NDLI: Disaster monitoring and environmental alert in taiwan by repeat-pass spaceborne SAR

Content Provider	IEEE Xplore Digital Library
Author	Chih-Tien Wang, Kun-Shen Chen, Hong-Wei Lee, Jong-Sen Lee, Boerner, Wolfgang M. Ruei-Yuan Wang, Hong-Sen Wan,
Copyright Year	2007
Description	Author affiliation: NCU Center for Space and Remote Sensing Research, Jhongli, Taiwan (Chih-Tien Wang,; Kun-Shen Chen,; Hong-Wei Lee,; Jong-Sen Lee,; Boerner, Wolfgang M.; Ruei-Yuan Wang,; Hong-Sen Wan,)
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. Summary and remarks on the implementation of such multi-modal polarimetric and/or interferometric SAR imagery for environmental monitoring are provided.
Starting Page	2628
Ending Page	2631
File Size	1658894
Page Count	4
File Format	PDF
ISBN	9781424412112
DOI	10.1109/IGARSS.2007.4423384
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-23
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spaceborne radar Geology Hazards Terrain factors Remote monitoring Risk analysis Earthquakes Testing Extraterrestrial phenomena Satellites Flood extent Synthetic Aperture Radar (SAR) Interferometry Disaster Monitoring deformation
Content Type	Text
Resource Type	Article

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