首页 | 本学科首页   官方微博 | 高级检索  
     检索      

利用GPS与InSAR研究西安现今地面沉降与地裂缝时空演化特征
引用本文:张勤,赵超英,丁晓利,陈永奇,王利,黄观文,杨成生,丁晓光,马静.利用GPS与InSAR研究西安现今地面沉降与地裂缝时空演化特征[J].地球物理学报,2009,52(5):1214-1222.
作者姓名:张勤  赵超英  丁晓利  陈永奇  王利  黄观文  杨成生  丁晓光  马静
作者单位:1.长安大学地质工程与测绘学院,陕西 710054;2.香港理工大学土地测量与地理资讯系〓香港
基金项目:国家自然科学基金重点项目,国家自然科学基金,国土资源大调查项目 
摘    要:西安孕育严重的地面沉降及地裂缝灾害,严重制约着城市的现代化发展,本文采用GPS精密定位和InSAR遥感差分技术对西安地面沉降和地裂缝进行变形监测与分析,获取了西安地面沉降与地裂缝整体变形现状的珍贵信息,通过对这些变形信息的研究分析,揭示了西安现今地面沉降与地裂缝时空演化特征和机理:随着停止或限采地下水,西安地面沉降量级由20世纪90年代中期的最大年沉降速率20~30 cm/a减少到不足10 cm/a,且超过60%的沉降区域的年沉降速率已由90年代中期的5~8 cm/a减少到不足2 cm/a;原有的沉降中心大部分已不存在或大大减小;地裂缝在时空活动与分布上与地面沉降存在明显的关联性;地面沉降和地裂缝随着西安高新区的建设向南、西南、东南逐步扩展.

关 键 词:地面沉降与地裂缝  GPS与InSAR  变形监测  时空演化特征  
收稿时间:2008-3-18
修稿时间:2009-3-10

Research on recent characteristics of spatio-temporal evolution and mechanism of Xi'an land subsidence and ground fissure by using GPS and InSAR techniques
ZHANG Qin,ZHAO Chao-Ying,DING Xiao-Li,CHEN Yong-Qi,WANG Li,HUANG Guan-Wen,YANG Cheng-Sheng,DING Xiao-Guang,MA Jing.Research on recent characteristics of spatio-temporal evolution and mechanism of Xi''''an land subsidence and ground fissure by using GPS and InSAR techniques[J].Chinese Journal of Geophysics,2009,52(5):1214-1222.
Authors:ZHANG Qin  ZHAO Chao-Ying  DING Xiao-Li  CHEN Yong-Qi  WANG Li  HUANG Guan-Wen  YANG Cheng-Sheng  DING Xiao-Guang  MA Jing
Institution:1.School of Geological Engineering and Geomatics, Chang′an University,Shaanxi 710054,China;2.Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University
Abstract:Xi′an city, one of the famous historical cities in China, has been suffering serious land subsidence and ground fissure historically and even recently, which greatly restrict the modernization of this city. This study focuses on the monitoring and analysis of Xi′an land subsidence and ground fissure by applying the GPS and InSAR techniques. On the one hand, we achieved precious information of the overall deformation caused by both land subsidence and ground fissure. Based on the information, on the other hand, we studied the characteristics of spatio-temporal evolution and mechanism of the land subsidence and ground fissure, and obtained the following main conclusions. Firstly, owing to the effective controlling of underground water withdrawal, the maximum annual subsidence rate has decreased greatly from 20~30 cm/a in the mid-1990 s to less than 10 cm/a recently. Meanwhile the mean land subsidence rate of approximately 60% subsidence areas has decreased from 5~8 cm/a to 2 cm/a. Secondly, most of the original subsidence cones have disappeared or greatly reduced. Thirdly, we discovered obvious spatio-temporal correlations between ground fissure and land subsidence. Lastly, the land subsidence and ground fissure have gradually extended to south, southwest, and southeast suburbs of the city along with the expanding of the Xi′an Hi-tech zones construction.
Keywords:Land subsidence and ground fissure  GPS and InSAR  Deformation monitoring  The characteristics of the spatio-temporal evolution
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《地球物理学报》浏览原始摘要信息
点击此处可从《地球物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号