Magnetic signature of Siaolin Village, southern Taiwan, after burial by a catastrophic landslide due to Typhoon Morakot

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50576

Title:	Magnetic signature of Siaolin Village, southern Taiwan, after burial by a catastrophic landslide due to Typhoon Morakot
Authors:	Doo,WB;Hsu,SK;Chen,CC;Hsieh,HH;Yen,HY;Chen,YG;Chang,WY
Contributors:	地球物理研究所
Keywords:	POLYGONAL CROSS-SECTION;ANALYTIC-SIGNAL;BOUNDARIES;ANOMALIES;BODIES
Date:	2011
Issue Date:	2012-03-27 17:37:06 (UTC+8)
Publisher:	國立中央大學
Abstract:	Typhoon Morakot caused terrible flooding and torrential rains that severely damaged southern Taiwan. Swollen rivers wiped out roads and demolished buildings. Long-lasting and intense rainfall triggered landslides in many regions in southern Taiwan, including the landslide that buried Siaolin Village in Kaohsiung County and killed approximately 500 people. Locating buried buildings immediately after a landslide could be an emergent issue in life saving and hazard mitigation. Analyzing the magnetic signature of a buried area is an efficient and non-destructive way to detect subsurface buildings. This paper presents the results of a magnetic survey for the purpose of outlining subsurface images of Siaolin Village after the catastrophic landslide induced by Typhoon Morakot in 2009. We found that a high-resolution magnetic survey can reveal suspected building positions that match the initial locations of buildings in Siaolin Village. The estimated depths of the buried buildings are 5-10 m deep. The magnetic data further suggest a possible debris-flow direction of NE to SW because the northern part of the village was mostly destroyed, while buildings in the southern part of the village remained in place.
Relation:	NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
Appears in Collections:	[Graduate Institute of Geophysics] journal & Dissertation

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