| Author: | Wei, Zhiqi |
| Title: | Estimating the magma activity of Changbaishan volcano with PALSAR data |
| Advisors: | Zhang, Lei (LSGI) |
| Degree: | M.Sc. |
| Year: | 2017 |
| Subject: | Synthetic aperture radar -- Changbai Shan (China and Korea) Volcanoes -- Changbai Mountains (China and Korea) Hong Kong Polytechnic University -- Dissertations |
| Department: | Faculty of Construction and Environment Department of Land Surveying and Geo-Informatics |
| Pages: | vi, 69 pages : color illustrations |
| Language: | English |
| Abstract: | Monitoring the deformation of volcanic region is of great significance for understanding volcano activity, therefore, reducing the related geological hazards. In recent years, interferometric synthetic aperture radar (InSAR) has been widely applied to this end, especially thanks to the prompt evolution of multi-temporal InSAR (MTInSAR) algorithms. In this paper, temporarily-coherent point InSAR (TCPInSAR), a recently-developed MTInSAR technique, is employed to investigate the surface deformation in Changbaishan volcanic area, Jilin province, China, with 22 PALSAR images. Compared to other MTInSAR techniques, TCPInSAR can work well with a small amount of data and is immune to unwrapping errors. Furthermore, the severe orbital ramps emanated from the inaccurate determination of the ALOS satellite's state vector can be jointly estimated by TCPInSAR, resulting in an exhaustive separation between the orbital errors and displacement signals. The TCP-InSAR deformation rate map indicates that the surface deformation of Changbaishan volcano was small from 2006 to 2011 and the volcano activity was weak. The TCP-InSAR cumulative deformation map shows that the deformation presents different characteristic at different time. And we get that the geological environment and climatic factors together contribute to the surface deformation of Changbaishan volcanic region. This research provides the basic data for studying the eruption mechanism of Tianchi volcano. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022385849703411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.18 MB | Adobe PDF | View/Open |
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