| 利用SBAS-InSAR技术反演雅鲁藏布江色东普流域灾前冰川形变 |
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| 引用本文： | 朱邦彦,任志忠,张琪,李云,王晓.利用SBAS-InSAR技术反演雅鲁藏布江色东普流域灾前冰川形变[J].测绘通报,2021,0(11):31-35. |
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| 作者姓名： | 朱邦彦 任志忠 张琪 李云 王晓 |
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| 作者单位： | 1. 南京市测绘勘察研究院股份有限公司, 江苏 南京 210019;2. 广州长地空间信息技术有限公司, 广东 广州 510663;3. 江苏海洋大学海洋技术与测绘学院, 江苏 连云港 222005 |
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| 基金项目： | 国家自然科学青年基金（41806117）；江苏省自然资源科技项目（2020058）；南京市测绘勘察研究院股份有限公司科研项目（2019RD11；2019RD12）；广东省级促进经济高质量发展专项（GDNRC[2020]050） |
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| 摘 要： | 本文基于30景Sentinel-1影像，首先采用SBAS-InSAR技术反演了2018年4-10月雅鲁藏布江色东普流域灾前冰川形变，并利用非冰雪覆盖的基岩区形变结果进行可靠性检验，得出均方根误差为9 mm，表明SBAS-InSAR技术应用于冰川形变监测具有较高的可靠性。然后分析了升降轨数据对不同坡向形变监测的敏感性，以及冰川碎屑流灾害发生前冰川形变的空间分布与时间演化特征。结果表明，冰川运动的主流线在东西坡交汇的中轴部，研究区平均形变量达-34.8 mm。在典型剖面上，随着海拔逐渐降低，冰川形变呈先缓慢减少，后快速增加，再缓慢减少的趋势，平均形变量为-50.1 mm。冰川碎屑流灾害发生前冰川形变已有明显的加速趋势，可为冰川灾害早期识别提供科学的数据支持。
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| 关 键 词： | Sentinel-1 SBAS-InSAR 冰川形变 色东普流域 坡向敏感性 |
| 收稿时间： | 2021-05-07 |
Glacier deformation inversion before disaster using SBAS-InSAR technology in Sedongpu basin along the Yarlung Zangbo River |
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| ZHU Bangyan,REN Zhizhong,ZHANG Qi,LI Yun,WANG Xiao.Glacier deformation inversion before disaster using SBAS-InSAR technology in Sedongpu basin along the Yarlung Zangbo River[J].Bulletin of Surveying and Mapping,2021,0(11):31-35. |
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| Authors: | ZHU Bangyan REN Zhizhong ZHANG Qi LI Yun WANG Xiao |
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| Institution: | 1. Nanjing Research Institute of Surveying, Mapping & Geotechnical Investigation Co., Ltd., Nanjing 210019, China;2. Guangzhou Changdi Spatial Information Technology Co., Ltd., Guangzhou 510663, China;3. School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang 222005, China |
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| Abstract: | Glacier deformation in Sedongpu basin from April 2018 to October 2018 is retrieved by SBAS-InSAR technology using 30 sentinel-1 SAR images. The inversion accuracy is verified with statistics in bedrock area and the RMSE is 9 mm. This shows that SBAS-InSAR technology has good reliability in glacier deformation monitoring.The sensibility of ascending and descending orbit data for deformation monitoring in different aspects is analyzed. Spatial distribution and temporal evolution characteristics of glacier deformation before the occurrence of glacier debris flow are analyzed. The main glacier movement is in the central axis along intersection of east and west aspects.The results shows that the average deformation of glacier area is -34.8 mm. On the typical section line, with the altitude decreasing, the glacier deformation decreases slowly at first, then increases rapidly, and then decreases slowly. Before the occurrence of glacial debris flow disaster, the glacier deformation had an obvious accelerating trend,which can provide scientific data support for early identification of glacier disaster. |
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| Keywords: | Sentinel-1 SBAS-InSAR glacier deformation Sedongpu basin sensitivity to aspect |
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