Study of subsidence monitoring in Nanjing City with small-baseline InSAR approach
| Autor: | Li Zhou, Guido Luzi, Chenxi Wang, Zhiwei Qiu, Tingchen Jiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Synthetic aperture radar
010504 meteorology & atmospheric sciences lcsh:Risk in industry. Risk management 0211 other engineering and technologies 02 engineering and technology 01 natural sciences short baseline subset lcsh:TD1-1066 Interferometric synthetic aperture radar Groundwater-related subsidence lcsh:Environmental technology. Sanitary engineering Baseline (configuration management) lcsh:Environmental sciences 021101 geological & geomatics engineering 0105 earth and related environmental sciences General Environmental Science surface subsidence lcsh:GE1-350 deformation field Subsidence (atmosphere) Geodesy lcsh:HD61 monitoring General Earth and Planetary Sciences Surface subsidence Geology |
| Zdroj: | Geomatics, Natural Hazards & Risk, Vol 10, Iss 1, Pp 1412-1424 (2019) GEOMATICS NATURAL HAZARDS & RISK r-CTTC: Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) instname |
| ISSN: | 1947-5713 1947-5705 |
| Popis: | The surface subsidence in Nanjing has become increasingly apparent because of the influence of geological conditions and the rapid progress of urbanization. Here, the theory of synthetic aperture radar interferometry is analysed, and a method based on the short baseline subset (SBAS) technology is proposed. The method can overcome time and baseline decorrelation and other factors, and it can extract points with high coherence from interferograms have short spatio-temporal baselines when the atmospheric delay phase and the noise phase in the frequency domain are used to differentiate the corresponding characteristics. The slow deformation ratio of the monitoring area over long periods can also be calculated by this method. In this study, the 16 advanced land observing satellite (ALOS) data acquired from 2007 to 2011 in Nanjing are processed by the SBAS technology and compared with levelling result. This work emphasizes that the SBAS technology could derive the cumulative deformations of surfaces and deformation fields accurately. |
| Databáze: | OpenAIRE |
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