Monitoring Land Subsidence in Sacramento Valley, California, Using GPS

Blodgett, J.C.; Ikehara, M.E.; Williams, Gary E.

doi:10.1061/(asce)0733-9453(1990)116:2(112)

Cited by 14 publications

(2 citation statements)

References 7 publications

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“…But, due to their discrete point monitoring, it is very difficult to provide a continuous ground deformation in the complex geological environment. The vertical control network based on Global Positioning System (GPS) also was used to monitor ground deformation for decades [3][4][5]. This system can collect data automatically to provide large area of ground deformation, but, also, its results are easily affected by the buildings and crops on surface.…”

Section: Introductionmentioning

confidence: 99%

Application of Distributed Optical Fiber Sensing Technique in Monitoring the Ground Deformation

et al. 2017

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The monitoring of ground deformation is important for the prevention and control of geological disaster including land subsidence, ground fissure, surface collapse, and landslides. In this study, a distributed optical fiber sensing technique based on Brillouin Optical Time-Domain Analysis (BOTDA) was used to monitor the ground deformation. The principle behind the BOTDA is first introduced, and then laboratory calibration test and physical model test were carried out. Finally, BOTDA-based monitoring of ground fissure was carried out in a test site. Experimental results show that the distributed optical fiber can measure the soil strain during ground deformation process, and the strain curve responded to the soil compression and tension region clearly. During field test in Wuxi City, China, the ground fissures deformation area was monitored accurately and the trend of deformation can also be achieved to forecast and warn against the ground fissure hazards.

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Section: Introductionmentioning

confidence: 99%

Application of Distributed Optical Fiber Sensing Technique in Monitoring the Ground Deformation

et al. 2017

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“…Ground deformation is one of the most important physical measurement quantities for monitoring and predicting geological disasters. Sensing technology is mainly used to monitor ground deformation, including draw-wire displacement sensor technology [1,2], global positioning system (GPS) technology [3,4], total station observation technique [5], remote sensing technique [6,7,8], synthetic aperture radar (SAR) technology [4,9], laser scanning technology [10], optical fiber sensing technology [11,12,13,14,15], and time–domain reflectometry (TDR) technology [16,17].…”

Section: Introductionmentioning

confidence: 99%

Using a Parallel Helical Sensing Cable for the Distributed Measurement of Ground Deformation

Tong

Wang

et al. 2019

Sensors

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Surface and underground stretched deformation is one of the most important physical measurement quantities for geological-disaster monitoring. In this study, a parallel helical sensing cable (PHSC) based on the time–domain reflectometry (TDR) technique is proposed and used to monitor large ground stretched deformation. First, the PHSC structure and manufacturing process are introduced, and then, distributed capacitance, distributed inductance, and characteristic impedance were derived based on the proposed stretched-structure model. Next, the relationship between characteristic impedance and stretched deformation was found, and the principle of distributed deformation measurement based on the TDR technique and PHSC characteristic impedance was analyzed in detail. The function of the stretched deformation and characteristic impedance was obtained by curve fitting based on the theoretically calculated results. A laboratory calibration test was carried out by the designed tensile test platform. The results of multi-point positioning and the amount of stretched deformation are presented by the tensile test platform, multi-point positioning measurement absolute errors were less than 0.01 m, and the amount of stretched deformation measurement absolute errors were less than 3 mm, respectively. The measured results are in good agreement with the theoretically calculated results, which verify the correctness of theoretical derivation and show that a PHSC is very suitable for the distributed measurement of the ground stretched deformation.

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GNSS Geodesy in Geophysics, Natural Hazards, Climate, and the Environment

Bock

Wdowinski

2020

Position, Navigation, and Timing Technologies in the 21st Century

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Monitoring Land Subsidence in Sacramento Valley, California, Using GPS

Cited by 14 publications

References 7 publications

Application of Distributed Optical Fiber Sensing Technique in Monitoring the Ground Deformation

Application of Distributed Optical Fiber Sensing Technique in Monitoring the Ground Deformation

Using a Parallel Helical Sensing Cable for the Distributed Measurement of Ground Deformation

GNSS Geodesy in Geophysics, Natural Hazards, Climate, and the Environment

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