Hydraulic Modeling of Extreme Hydrologic Events: Case Study in Southern Virginia

Castro‐Bolinaga, Celso F.; Diplas, Panayiotis

doi:10.1061/(asce)hy.1943-7900.0000927

Cited by 13 publications

(13 citation statements)

References 22 publications

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“…1). Data for constructing the river terrain model were obtained from the hydraulic model developed by Castro-Bolinaga and Diplas [10]. These data primarily include channel bathymetry and slope, and Manning's n values to describe the boundary roughness.…”

Section: Modeling Methodologymentioning

confidence: 99%

“…The corresponding hydrographs, with peak discharges at the inlet of each reach provided in Table 2, were obtained from an event-based hydrologic model developed by Kingston et al [9]. These hydrographs were implemented as the upstream boundary condition for the unsteady flow simulations, whereas rating curves of water surface elevation versus discharge generated by the aforementioned hydraulic model [10] were set as the downstream boundary condition. The number of cross-sections was defined based on the geomorphic characteristics of the river channels, resulting in an average distance between consecutive cross-sections of 158.3 m for Mill Creek and 150.9 m for Whitethorn Creek.…”

Section: Modeling Methodologymentioning

confidence: 99%

“…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%

“…1). Castro-Bolinaga and Diplas [10] found that the long, narrow lake that has formed upstream of this structure (i.e., the Banister Lake) hinders the capacity of the Banister River to move sediment, causing a sizable reduction of the flow velocity and boundary shear stress as water enters the reservoir. Hence, it is expected that the Banister Lake will have an important role in the fate of tailings downstream of the deposit.…”

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confidence: 99%

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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: Modeling Methodologymentioning

confidence: 99%

Section: Modeling Methodologymentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

mentioning

confidence: 99%

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

2018

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“…The economic and environmental implications that the development of the Coles Hill site might have in the future have motivated the implementation of a large, comprehensive, and continuing investigation to characterize the geological, geochemical and hydrological conditions surrounding the deposit (Gannon et al, 2012;Kingston et al, 2012;Castro-Bolinaga & Diplas, 2014;Levitan et al, 2014;Tappa et al, 2014). Part of this investigation included a coupled numerical modelling effort to study the fate of tailings due to a hypothetical containment cell failure triggered by an extreme hydrologic event.…”

Section: Introductionmentioning

confidence: 99%

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

2015

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Abstract. This paper presents the preliminary results of a coupled modelling effort to study the fate of tailings (radioactive waste-by product) downstream of the Coles Hill uranium deposit located in Virginia, USA. The implementation of the overall modelling process includes a one-dimensional hydraulic model to qualitatively characterize the sediment transport process under severe flooding conditions downstream of the potential mining site, a two-dimensional ANSYS Fluent model to simulate the release of tailings from a containment cell located partially above the local ground surface into the nearby streams, and a one-dimensional finite-volume sediment transport model to examine the propagation of a tailings sediment pulse in the river network located downstream. The findings of this investigation aim to assist in estimating the potential impacts that tailings would have if they were transported into rivers and reservoirs located downstream of the Coles Hill deposit that serve as municipal drinking water supplies.

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The effect of coupling hydrologic and hydrodynamic models on probable maximum flood estimation

Felder

Zischg

Weingartner

2017

Journal of Hydrology

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Deterministic rainfall-runoff modelling usually assumes stationary hydrological system, as model parameters are calibrated with and therefore dependant on observed data. However, runoff processes are probably not stationary in the case of a probable maximum flood (PMF) where discharge greatly exceeds observed flood peaks. Developing hydrodynamic models and using them to build coupled hydrologic-hydrodynamic models can potentially improve the plausibility of PMF estimations. This study aims to assess the potential benefits and constraints of coupled modelling compared to standard deterministic hydrologic modelling when it comes to PMF estimation. The two modelling approaches are applied using a set of 100 spatio-temporal probable maximum precipitation (PMP) distribution scenarios. The resulting hydrographs, the resulting peak discharges as well as the reliability and the plausibility of the estimates are evaluated. The discussion of the results shows that coupling hydrologic and hydrodynamic models substantially improves the physical plausibility of PMF modelling, although both modelling approaches lead to PMF estimations for the catchment outlet that fall within a similar range. Using a coupled model is particularly suggested in cases where considerable flood-prone areas are situated within a catchment.

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Hydraulic Modeling of Extreme Hydrologic Events: Case Study in Southern Virginia

Cited by 13 publications

References 22 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

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

The effect of coupling hydrologic and hydrodynamic models on probable maximum flood estimation

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