基于时序InSAR技术的锁阳城遗址积沙过程  

Sediment accumulation process in the remains of Suoyang City based on time series InSAR technology

作　　者：谌文武[1] 吴海鱼 原鹏博[1] 郭志谦 刘沛然 CHEN Wen-wu;WU Hai-yu;YUAN Peng-bo;GUO Zhi-qian;LIU Pei-ran(Key Laboratory of Mechanics on Disaster and Environment in Western China with the Ministry of Education,College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;School of History and Culture,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学土木工程与力学学院,西部灾害与环境力学教育部重点实验室,兰州730000 [2]兰州大学历史文化学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2023年第5期655-663,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：国家重点研发计划项目(2020YFC1522201)。

摘　　要：研究锁阳城遗址沙丘的形成和发展过程,采用SBAS-InSAR技术对遗址区进行监测研究.选用2014年10月-2021年8月覆盖研究区域的42景升轨和41景降轨Sentinel-1A数据进行干涉处理,得到雷达视线方向的形变速率场,经过投影转换得到垂直方向的形变速率场,并验证了InSAR监测结果的精度,结合遗址区气象数据和锁阳城形制、保存现状特征进行综合分析.结果表明,锁阳城遗址区域沙丘发育呈现由西向东堆积速率逐渐增加的特点;西墙南段两侧及东墙外侧积沙速率最快,最大积沙速率为1.24 mm/a,西墙外侧以侵蚀为主,最大侵蚀速率为-0.89 mm/a;东风和西风占起沙风比率分别为67.92%和28.18%,与InSAR监测沙粒堆积方向一致.In order to study the formation and development process of sand dunes in the Suoyang City site,SBAS-InSAR technology was used to monitor the site area.The sentinel-1A data of ascending 42 and descending 41 covering the research area from October 2014 to August 2021 were selected for processing.The deformation rate field in the radar line of sight and the vertical deformation rate field were obtained after projection transformation,and the accuracy of InSAR monitoring results verified.Combined with the meteorological data and the characteristics of the shape and preservation status of Suoyang City,it was found that,in the Suoyang City site area,the accumulation rate gradually increased from west to east.The sand deposition rate on both sides of the south section of the west wall and the outside of the east wall was the fastest,and the maximum sand deposition rate was 1.24 mm/a.The outside of the west wall was mainly eroded,with the maximum erosion rate being-0.89 mm/a.The east wind and west wind accounted for 67.92%and 28.18%of the sand-moving wind,respectively,which was consistent with the sand accumulation direction monitored by InSAR.

关 键 词：锁阳城遗址 SBAS-InSAR 风沙 形变监测 

分 类 号：TU43[建筑科学—岩土工程]