Mapping land uplift and subsidence in the industrial parks in northern Taiwan by radar interferometry

NCUIR > College of Earth Sciences > Graduate Institute of Space Science > journal & Dissertation > Item 987654321/50451

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50451

Title:	Mapping land uplift and subsidence in the industrial parks in northern Taiwan by radar interferometry
Authors:	Wang,CT;Chen,KS;Hu,JC;Chang,WY;Boerner,WM
Contributors:	太空科學研究所
Keywords:	NORTHWESTERN TAIWAN;DEFORMATION;GROUNDWATER;TOPOGRAPHY;EARTHQUAKE;FIELD
Date:	2011
Issue Date:	2012-03-27 17:32:18 (UTC+8)
Publisher:	國立中央大學
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 observation especially difficult because of the high population density. In this article, we have investigated the land deformation in two adjacent industrial parks, Jhong-Li and Guei-Shan, in northern Taiwan using radar interferometry. The Interferometric Synthetic Aperture Radar technique for processing a series of data sets was first validated by comparison with ground levelling measurements over a test site. Excellent agreement was obtained in both deformation pattern and magnitude of subsidence rate. The period of observation dated from 1993 to 2000 with Synthetic Aperture Radar images from ERS-1 and ERS-2. The results, after least-squares adjustment, revealed that the maximum subsidence reached 10 cm and the subsidence rates were about 1.8 cm year-1 (at epicentres) since 1993 at both parks. It was also found that the subsidence rate slowed down after 1998 at Jhong-Li park while continuing at Guei-Shan park. This was strongly associated with local groundwater extraction activities.
Relation:	INTERNATIONAL JOURNAL OF REMOTE SENSING
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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