利用InSAR技术的兰州盆地地面沉降监测  

Land Subsidence Monitoring of Lanzhou Basin Using InSAR Technology

作　　者：焦美榕 吴静[1] 李纯斌[1] 张佩佩 Jiao Meirong;Wu Jing;Li Chunbin;Zhang Peipei(College of Resource and Environment,Gansu Agricultural University,Lanzhou 730070,China;Lanzhou Survey and Mapping Intitute,Lanzhou 730030,China)

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]兰州市勘察测绘研究院,甘肃兰州730030

出　　处：《国土与自然资源研究》2023年第4期59-64,共6页Territory & Natural Resources Study

基　　金：国家自然基金项目(31760693)。

摘　　要：兰州盆地位于我国陇西黄土高原的西部边缘与青藏高原的交接地带,是典型的黄土地貌,发生地面沉降的可能性极大,目前对于兰州盆地的监测手段和预测手段都较少。利用2019年5月至2021年3月期间的30景Sentinel-1A数据,基于小基线集合成孔径雷达干涉测量(small baseline subset interferometry,SBAS-In SAR)技术对兰州市进行了地面沉降监测,获得了兰州盆地该时间段年均沉降速率和时序地表累积形变图,揭示了观测期间兰州盆地详细的地面沉降变化特征。结果表明,在2019年至2021年整个观测期间,兰州盆地地表形变总体上处于平稳状态,只有小部分区域出现了沉降,与该地区历史沉降监测结果具有较好的延续性和一致性;兰州市轨道交通1号线沿线出现了不同程度的地面沉降,但大部分路段波动幅度都非常小,处于稳定状态。这一监测结果有助于全面掌握兰州地区最近的地面沉降状况。The Lanzhou Basin is located at the intersection of the western edge of the Longxi Loess Plateau and the Qinghai-Tibet Plateau in my country.It is a typical loess landform and has a great possibility of land subsidence.Currently,there are few monitoring and prediction methods for the Lanzhou Basin.Using the Sentinel-1A data of 30 scenes from May 2019 to March 2021,based on the small baseline subset interferometry(SBAS-InSAR)technology,the land subsidence monitoring of Lanzhou City was carried out,and the results were obtained.The annual average subsidence rate and time-series cumulative surface deformation map of the Lanzhou Basin during this period reveals the detailed characteristics of land subsidence changes in the Lanzhou Basin during the observation period.The results show that,during the entire observation period from 2019 to 2021,the surface deformation of the Lanzhou Basin was generally stable,and subsidence occurred in only a small part of the area,which has good continuity and consistency with the historical subsidence monitoring results in this area.Lanzhou different degrees of land subsidence have occurred along the city rail transit line 1,but most of the road sections have very small fluctuations and are in a stable state.This monitoring result helps to fully grasp the recent land subsidence in Lanzhou.

关 键 词：地面沉降 Sentinel-1A SBAS-InSAR 地铁 兰州市 

分 类 号：P237[天文地球—摄影测量与遥感]