Application of persistent scatterer and small-baseline SAR interferometry in monitoring the surface deformation in the Choushui River Alluvial Fan of central Taiwan

Yi An Chen, Chung Pai Chang, Jiun Yee Yen

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Groundwater overexploitation has caused serious land subsidence in the Choushui River Alluvial Fan (CRAF) area of central Taiwan. Traditionally, the extent and magnitude of the surface subsidence was determined by precise-leveling, however, the cost and spatial and temporal density of the traditional survey prevent the understanding of the full extend of the effect. In this study we implement the Persistent Scatterer and Small-baseline SAR Interferometry, which provides much better spatial resolution, to investigate the surface deformation in CRAF where the water withdraw was serious since long time. Twenty-three radar images, acquired by the European radar satellite ENVISAT from June of 2004 to September of 2008, were used to analyze the surface deformation in the study area. From our results, the most serious subsidence areas are in the middle and distal fan of CRAF, the pass way of the Taiwan High Speed Rail, where the maximum deformation rate is nearly 7 cm/yr along the radar Line-Of-Sight direction. Moreover, it also reveals an obvious subsidence zone in the coastal industrial area of Yunlin with different deformation trend from north to south. Finally we compare our results with the precise-leveling data, the continue GPS data and groundwater level data within the region. It illustrates that the surface deformation in CRAF is related to the seasonal fluctuation of groundwater, which are the high deformation rate in dry season and the low deformation rate in wet season.

原文???core.languages.en_GB???
主出版物標題32nd Asian Conference on Remote Sensing 2011, ACRS 2011
頁面2119-2124
頁數6
出版狀態已出版 - 2011
事件32nd Asian Conference on Remote Sensing 2011, ACRS 2011 - Tapei, Taiwan
持續時間: 3 10月 20117 10月 2011

出版系列

名字32nd Asian Conference on Remote Sensing 2011, ACRS 2011
3

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???event.eventtypes.event.conference???32nd Asian Conference on Remote Sensing 2011, ACRS 2011
國家/地區Taiwan
城市Tapei
期間3/10/117/10/11

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