Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study

Liu, Suping; Shi, Bin; Gu, Kai; Zhang, Chengcheng; Yang, Jilong; Zhang, Song; Yang, Ping

doi:10.1007/s11069-020-04118-1

Cited by 20 publications

(11 citation statements)

References 33 publications

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“…Given the preceding, numerous efforts are being made to monitor ground deformation during underground mining and groundwater exploitation. Land subsidence was initially monitored primarily through well observations [74,75], extensometers [76,77], fiber optics sensing [78,79], levelling [80,81] and GNSS [82,83]. Although ground-based monitoring allows for high accuracy in measuring land surface deformation in a small area, due to low spatial resolution and high cost, providing a more detailed map of ground deformation at a regional scale is difficult.…”

Section: Introductionmentioning

confidence: 99%

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Guzy

Witkowski

2021

Energies

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Land subsidence caused by groundwater withdrawal induced by mining is a relatively unknown phenomenon. This is primarily due to the small scale of such movements compared to the land subsidence caused by deposit extraction. Nonetheless, the environmental impact of drainage-related land subsidence remains underestimated. The research was carried out in the “Bogdanka” coal mine in Poland. First, the historical impact of mining on land subsidence and groundwater head changes was investigated. The outcomes of these studies were used to construct the influence method model. With field data, our model was successfully calibrated and validated. Finally, it was used for land subsidence estimation for 2030. As per the findings, the field of mining exploitation has the greatest land subsidence. In 2014, the maximum value of the phenomenon was 0.313 cm. However, this value will reach 0.364 m by 2030. The spatial extent of land subsidence caused by mining-induced drainage extends up to 20 km beyond the mining area’s boundaries. The presented model provided land subsidence patterns without the need for a complex numerical subsidence model. As a result, the method presented can be effectively used for land subsidence regulation plans considering the impact of mining on the aquifer system.

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Section: Introductionmentioning

confidence: 99%

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Guzy

Witkowski

2021

Energies

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“…DSS adopts a strain-sensing fiber-optic cable to determine the strain profile along the entire length, which can be used to quantify the deformation of strata or infrastructures. The feasibility of DSS for subsurface deformation monitoring in boreholes has been illustrated in previous studies (Gu et al 2018;Kokubo et al 2015;Liu et al 2019;Liu et al 2020;Wu et al 2015;Zhang et al 2018). More recently, the utilization of micro-anchored cables significantly improved the quality of fiber-optic measurements in the near-surface (Zhang et al 2021a).…”

Section: Introductionmentioning

confidence: 84%

“…The others belong to the manual survey techniques, so the in-situ measurement and the data storage are conducted manually. Usually, the fixed and low sampling frequencies are the apparent features, and the sampling frequencies of the DSS technique may range from 3 to 5 months in the long-term monitoring (Liu et al 2019;Liu et al 2020).…”

Section: Uwfbg-based Strain Measurementmentioning

confidence: 99%

“…Recently, the emerging fiber-optic sensing technologies show the potential in borehole-based distributed strain sensing, which contributes to identifying the hotspots of subsurface deformation. For example, Liu et al (2019) and Liu et al (2020) deployed the DSS cables into boreholes to capture the strata strain response to the groundwater fluctuations and high buildings at 3-5 months intervals in Lianyungang and Tianjin, China, respectively, and investigated the land subsidence mechanisms. Herein, the UWFBGs technique supplements the DSS technique that allows real-time remote strain measurement.…”

Section: Prospect On Fiber-optic Wireless Sensor Networkmentioning

confidence: 99%

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Fiber-optic wireless sensor network using ultra-weak fiber Bragg gratings for vertical subsurface deformation monitoring

Liu

Shi

et al. 2021

Nat Hazards

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The determination of subsurface deformation is critical to understanding the subsurface dynamic processes, but most of conventional monitoring methods still have challenges in remotely obtaining detailed data. Herein, a novel fiber-optic wireless sensor network using the ultra-weak fiber Bragg gratings technique was proposed. It allows real-time remote capture of subsurface deformation along the fiber-optic cables. Such a fiber-optic measurement system was employed in a borehole to a depth of 340 m in Cangzhou, China. Strain profiles were measured monthly with a spatial resolution of 5 m and strain resolution of 1 µε, and the development of all strata deformation in the aquifer systems was calculated from January 2019 to December 2019. It turns out that the subsidence rate in this area is approximate 9 mm/a, which agrees well with the result of extensometer measurements. The significant strata compaction in the second aquifer and the third aquitard rapidly increased from May 2019 to July 2019, which could be attributed to the decline in groundwater. It is concluded that the fiber-optic wireless sensor network accurately captures subsurface deformation development and helps to better elucidate the subsurface deformation mechanism and provide solutions for the prevention and mitigation.

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“…In recent years, the optical fiber sensing technology has shown its advantages in geological hazard monitoring and early warning [67,72,73]. The monitoring technology has been successfully applied to monitoring geological hazards such as landslides, ground collapse, ground subsidence, and ground fissures [21,[74][75][76][77][78][79][80][81]. In geological hazard monitoring, deformation of rock and soil mass and water distribution are two very important monitoring contents.…”

Section: Applications To Geo-hazards Monitoringmentioning

confidence: 99%

DFOS Applications to Geo-Engineering Monitoring

et al. 2021

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Optical fiber sensing technology has developed rapidly since the 1980s with the development of the optical fiber and fiber optical communication technology. It is a new type of sensing technology that uses light as a carrier and optical fiber as a medium to sense and transmit external signals (measurands). Distributed fiber optical sensors (DFOS) can continuously measure the external physical parameters distributed along the geometric path of the optical fiber. Meanwhile, the spatial distribution and change information of the measured physical parameters over time can be obtained. This technology has unmatched advantages over traditional point-wise and electrical measurement monitoring technologies. This paper summarizes the state-of-the-art research of the application of the distributed optical fiber sensing technology in geo-engineering in the past 10 years, mainly including the advantages of DFOS, the challenges in geo-engineering monitoring, related fundamental theoretical issues, sensing performance of the optical sensing cables, distributed optical fiber monitoring system for geo-engineering, and applications of optical fiber sensing technology in geo-engineering.

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Land subsidence monitoring in sinking coastal areas using distributed fiber optic sensing: a case study

Cited by 20 publications

References 33 publications

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Land Subsidence Estimation for Aquifer Drainage Induced by Underground Mining

Fiber-optic wireless sensor network using ultra-weak fiber Bragg gratings for vertical subsurface deformation monitoring

DFOS Applications to Geo-Engineering Monitoring

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