TerraSAR-X data for high-precision land subsidence monitoring: A case study in the historical centre of Hanoi, Vietnam

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題名:	TerraSAR-X data for high-precision land subsidence monitoring: A case study in the historical centre of Hanoi, Vietnam
作者:	張中白;Le, Tuan;Chang, Chung-Pai;Nguyen, Xuan;Yhokha, Akano
貢獻者:	太空及遙測研究中心
關鍵詞:	heritage culture assets;Historical Centre of Hanoi;land subsidence;small baseline interferometry;synthetic aperture radar;TerraSAR-X
日期:	2016-01-01
上傳時間:	2026-04-21 14:37:51 (UTC+8)
出版者:	MDPI Multidisciplinary Digital Publishing Institute;MDPI AG
摘要:	摘要： In this study, subsidence patterns in the Historical Centre of Hanoi, Vietnam are mapped using the Interferometric Synthetic Aperture Radar (InSAR) technique, with particular emphasis on the stability of ancient monuments, historical buildings and archaeological sectors. Due to the small and scattered characteristics of these structures, not only is a comprehensive coverage of radar targets needed, but also the details of a single building or monument. We took advantage of the high-resolution TerraSAR-X imagery with the aid of oversampling implementation on the Small Baseline (SB) InSAR approach to reveal the subsidence patterns. A total of 6.29 million radar targets were obtained, maintaining the average density of 217,012 points/km2. Our results suggest that image oversampling not only increased the number of measurement points 4.4 times more than the standard processing chain, but also removed some of the noisiest points. The observed subsidence patterns are mostly related to adjacent groundwater extraction and construction activities, with maximum subsiding rate reaching −18.1 mm/year for the study period April 2012 to November 2013. Generally, heritage assets and monuments in the Citadel, the Old Quarter and French Quarter remain in a steady state, whereas those located along the Red River and in southern Hanoi are subject to subsidence. 出版者： MDPI AG 出版日期： 2016-04-01 出處： Remote sensing (Basel, Switzerland), 2016-04, Vol.8 (4), p.338 資源來源： ProQuest Open Access Content Collection 識別號： ISSN: 2072-4292 識別號： EISSN: 2072-4292 識別號： DOI: 10.3390/rs8040338
顯示於類別:	[太空及遙測研究中心] 期刊論文

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