期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep43351
关键词
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资金
- National Natural Science Foundation of China [41504004]
- National Science Foundation for Postdoctoral Scientists of China [2015M570722, 2016T90800]
- Shenzhen Scientific Research and Development Funding Program [SGLH20150206152559032]
- Shenzhen Future Industry Development Funding program [201507211219247860]
- Open Fund of Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Land and Resources [KF-2016-02-002]
- State Key Laboratory of Earthquake Dynamics [LED2013A02, LED2016B03]
The time-series topography change of a landfill site before its failure has rarely been surveyed in detail. However, this information is important for both landfill management and early warning of landslides. Here, we take the 2015 Shenzhen landslide as an example, and we use the radar shape-from-shading (SFS) technique to retrieve time-series digital elevation models of the landfill. The results suggest that the total filling volume reached 4,074,300 m(3) in the one and a half years before the landslide, while 2,817,400 m3 slid down in the accident. Meanwhile, the landfill rate in most areas exceeded 2 m/month, which is the empirical upper threshold in landfill engineering. Using topography captured on December 12, 2015, the slope safety analysis gives a factor of safety of 0.932, suggesting that this slope was already hazardous before the landslide. We conclude that the synthetic aperture radar ( SAR) SFS technique has the potential to contribute to landfill failure monitoring.gbv
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