Modeling framework for simulating concentrations of solute chemicals, nanoparticles, and solids in surface waters and sediments: WASP8 Advanced Toxicant Module

Knightes, Christopher D.; Ambrose, Robert B.; Avant, Brian; Han, Yuexin; Acrey, Brad; Bouchard, Dermont; Zepp, Richard G.; Wool, Tim A.

doi:10.1016/j.envsoft.2018.10.012

Cited by 37 publications

(31 citation statements)

References 25 publications

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“…It is apparent that the fine particles from the tailings can travel long distances in this mountainous river [12,33,35]. However, the reduced stream velocity along the longitudinal river networks could slow down the transport speed of the tailings materials, and this was supported by our simulations and could prove the third hypothesis (i.e., the transport speed of the radionuclides would decrease along the river networks).…”

Section: Mass Transport Of Radionuclidessupporting

confidence: 65%

“…Besides radioactive contamination of the landslide itself, the run-out or generated impulse wave may further cause damage to nearby houses, infrastructure, or pasture land [24,57]. It was demonstrated that the landslide could cause considerable change in water quality with large increases in the concentration of suspended solids and toxic elements [33,39,58]. Therefore, the instantaneous release of Pb-210 that is associated with the release of the suspended sediment was studied in this paper.…”

Section: Mass Transport Of Radionuclidesmentioning

confidence: 99%

“…Numerical hydrological models are one of the tools for the impact assessment and the regulatory decision-making process, such as assisting in the simulation of the transport of landslide-induced contamination, quantification of the maximum contaminant concentration in the water, or evaluation of different feasible remediation strategies [33]. As stated by numerous studies, numerical simulation is a useful and advantageous tool in both the prediction and retrospective evaluation of mass transport of pollutants in surface waters [12,[34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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Landslide-Induced Mass Transport of Radionuclides along Transboundary Mailuu-Suu River Networks in Central Asia

Torgoev

Zaredinov

et al. 2021

Remote Sensing

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Seismically triggered landslides are a major hazard and have caused severe secondary losses. This problem is especially important in the seismic prone Mailuu-Suu catchment in Kyrgyzstan, as it hosts disproportionately sensitive active or legacy uranium sites with deposited radioactive extractive wastes. These sites show a quasi-continuous release of radioactive contamination into surface waters, and especially after natural hazards, a sudden and massive input of pollutants into the surface waters is expected. However, landslides of contaminated sediments into surface waters represent a substantial exposure pathway that has not been properly addressed in the existing river basin management to date. To fill this gap, satellite imagery was massively employed to extract topography and geometric information, and the seismic Scoops3D and the one-dimensional numerical model, Hydrologic Engineering Centre, River Analysis System (HEC-RAS), were chosen to simulate the landslide-induced mass transport of total suspended solids (TSS) and natural radionuclides (Pb-210 as a proxy for modeling purposes) within the Mailuu-Suu river networks under two earthquake and two hydrological scenarios. The results show that the seismically vulnerable areas dominated in the upstream areas, and the mass of landslides increased dramatically with the increase of earthquake levels. After the landslides, the concentrations of radionuclides increased suddenly and dramatically. The peak values decreased along the longitudinal gradient of river networks, with the concentration curves becoming flat and wide in the downstream sections, and the transport speed of radionuclides decreased along the river networks. The conclusions of this study are that landslides commonly release a significant amount of pollutants with a relatively fast transport along river networks. Improved quantitative understanding of waterborne pollution dispersion across national borders will contribute to better co-ordination between governments and regulatory authorities of riparian states and, consequently, to future prevention of transnational political conflicts that have flared up in the last two decades over alleged pollution of transboundary water bodies.

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Section: Mass Transport Of Radionuclidessupporting

confidence: 65%

Section: Mass Transport Of Radionuclidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Landslide-Induced Mass Transport of Radionuclides along Transboundary Mailuu-Suu River Networks in Central Asia

Torgoev

Zaredinov

et al. 2021

Remote Sensing

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“…Though not as environmentally relevant, dry weathering provides better control of released particles than wet, making it preferable when comparing release from different materials. Quantitative studies can now use the enhanced protocol to follow up on the modulation of weathering by wavelength [83][84][85] and by molecularly dissolved additives (UV-stabilizers, pro-oxidants).…”

Section: Conclusion and Next Stepsmentioning

confidence: 99%

Fragmentation of polymer nanocomposites: modulation by dry and wet weathering, fractionation, and nanomaterial filler

Zepp

Ruggiero

Acrey

et al. 2020

Environ. Sci.: Nano

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“…The aquatic C cycle in most watershed models is often oversimplified [ 19 – 24 ], though terrestrial C fluxes can be simulated with different levels of complexity of biogeochemical processes [ 25 , 26 ]. In contrast, many water quality models require inputs from terrestrial processes to drive their simulations of complex aquatic processes such as hydrodynamics and biochemical conversion processes in streams and lakes [ 27 – 31 ]. In order to fill the gaps between watershed models and water quality models with respect to C cycling across terrestrial and aquatic ecosystems, we have developed terrestrial-aquatic C cycling algorithms within the framework of the Soil and Water Assessment Tool (SWAT) [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Modeling sediment diagenesis processes on riverbed to better quantify aquatic carbon fluxes and stocks in a small watershed of the Mid-Atlantic region

Lee

et al. 2020

Carbon Balance Manage

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Background Despite the widely recognized importance of aquatic processes for bridging gaps in the global carbon cycle, there is still a lack of understanding of the role of riverbed processes for carbon flows and stocks in aquatic environments. Here, we added a sediment diagenesis and sediment carbon (C) resuspension module into the SWAT-C model and tested it for simulating both particulate organic C (POC) and dissolved organic C (DOC) fluxes using 4 years of monthly observations (2014–2017) in the Tuckahoe watershed (TW) in the U.S. Mid-Atlantic region. Results Sensitivity analyses show that parameters that regulate POC deposition in river networks are more sensitive than those that determine C resuspension from sediments. Further analyses indicate that allochthonous contributions to POC and DOC are about 36.6 and 46 kgC ha −1 year −1 , respectively, while autochthonous contributions are less than 0.72 kgC ha −1 year −1 for both POC and DOC (less than 2% of allochthonous sources). The net deposition of POC on the riverbed (i.e., 11.4 kgC ha −1 year −1 ) retained ca. 31% of terrestrial inputs of POC. In addition, average annual buried C was 0.34 kgC ha −1 year −1 , accounting for only 1% of terrestrial POC inputs or 3% of net POC deposition. The results indicate that about 79% of deposited organic C was converted to inorganic C (CH 4 and CO 2 ) in the sediment and eventually released into the overlying water column. Conclusion This study serves as an exploratory study on estimation of C fluxes from terrestrial to aquatic environments at the watershed scale. We demonstrated capabilities of the SWAT-C model to simulate C cycling from uplands to riverine ecosystems and estimated C sinks and sources in aquatic environments. Overall, the results highlight the importance of including carbon cycle dynamics within the riverbed in order to accurately estimate aquatic carbon fluxes and stocks. The new capabilities of SWAT-C are expected to serve as a useful tool to account for those processes in watershed C balance assessment.

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Modeling framework for simulating concentrations of solute chemicals, nanoparticles, and solids in surface waters and sediments: WASP8 Advanced Toxicant Module

Cited by 37 publications

References 25 publications

Landslide-Induced Mass Transport of Radionuclides along Transboundary Mailuu-Suu River Networks in Central Asia

Landslide-Induced Mass Transport of Radionuclides along Transboundary Mailuu-Suu River Networks in Central Asia

Fragmentation of polymer nanocomposites: modulation by dry and wet weathering, fractionation, and nanomaterial filler

Modeling sediment diagenesis processes on riverbed to better quantify aquatic carbon fluxes and stocks in a small watershed of the Mid-Atlantic region

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