摘要
利用2016年4月—2017年3月间获取的17景sentinel-1SAR数据(VV极化),采用短基线集技术(SBAS)获取昆明地区地表形变信息,并对重点沉降区域沉降的时序特征及成因进行分析。结果表明:①昆明地面沉降在空间分布上呈现明显不均匀性,且沉降分布区域有所扩张;②昆明老城中心区、王家营至呈贡大学城一带等地区保持相对平稳;③老城区南部、东部和西部等多个沉降区相连,形成横跨昆明盆地的一条滇池近岸半弧形沉降带;④研究区域内最大沉降速率位于小板桥-义路村-广卫村一带,最大沉降速率为-52mm/a。
The surface average subsidence rate and accumulative subsidence of the kunming area from April 2016 to March 2017 were obtained with 17 sconces of sentinel-1 SAR imagery(vv polarization)respective by SBAS-InSAR techniques.And the temporal characteristics of key subsidence region were analyzed.The monitoring results showed:①In the study time,the surface subsidence in kunming appeared obvious inhomogeneity in the spatial distribution,and the surface subsidence distribution region was expanded.②The area of old Kunming city center and the area from wangjiagou to chenggong university town remain relatively stable.③The subsidence region of the south,east and west of the old city were connected,forming a semi-arc subsidence belt across the kunming basin.④In the study area,the area of the maximum subsidence rate was located in the xiaobanqiao-yilu village-guangwei village maximum subsidence rate was-52 mm/a.
作者
张国飞
岳彩荣
章婉秋
ZHANG Guo-fei;YUE Cai-rong;ZHANG Wan-qiu(Southwest Forestry University,College of Forestry,Kunming Yunnan 650224,China)
出处
《现代测绘》
2019年第4期12-16,共5页
Modern Surveying and Mapping
基金
云南省教育厅科学研究基金项目(2018JS330)
云南省哲学社会科学规划项目课题(YB2017078)
西南林业大学教改课题(YB201661)
