摘要
采用PS-InSAR技术对覆盖廊坊北部地区的33景Envisat ASAR影像进行处理,获取该地区2007～2010年平均形变速率场与季度时序沉降信息,并与沉降影响场数据进行耦合分析。结果表明:1)宋庄-燕郊与五百户-大口屯等地区沉降发育较显著,季节性变动特征明显;2)山前与杨各庄-马坊地区呈高沉降梯度,平原区较高沉降梯度区多与-16mm/a、0mm/a等值线形态一致,差异性沉降特征显著;3)因第四系厚度、结构显著差异与断裂活动影响,北、东部断层两侧多表现为较高或渐变的形变梯度;4)差异性沉降展布与水源地、水位降深区具较好空间响应,且较严重沉降多为中深层承压水超采与城镇化建设所致。
This study conducts image processing of 33 ENVISAT ASAR data covering the northern area of Langfang city and extracts the annual average velocity and quarterly series information of land subsidence in the time span of 2007-2010.In addition,coupled analysis of subsidence monitoring data and influencing factors information is carried out to analyze causes.The results show:that the higher scale settlement areas are mainly distributed in Songzhuang-Yanjiao,Wubaihu-Dakoutun and other scattered areas with seasonal fluctuation due to rainfall recharge;there appear differential subsidence characteristics exhibiting high subsidence gradients in the mountain frontier and Yanggezhuang-Mafang areas,while monotonous appearances between rather high land subsidence gradient distributions and the-16 mm/a and 0 mm/a contour lines;there are rather high or gradual subsidence gradients on both sides of the faults in the northern and eastern parts of study area,due to the fault activities and significant difference in the thickness and structure of Quaternary aquifers system;an high agreement with the distributions of water head sites and drawdown area,revealing that the overexploitation of deep confined water and urbanization construction are the primary cause of severe subsidence.
作者
李海君
张耀文
谷洪彪
迟宝明
宋洋
LI Haijun;ZHANG Yaowen;GU Hongbiao;CHI Baoming;SONG Yang(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,Harbin 150080,China;School of Emergency Management,Sanhe 065201,China;School of Ecology and Environment,Sanhe 065201,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2018年第11期1122-1127,共6页
Journal of Geodesy and Geodynamics
基金
河北省高等学校科学技术研究指导项目(Z2017046)
防灾科技学院教学研究与教学改革项目(JY2017B12)
中国地震局地震行业科研专项(201508009)
中央高校基本科研业务费专项(ZY20130205)~~
关键词
PS-INSAR
廊坊北部
差异性沉降
分布特征
成因分析
PS-InSAR
northern area of Langfang city
differential subsidence
distribution characteristics
causation analysis
作者简介
李海君,博士生,讲师,主要从事环境地质灾害防御及应急管理相关研究,E-mail:lhjun777@163.com。
