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利用SBAS-InSAR研究汶川地震后鲜水河断裂西北段的形变特征

Deformation characteristics of the northwest section of Xianshuihe fault zone after Wenchuan earthquake with utilization of SBAS-InSAR
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摘要 选取鲜水河断裂西北段2008年8月30日-2009年7月11日8景Envisat ASAR数据,基于SBAS-InSAR技术,获取了年平均形变速率图和7景时间序列图.结果表明:鲜水河断裂带附近视线向最大隆升值为27.0 mm/a,最大沉降值为23.0 mm/a,形变值主要集中在-7.7-3.4 mm/a.主要的隆升区域位于道孚断裂的东北段,主要的沉降区域位于甘宁断裂的南段.鲜水河断裂西北段的形变量值很小,变化缓慢,每个地区月变化基本都在毫米范围内,断裂带隆升过程中可能出现沉降,沉降过程中也可能出现隆升,隆升和沉降说明在一段时间内断裂带总的运动趋势. Based on SBAS-InSAR technology, 8-scene Envisat ASAR data of the northwest section of Xianshuihe fault from August 30, 2008 to July 11, 2009 is selected. The annual average deformation rate and 7-scene time sequence diagram are obtained. The results showed that the maximum uplift value of line of sight direction near Xianshuihe fault zone is 27.0 mm/a, the maximum subsidence value is 23.0 mm/a, the deformation value is mainly concentrated from-7.7 mm/a to 3.4 mm/a. The main uplift area lies in the northeast of Daofu fault zone while the main subsidence area is located in the southern section of Ganning fualt zone. The deformation value of northwest section of Xianshuihe fault zone of is very small with slow change. The monthly variation of each zone is basically within the scope of millime- ter. Subsidence may occur in the process of fault uplift while uplift may also happen in the process of subsidence. Uplift and subsidence shows a general trend of movement of the fault zone within a period of time.
作者 杨珍 张永志 张文军 赵延岭 刘传金 叶凯 Yang Zhen1, Zhang Yong-zhi2, Zhang Wen-jun3, Zhao Yan-ling2, Liu Chuan-jin2, Ye Kai2( 1. The First Institute of Photogrammetry and Remote Sensing, National Administration of Surveying, Mapping and Geoinformation, Xi'an 710000, China ;2. School of Geology Engineering and Geomaties, Chang'an University, Xi'an 710000, China; 3. Map Institute, Gansu Administration of Surveying and Mapping Geoinformation, Lanzhou 730000, China)
出处 《兰州大学学报:自然科学版》 CSCD 北大核心 2018年第1期51-58,共8页 Journal of Lanzhou University(Natural Science)
基金 国家自然科学基金项目(41374028) 中央高校基本科研业务费专项资金项目(310826165025)
关键词 合成孔径雷达干涉测量技术 年平均形变速率 隆升 沉降 鲜水河断裂 interferometric synthetic aperture radar annual average deformation rate uplift subsid-ence Xianshuihe fault zone
作者简介 杨珍(1984-),女,陕西西安人,工程师,博士,e—mail:yangzhen6@qq.com,研究方向为地理信息技术.
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