Seismic risk ranking for large dams in South Africa

Singh, Mayshree; Kijko, Andrzej; Berg, Leo van den

doi:10.2478/s11600-010-0044-3

Cited by 8 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The original TRF method for earthquake risk analysis is expressed as [8][9][10][11][12][13][14][15] TRF = [(CRF + HRF + ARF) + DHF] × PDF.…”

Section: Methodsmentioning

confidence: 99%

The Total Risk Analysis of Large Dams under Flood Hazards

Chen¹,

Lin²

2018

Water

View full text Add to dashboard Cite

Dams and reservoirs are useful systems in water conservancy projects; however, they also pose a high-risk potential for large downstream areas. Flood, as the driving force of dam overtopping, is the main cause of dam failure. Dam floods and their risks are of interest to researchers and managers. In hydraulic engineering, there is a growing tendency to evaluate dam flood risk based on statistical and probabilistic methods that are unsuitable for the situations with rare historical data or low flood probability, so a more reasonable dam flood risk analysis method with fewer application restrictions is needed. Therefore, different from previous studies, this study develops a flood risk analysis method for large dams based on the concept of total risk factor (TRF) used initially in dam seismic risk analysis. The proposed method is not affected by the adequacy of historical data or the low probability of flood and is capable of analyzing the dam structure influence, the flood vulnerability of the dam site, and downstream risk as well as estimating the TRF of each dam and assigning corresponding risk classes to each dam. Application to large dams in the Dadu River Basin, Southwestern China, demonstrates that the proposed method provides quick risk estimation and comparison, which can help local management officials perform more detailed dam safety evaluations for useful risk management information.

show abstract

“…The original TRF method for earthquake risk analysis is expressed as [8][9][10][11][12][13][14][15] TRF = [(CRF + HRF + ARF) + DHF] × PDF.…”

Section: Methodsmentioning

confidence: 99%

The Total Risk Analysis of Large Dams under Flood Hazards

Chen¹,

Lin²

2018

Water

View full text Add to dashboard Cite

show abstract

“…This method was originally used for the dams in South Carolina (in United States) and its neighbor states. 12 Due to its simplicity, it is adopted by different researchers to provide a general (yet comprehensive) evaluation of dams in different countries such as Turkey, 13,14 India, 15 South Africa, 16 and Argentina. 17 Moreover Chen and Lin, 18 developed a method for total risk analysis of dams under the flood hazard.…”

Section: Introductionmentioning

confidence: 99%

Seismic risk prioritization of a large portfolio of dams: Revisited

Hariri-Ardebili

Nuss²

2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The development of potential failure mode analysis and risk analysis has greatly improved the state-of-practice for the safety of dams. Risk analysis are well developed in many industries (such as building design, medicine, and insurance) and has greatly advanced in the dams industry over the last 40 years. Engineers and scientists are now deeply investigating and thinking about failure mechanisms associated with operating dams and the probabilities of dam failures. As such, the condition of dams and the risks associated with their operation are now being portrayed better than ever before to dam safety officials and decision-makers. Accurate and adequate risk analyses for a portfolio of dams is extremely important in today’s environment to manage limited budgets and potentially save (or redirect) expensive rehabilitations to identified and critical needs. The goal is to reduce risks of a portfolio of dams in an efficient and cost-effective manner. This article provides a review on risk-based dam terminology and bridging the semi-quantitative and numerical simulation. Moreover, a review of the current state-of-practice for prioritizing a large portfolio of dams subjected to seismic loadings and potential risks is provided. As a potential application, the seismic risk of the 18 dams (which have been experienced relatively large earthquakes) all over the world is evaluated. The semi-quantitative approach is contrasted with finite element model for one of the selected dams.

show abstract

“…It is noted that the value of M max is larger than the commonly used maximum credible 1718-2018 300 Fig. 3 Completeness periods for different magnitude ranges using Stepp method (Stepp 1972) earthquake for 10,000 years return period (Singh et al 2011). Due to the unavailability of strong-motion records, the study adopted five different attenuation relationships to calculate the expected peak ground acceleration (PGA) acting on the dam sites.…”

Section: Seismic Hazard Analysismentioning

confidence: 99%

Seismic risk analysis for large dams in West Coast basin, southern Ghana

Irinyemi

2021

J Seismol

View full text Add to dashboard Cite

Dams are parts of the critical infrastructure of any nation, the failure of which would have a high-risk potential on the people and properties within the dam vicinity. Ghana is one of the most seismically active regions in West Africa and has at least 5 large dams across the region, constructed in strategic locations. The area is characterised by low-to-moderate seismicity, yet historical events suggest that major earthquakes that are potentially damaging have occurred in the study basin. This paper summarises the method used to analyse seismic risk and discusses the seismic hazards of three large dams across the study basin based on the seismicity at the dam sites and their risk due to structural properties and the location of each dam. The peak ground acceleration (PGA) values for the dam sites estimated are within the range of (0.31 g and 0.52 g) for 10,000 years return period. The study shows that one large dam has a high-risk class in the basin. This dam should be inspected and analysed for its seismic safety and people’s protection in the downstream paths.

show abstract

Seismic risk ranking for large dams in South Africa

Cited by 8 publications

References 8 publications

The Total Risk Analysis of Large Dams under Flood Hazards

The Total Risk Analysis of Large Dams under Flood Hazards

Seismic risk prioritization of a large portfolio of dams: Revisited

Seismic risk analysis for large dams in West Coast basin, southern Ghana

Contact Info

Product

Resources

About