR(TS-InSAR)result while Sentinel-1 and ALOS-2 result were cross-verified with each other.Furthermore,the whole study area was divided into four sub-zones,and the result indicated that the subsidence rates over five townships,Cuigezhuan,Jinzhan,Liyuan,Songzhuang and Yanjiao were accelerating and more attentions should be paid.On the contrary,the town centre of Douge Zhuang township experienced a decreasing trend between these two temporal-periods.Additionally,the time series measurements with respect to five selected measurement points and the profile line along the subsidence hot spots were analysed.

关 键 词：SUBSIDENCE BEIJING GROUNDWATER SAR interferometry 

分 类 号：F42[经济管理—产业经济]