<i>Guide to Risk Assessment for Reservoir Safety Management</i> – erratum

Wallis, M.; Brown, Alan

doi:10.1680/dare.14.00004

Cited by 6 publications

(2 citation statements)

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“…Dams need to be adjusted to changing conditions in order to supply water and energy. Given that dams are a vital infrastructure, the effects of their collapse can be severe in terms of both economic and societal consequences [4,5]. The analysis of risk factors and the assessment of the risk of failure of tailings dams represent the initial steps in the management of the risk of failure of such dams.…”

Section: Introductionmentioning

confidence: 99%

Deformation Risk Assessment of the Lar Dam: Monitoring Its Stability Condition

Ghadimi,

Kiani

2024

Sustainability

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Dam stability is one of the most essential geotechnical engineering challenges. Studying the structural behavior of dams during their useful life is an essential component of their safety. Terrestrial surveying network approaches are typically expensive and time-consuming. Over the last decade, the interferometric synthetic aperture radar (InSAR) method has been widely used to monitor millimeter displacements in dam crests. This research investigates the structural monitoring of the Lar Dam in Iran, using InSAR and the terrestrial surveying network technique to identify the possible failure risk of the dam. Sentinel-1A images taken from 5 February 2015 to 30 September 2019 and TerraSAR-X (09.05.2018 to 16.08.2018) images were analyzed to investigate the dam’s behavior. The InSAR results were compared with those of the terrestrial surveying network for the period of 1992 to 2019. The Sentinel-1 results implied that the dam on the left side moved over 8 mm/yr. However, the pillars to the left abutment indicated an uplift, which is consistent with the TerraSAR-X results. Also, the TerraSAR-X data indicated an 8 mm displacement over a three-month period. The terrestrial surveying showed that the largest uplift was 19.68 mm at the TB4 point on the left side and upstream of the body, while this amount was 10 mm in the interferometry analysis for the period of 2015–2020. The subsidence rate increased from the middle part toward the left abutment. The geological observations made during the ninth stage of the terrestrial surveying network indicate that there was horizontal and vertical movement over time, from 1992 to 2019. However, the results of the InSAR processing in the crown were similar to those of the terrestrial surveying network. Although different comparisons were used for the measurements, the difference in the displacement rates was reasonable, but all three methods showed the same trend in terms of uplift and displacement.

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Section: Introductionmentioning

confidence: 99%

Deformation Risk Assessment of the Lar Dam: Monitoring Its Stability Condition

Ghadimi,

Kiani

2024

Sustainability

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“…Dams are critical infrastructures, and their failure has high economic and social consequences, although usually very low, there exist related risks that must be properly managed in a continuously updated process (ICOLD, 2003;Fluixá-Sanmartín et al, 2018). The rapid changes in the factors leading to dam risks may make traditional monitoring programs no longer suitable for long-term safety management of dams (Bowles et al, 2013;USBR, 2016;USACE, 2016).…”

Section: Introductionmentioning

confidence: 99%

Monitoring embankment dams from space using satellite radar interferometry: Case studies from RemoDams project

Ruiz-Armenteros

Blasco

Bakoň

et al. 2022

Proceedings of the 5th Joint International Symposium on Deformation Monitoring - JISDM 2022

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The monitoring procedures with different geotechnical/structural sensors and classical geodetic techniques including GNSS are the usual practices in most of the dams where these controls are established. Other geomatic techniques such as TLS, GB-SAR and multi-temporal InSAR (MT-InSAR), allow the determination of 3D displacements with the advantage of covering a large number of control points. In particular, MT-InSAR techniques enable the detection of displacements at a very low cost compared to other techniques, and without the need for field work or the installation of special equipment. In addition, they can provide a single source of information on the stability of the dam when monitoring programs are not carried out due to lack of funding, resources or other reasons. These techniques provide measurement uncertainties of the order of 1 mm/year, interpreting time series of interferometric phases of coherent reflectors present in the area, called Persistent Scatterers. In this work, we present the adaptation and application of MT-InSAR techniques to monitor embankment dams, obtaining vertical displacements, characterizing their consolidation rates, and allowing the identification of potential problems surrounding the reservoir that require further field investigation. This study is part of the ReMoDams project, a Spanish research initiative developed for monitoring dam structural stability from space using satellite radar interferometry.

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