Observing Dam’s Movements with Spaceborne SAR Interferometry

Lázecký, Milan; Perissin, Daniele; Wang, Zhiying; Ling, Lei; Qin, Yulin

doi:10.1007/978-3-319-09048-1_26

Cited by 12 publications

(19 citation statements)

References 6 publications

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“…InSAR measures surface displacement by differencing the phase observations between two complex radar images, and the resulting difference phase creates a new type of image called an interferogram. Few studies have focused on using InSAR to map displacement of dam bodies and/or reservoir slopes [12][13][14][15], and high CFRDs have not been investigated yet. In this study, we aim to use spaceborne InSAR data to investigate the spatial and temporal changes of the SBY Dam, and to compare with the in-situ measurements.…”

Section: Introductionmentioning

confidence: 99%

Remote Sensing of Deformation of a High Concrete-Faced Rockfill Dam Using InSAR: A Study of the Shuibuya Dam, China

Zhou

et al. 2016

Remote Sensing

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Settlement is one of the most important deformation characteristics of high concrete faced rockfill dams (CFRDs, >100 m). High CFRDs safety would pose a great threat to the security of people's lives and property downstream if this kind of deformation were not to be measured correctly, as traditional monitoring approaches have limitations in terms of durability, coverage, and efficiency. It has become urgent to develop new monitoring techniques to complement or replace traditional monitoring approaches for monitoring the safety and operation status of high CFRDs. This study examines the Shuibuya Dam (up to 233.5 m in height) in China, which is currently the highest CFRD in the world. We used space-borne Interferometric Synthetic Aperture Radar (InSAR) time series to monitor the surface deformation of the Shuibuya Dam. Twenty-one ALOS PALSAR images that span the period from 28 February 2007 to 11 March 2011 were used to map the spatial and temporal deformation of the dam. A high correlation of 0.93 between the InSAR and the in-situ monitoring results confirmed the reliability of the InSAR method; the deformation history derived from InSAR is also consistent with the in-situ settlement monitoring system. In addition, the InSAR results allow continuous investigation of dam deformation over a wide area that includes the entire dam surface as well as the surrounding area, offering a clear picture continuously of the dam deformation.

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Section: Introductionmentioning

confidence: 99%

Remote Sensing of Deformation of a High Concrete-Faced Rockfill Dam Using InSAR: A Study of the Shuibuya Dam, China

Zhou

et al. 2016

Remote Sensing

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“…The dam is affected by very shallow but continuous subsidence almost homogeneously throughout its body (with higher rate on the side to the reservoir) and by higher rate of movements corresponding to water level changes, at the sides of the dam. Residual phase show correlation also with tidal changes of bay surrounding the dam -this component is however minor [6]. …”

Section: Case Studies Of Damsmentioning

confidence: 90%

“…(9) (1) IT4Innovations, VSB-TU Ostrava, 17. listopadu 15, 708 00 Ostrava-Poruba, Czech Republic, Email: milan.lazecky@vsb.cz, petr.rapant@vsb.cz (2) Universidade (6) Czech Technical University in Prague, Faculty of Civil Engineering, Thakurova 7,166 29 Praha 6, Czech Republic, Email: hlavacova@insar.cz (7) Research Unit for Inland Development, Polytechnic Institute of Guarda, Av. Dr. Francisco Sa Carneiro nº50, 6300-559 Guarda, Portugal, Email: gpatricio@ipg.pt (8) Departamento …”

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confidence: 99%

Potential of Multi-temporal InSAR Techniques for Structural Health Monitoring

Lázecký¹,

Bakoň²,

Sousa³

et al. 2015

Proceedings of Fringe 2015: Advances in the Science and Applications of SAR Interferometry and Sentinel-1 InSAR Workshop

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In this paper it is clearly demonstrated that InSAR techniques may be particularly useful as a hot spot indicator of relative structures deformation over large areas, making it possible to develop interferometric based methodologies for SHM. Different case studies from structural health monitoring of buildings, bridges and highways and dams in Slovakia, Czech Republic, Hong Kong and Portugal processed within the scope of "RemotWatch -Alert and Monitoring System for Physical Structures" project using non-linear and other SHM-optimized algorithms of SARPROZ software, are reported. For the future investigation it is expected, that due to the faster product delivery of new missions (e.g. SENTINEL-1), it will be possible to deliver new workflows suitable for near-real time analysis aimed to better understanding of the deformation characteristics of the structures in urban and extra urban areas, important for structure stability and risk management applications.

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“…PSI is a reliable method because it allows detection of Earth's surface displacements over time by using multiple SAR images acquired over the same area [7]. It has gained great popularity for deformation measurement of man-made structures such as dams [1,8,57,58] and open pit mine [59]. It extracts information from the pixels of SAR scenes that are consistent over long time intervals [4,[60][61][62].…”

Section: Pre-processing Work and Persistent Scatterer Interferometry mentioning

confidence: 99%

Application of DInSAR-PSI Technology for Deformation Monitoring of the Mosul Dam, Iraq

Othman¹,

Al-Maamar²,

Ali

et al. 2019

Remote Sensing

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On-going monitoring of deformation of dams is critical to assure their safe and efficient operation. Traditional monitoring methods, based on in-situ sensors measurements on the dam, have some limitations in spatial coverage, observation frequency, and cost. This paper describes the potential use of Synthetic Aperture Radar (SAR) scenes from Sentinel-1A for characterizing deformations at the Mosul Dam (MD) in NW Iraq. Seventy-eight Single Look Complex (SLC) scenes in ascending geometry from the Sentinel-1A scenes, acquired from 03 October 2014 to 27 June 2019, and 96 points within the MD structure, were selected to determine the deformation rate using persistent scatterer interferometry (PSI). Maximum deformation velocity was found to be about 7.4 mm·yr−1 at a longitudinal subsidence area extending over a length of 222 m along the dam axis. The mean subsidence velocity in this area is about 6.27 mm·yr−1 and lies in the center of MD. Subsidence rate shows an inverse relationship with the reservoir water level. It also shows a strong correlation with grouting episodes. Variations in the deformation rate within the same year are most probably due to increased hydrostatic stress which was caused by water storage in the dam that resulted in an increase in solubility of gypsum beds, creating voids and localized collapses underneath the dam. PSI information derived from Sentinel-1A proved to be a good tool for monitoring dam deformation with good accuracy, yielding results that can be used in engineering applications and also risk management.

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Observing Dam’s Movements with Spaceborne SAR Interferometry

Cited by 12 publications

References 6 publications

Remote Sensing of Deformation of a High Concrete-Faced Rockfill Dam Using InSAR: A Study of the Shuibuya Dam, China

Remote Sensing of Deformation of a High Concrete-Faced Rockfill Dam Using InSAR: A Study of the Shuibuya Dam, China

Potential of Multi-temporal InSAR Techniques for Structural Health Monitoring

Application of DInSAR-PSI Technology for Deformation Monitoring of the Mosul Dam, Iraq

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