Geo-Hazard Detection and Monitoring Using SAR and Optical Images in a Snow-Covered Area: The Menyuan (China) Test Site

被引：7

作者：

Huang, Qihuan ^{[1
]}

Wang, Yian ^{[1
]}

Xu, Jia ^{[1
]}

Nishyirimbere, Angelique ^{[1
]}

Li, Zhimin ^{[2
]}

机构：

[1] Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Jiangsu, Peoples R China

[2] Earthquake Adm Qinghai Prov, Xining 810001, Qinghai, Peoples R China

来源：

ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION | 2017年 / 6卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Menyuan M-S 6.4 earthquake; SAR interferometry; Sentinel-1; Gaofen-1; satellite; geo-hazards; PERSISTENT SCATTERER INTERFEROMETRY; LANDSLIDE; RADAR; EARTHQUAKE;

D O I：

10.3390/ijgi6100293

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this work, we combine SAR and optical images for geo-hazard detection and monitoring in Western China. An extremely small baseline of C-band SAR image pairs acquired from Sentinel-1A at Menyuan, China, is analyzed. Apart from the large area of coseismal deformation, we proposed an earthquake-derived landslide detecting method by removing the coseismal deformation with polynomial fitting, then the detected moving areas were confirmed with Chinese Gaofen-1 optical satellite images. Sentinel-1A C-band interferograms show about a 7-cm line of sight movement caused by the M-S 6.4 Menyuan earthquake; meanwhile, several features indicative of ground movement were detected by the proposed method and demonstrated by the Gaofen-1 optical images; the interpretation of high-resolution optical data complemented the goal of better understanding the behavior of geo-hazard disasters. InSAR time series analysis provides an opportunity for continuous monitoring of geo-hazards in remote areas, while the optical image method is easily affected by decorrelation due to snowfall.

引用

页数：11