Reclaimed lands contributed a considerable amount of developable space in Hong Kong. A good understanding of surface deformation on these platforms is of great significance towards a proper use of them. Deformation monitoring helps to analyze stability conditions of built facilities and, for newly reclaimed platforms, to evaluate if a desired settlement rate is reached for follow-up civil works. This paper presents two representative multi-temporal synthetic aperture radar interferometry (MTInSAR) techniques, namely the persistent scatterer interferometry (PSI) and small baseline subsets (SBAS), to monitor ground motion over two typical reclamation sites in Hong Kong. The PSI was applied to the good-coherence case of Hong Kong International Airport (HKIA) and SBAS to the low-coherence case of undeveloped Penny's Bay Reclamation Stage 2 (PBR2). Effectiveness of the MTInSAR techniques was fairly presented by deformation maps from X-band CosmoSkyMed images. Exceeding 50 mm/y subsiding was detected during 2014 and 2015 over PBR2 while a smaller 20 mm/y subsiding was found during 2013 and 2016 in the airport north taxiway.
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机译：填海造地为香港创造了可开发的空间。正确理解这些平台上的表面变形对于正确使用它们具有重要意义。变形监测有助于分析建筑设施的稳定性条件，对于新回收的平台，有助于评估后续土建工程是否达到理想的沉降速率。本文介绍了两种代表性的多时相合成孔径雷达干涉测量技术（MTInSAR），即持续散射散射干涉测量技术（PSI）和小基线子集（SBAS），用于监视香港两个典型填海区的地面运动。 PSI适用于香港国际机场（HKIA）的高一致性案例，SBAS适用于未开发的Penny's Bay Reclamation Stage 2（PBR2）的低一致性案例。 X波段CosmoSkyMed图像的变形图充分体现了MTInSAR技术的有效性。在2014年和2015年期间，在PBR2上发现了超过50 mm / y的沉降，而在机场北滑行道上，在2013年和2016年发现了较小的20 mm / y沉降。
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