A coupled modelling effort to study the fate of contaminated sediments downstream of the Coles Hill deposit, Virginia, USA

Castro‐Bolinaga, Celso F.; Zavaleta, Edgardo R.; Diplas, Panayiotis

doi:10.5194/piahs-367-272-2015

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…1). Due to the environmental impact that its development might have in the future, a large, comprehensive, and continuing investigation is being conducted to characterize the geological, geochemical, and hydrological conditions associated with this deposit [8][9][10][11][12][13][14]. Fig.…”

Section: Study Areamentioning

confidence: 99%

Sediment pulses and extreme events: Assessing the effect of storm characteristics on propagation dynamics

2018

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The objective of this research is to assess the effect that extreme hydrologic events have on the propagation of sediment pulses in river corridors. These sediment-flow hazards are associated with large amounts of loose material suddenly deposited in rivers by the action of external factors or processes of natural or anthropogenic origin, including landslides, debris flows from tributaries, dam removal projects, and mining-related activities. Their occurrence is associated with severe channel aggradation and degradation, floodplain deposition, damage of infrastructure, and impairment of riparian and aquatic ecosystems. Given that the intensity of rainfall events have been significantly enhanced due to the influence of various human activities, sediment pulses are expected to become more common, with a more pronounced downstream impact as such climatic changes directly affect the magnitude, duration, and frequency of flows in riverine environments. Herein, numerical simulations were performed to characterize the propagation of a fine-grained sediment pulse for the 10-, 100-, and 500-yr storms. Results indicate that magnitude, frequency, and duration of the storms primarily influence the temporal variation of the total sediment discharge. In particular, these storm characteristics have a marked impact on the relationship between pre- and post-pulse conditions in the river channel, the dissipation of the pulse peak discharge, and the travel time of the pulse apex.

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Section: Study Areamentioning

confidence: 99%

Sediment pulses and extreme events: Assessing the effect of storm characteristics on propagation dynamics

2018

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“…On other hand, infiltration of rainfall and runoff into the TSF can increase the pore pressure acting on the retention structure, affecting stability and susceptibility to future erosive forces (Blight & Fourie, 2005). Additionally, the saturation of TSFs due to flooding can lead to leaching of dissolved contaminants into surface waters (Castro‐Bolinaga et al, 2014; Concas et al, 2006). These pluvial and fluvial interactions are schematically summarized in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

Tailings storage facilities flood exposure assessment using a 2D hydrodynamic model

Murillo

McIntyre

Cohen

et al. 2022

J Flood Risk Management

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Minimizing environmental pollution from Tailings Storage Facilities (TSFs) is one of the key goals of the mining sector. While much attention is given to risks from potential catastrophic failures of large TSFs, there is also a need to assess risks due to noncatastrophic but more frequent releases of contaminants. In response to this need, this article proposes a method for prioritizing TSFs in terms of flood exposure, based on flood maps produced by the Shallow Water Integrated Flood Tool. The method was implemented using a case study of a flood event in the Copiap o city region (Atacama, Chile). A sensitivity analysis was carried out to evaluate the influence of different model configurations and input parameters. The results showed that 10% of all the TSFs in the case study region were exposed to flood waters due to the fluvial dynamics of the Copiapo River. Additionally, the sensitivity analysis revealed that in the event of extreme local precipitation, capable of generating runoff, up to 88% of all the TSFs could have some degree of flood exposure. The results also suggest that flood simulations using satellite-derived terrain data at moderate resolution can be used for a preliminary large-scale assessment of TSF flood exposure. K E Y W O R D Scontaminated land, extreme events, mapping of flood hazards, SWIFT, TSFs

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A coupled modelling effort to study the fate of contaminated sediments downstream of the Coles Hill deposit, Virginia, USA

Cited by 2 publications

References 14 publications

Sediment pulses and extreme events: Assessing the effect of storm characteristics on propagation dynamics

Sediment pulses and extreme events: Assessing the effect of storm characteristics on propagation dynamics

Tailings storage facilities flood exposure assessment using a 2D hydrodynamic model

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