气候变化领域集成服务门户(CCPortal): Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study

CCPortal

DOI	10.1007/s11069-020-04118-1
	Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study
	Liu S.-P.; Shi B.; Gu K.; Zhang C.-C.; Yang J.-L.; Zhang S.; Yang P.
发表日期	2020
ISSN	0921030X
起始页码	3043
结束页码	3061
卷号	103 期号:3
英文摘要	A number of coastal areas have been suffering from severe land subsidence, which draws worldwide attention. Quantifying the subsidence and the contribution of each compacting stratum is crucial to study its development mechanism. In this paper, the distributed fiber optic sensing (DFOS) technique based on Brillouin scattering was adopted to monitor land subsidence in a 100-m-deep borehole located in Tianjin, China. Vertical strain profile was obtained by a kind of fixed-point cable embedded in the borehole, and the DFOS-based land subsidence system successfully achieved a 2-year-period in-situ investigation of the soft soil. The results revealed that the land subsidence rate was 21.6 mm/a after 2017, and the strata deformation measurements were refined up to each 5-m-thickness in vertical direction. The compression strata were localized at shallow strata (3.4–38.4 m), and the dominant contributors were soft soil strata at depth of 3.4 m to 18.4 m that the contribution of every 5 m thick stratum from top to bottom was 34.4%, 27% and 19.1%, respectively. The subsidence and strata contribution obtained by DFOS were in good agreement with those of extensometers. The groundwater fluctuations and additional loading may be the significant triggering factors of the compaction of the soft soil. This study showed that the DFOS-based measurement is an effective approach for land subsidence monitoring and will be a supplement to existing techniques in coastal areas. © 2020, Springer Nature B.V.
关键词	Coastal areas DFOS Land subsidence Quantitative assessment Tianjin
英文关键词	coastal zone; compression; deformation; optical method; soft soil; subsidence; China; Tianjin
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205801
作者单位	School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210023, China; School of Civil Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom; Tianjin Center, China Geological Survey, Tianjin, 300170, China
推荐引用方式 GB/T 7714	Liu S.-P.,Shi B.,Gu K.,et al. Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study[J],2020,103(3).
APA	Liu S.-P..,Shi B..,Gu K..,Zhang C.-C..,Yang J.-L..,...&Yang P..(2020).Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study.Natural Hazards,103(3).
MLA	Liu S.-P.,et al."Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study".Natural Hazards 103.3(2020).