Paper Info
Title
Disaster monitoring and environmental alert in taiwan by repeat-pass spaceborne SAR
Abstract
The prevailing complex geological and ecological conditions of Taiwan have drawn considerable attention from various geo-ecological communities because of their vulnerability to produce various natural hazards at different scales. Located in the tropical/subtropical zone of the Pacific Rim, its ecological and rugged mountainous properties are environmentally sensitive making monitoring and observations especially difficult because of the high population density. For example, in terms of natural hazard mitigation tectonically active regions are used for analyzing the cause of abundant risk events, such as earthquakes, landslides and land subsidence. In fact Taiwan is well suited as a test site for studying those geologically disastrous processes. Implementing novel techniques of space remote sensing has proved to be an effective means in recent years for greatly improving our understanding of these phenomena. In this paper we report on the monitoring of such events using multi-modal polarimetric and/or interferometric SAR images at C and L band from ERS, JERS-1, RADARSAT-1, ENVISAT, and from the recent ALOS satellite. For crustal and surface deformation, we used radar image pairs with long temporal baselines and large areas of coverage for investigating deformation over Western Taiwan. Pre-seismic and co-seismic deformation patterns are spatial-temporally analyzed. The other topic deals with the coastline changes observed from a sequence of ERS-1/2 SAR images within the years of 1996 to 2005. Waterlines were extracted using multi-scale procedures of edge detection and were corrected with tidal motion data. Substantial analyses were carried out in conjunction with ground surveys and lidar mapping. The topographic feature changes due to large scale landslides triggered by torrential rains were also monitored. In addition, the SAR interferograms were used to analyze the deposition changes along the riverbeds and riverbanks for short-intervals using optimal baselines. Su- mmary and remarks on the implementation of such multi-modal polarimetric and/or interferometric SAR imagery for environmental monitoring are provided.
Year
DOI
Venue
2007
10.1109/IGARSS.2007.4423384
IGARSS
Keywords
DocType
ISSN
flood extent,deformation,interferometry,disaster monitoring,synthetic aperture radar (sar),landslides,lidar mapping,land subsidence,geomorphology,pacific rim,satellites,remote sensing,synthetic aperture radar,population density,environmental monitoring,natural hazard,geology,radar imaging,risk analysis,hazards,testing,disasters,edge detection,remote monitoring,tectonics
Conference
2153-6996
ISBN
Citations 
PageRank 
978-1-4244-1212-9
2
0.51
References 
Authors
3
7
Name
Order
Citations
PageRank
Chih-Tien Wang141.24
Kun-Shan Chen2976148.62
Hong-Wei Lee320.84
Jong-Sen Lee42825567.12
Boerner, W.-M.511327.13
Ruei-Yuan Wang640.89
Hong-Sen Wan720.51