A framework model to integrate sources and pathways in the assessment of river water pollution

Environmental Pollution, Journal Year: 2024, Volume and Issue: 347, P. 123661 - 123661

Published: Feb. 26, 2024

Metal and nutrient pollution, soil erosion, alterations in climate hydrology are prevalent issues that impact the water quality of riverine systems. However, integrated approaches to assess isolate causes paths river pollution scarce, especially case watersheds impacted by multiple hazardous activities. Therefore, a framework model for investigating sources was developed. The chosen study area Paraopeba River basin located Minas Gerais, Brazil. Besides agriculture, industrial, urban sources, this region profoundly affected rupture B1 tailings dam (in January 2019) at Córrego do Feijão mine, resulting release metal-rich waste. Considering situation, thirty-nine physicochemical hydromorphological parameters were examined basin, 2019-2023 period. analysis involved various statistical techniques, including bivariate multivariate methods such as correlation analysis, principal component clustering. mainly metal contamination from collapse, whereas contamination, industrial discharges, predominantly its tributaries. Additionally, elevated concentrations aluminum, iron, nitrate, sulfate both main tributaries can be attributed diffuse point source pollution. In terms hydromorphology type, interaction between woody vegetation erosion-resistant soils, latosols, contributes stability riverbanks river. Meanwhile, tributaries, presence neosols sparse urbanized areas promoted riverbank erosion potentially amplifying While conducted particular watershed, findings based on methodology applied universally. Hence, insights surface research valuable resource researchers studying with diverse sources.

Language: Английский

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Scenarios of environmental deterioration in the Paraopeba River, in the three years after the breach of B1 tailings dam in Brumadinho (Minas Gerais, Brazil)

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 891, P. 164426 - 164426

Published: May 24, 2023

The collapse of B1 dam at the Córrego do Feijão mine Vale, S.A., located in Ferro-Carvão stream watershed (Brazil), released 11.7 Mm3 tailings rich iron and manganese, 2.8 entered Paraopeba River 10 km downstream. Seeking to predict evolution environmental deterioration river since break on January 25, 2019, present study generated exploratory normative scenarios based predictive statistical models, proposed mitigating measures subsides ongoing monitoring plans. segmented into three sectors: "anomalous" for distances ≤63.3 from site, "transition" (63.3-155.3 km), "natural" (meaning unimpacted by 2019; >155.3 km). predicted a spread until reaching sector rainy season 2021, their containment behind weir Igarapé thermoelectric plant sector, dry season. Besides, they water quality changes vigor riparian forests (NDVI index) along River, season, restriction these impacts indicated exceedances chlorophyll-a period 2019-January 2022, but not exclusively caused rupture as also occurred areas affected accident. Conversely, manganese clearly flagged failure, persist. most effective measure is likely dredging currently it represents solely 4.6 % what has river. Monitoring paramount update system enters route towards rewilding, must include sediments, vegetation, dredging.

Language: Английский

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Groundwater flow and transport of metals under deposits of mine tailings: A case study in Brumadinho, Minas Gerais, Brazil

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100690 - 100690

Published: March 13, 2024

The deposits of mine tailings can be a source groundwater contamination by metals. In this study, we simulated the concentrations iron, manganese and aluminum in potentially affected drainage from located Brumadinho (Brazil). aim was to verify whether observed region attributed these drainages. simulation used FREEWAT graphical interface, which incorporates MODFLOW model, hydraulic properties existing unconfined confined aquifers, spatial distribution tailings' deposits, dissolved iron measured drilled wells. period 20 years, starting 2019 after collapse B1 dam Córrego do Feijão Vale, S.A. modeling results revealed plumes metal progressively less dispersed over time, aquifer, increased aquifer. both aquifers were generally lower than legal limits imposed for human consumption, although some areas vicinity had higher those limits, especially widened time. most relevant result revelation that contribution wells might have not exceeded 1%. This is important management standpoint, because monitoring anthropogenic cases (where rock weathering dominates chemistry) becomes more challenging.

Language: Английский

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The Modeling of a River Impacted with Tailings Mudflows Based on the Differentiation of Spatiotemporal Domains and Assessment of Water–Sediment Interactions Using Machine Learning Approaches

Water, Journal Year: 2024, Volume and Issue: 16(3), P. 379 - 379

Published: Jan. 23, 2024

The modeling of metal concentrations in large rivers is complex because the contributing factors are numerous, namely, variation sources across spatiotemporal domains. By considering both domains, this study modeled derived from interaction river water and sediments contrasting grain size chemical composition, regions seasonal precipitation. Statistical methods assessed processes partitioning transport, while artificial intelligence structured dataset to predict evolution as a function environmental changes. methodology was applied Paraopeba River (Brazil), divided into sectors coarse aluminum-rich natural enriched fine iron- manganese-rich mine tailings, after collapse B1 dam Brumadinho, with 85–90% rainfall occurring October March. prediction capacity random forest regressor for aluminum, iron manganese concentrations, average precision > 90% accuracy < 0.2.

Language: Английский

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Five years after the collapse of the Fundão Dam: lessons from temporal monitoring of chemistry and acute toxicity

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(3)

Published: Feb. 9, 2024

Language: Английский

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The modelling of river water contamination by tailings mudflows: The case of phosphorus in the Paraopeba River basin

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100701 - 100701

Published: March 26, 2024

The Soil and Water Assessment Tool (SWAT) was used to assess total phosphorus concentrations (TOT-P) fluxes (TOT_P) in the Paraopeba River basin, located state of Minas Gerais, Brazil, following collapse tailings dam B1 Brumadinho. model calibrated validated for periods before (2000–2018) after (2019–2021) Brumadinho 25 January 2019, with great accuracy measured by various performance indicators (e.g., R2 ≈ 0.8). flow phosphorus-containing sludge from iron-ore explored Córrego do Feijão Mine Vale, SA, released break has impacted water through large increments TOT-P near site (60–100%, pre-rupture values varying between 0.06 0.1 mg/L). But other major sources were flagged, namely urban Betim region that raised 0.9 mg/L periodically during entire simulation period. study also revealed controls concentration coverage forests lowered down at 0.5–0.8 μg/L.km2. lowering rate was, however, dependent on occupation argisols. As per results, larger percentage argisols a will be surrounding courses, meaning are prone erosion leaching. A cluster analysis input terrain slope, soil type) output runoff) variables SWAT allowed relating surface- TOT_P underground-dominant hydrological processes, respectively runoff groundwater flow, linking them specific environmental such as steep slopes first case latosols smooth landscapes second case. management implications retrieved this holistic assessment discussed. Finally, checked against Brazilian standards. In regard, compared limits established Resolution 454/2012 National Environmental Council – CONAMA. Some sub-basins exhibited levels above legal threshold, contamination viewed systemic requiring immediate action implementation sewage treatment best practices agriculture), well monitoring spatial temporal frames. existence extreme rainfall events basin main cause inaccuracies, overestimated TOT-P.

Language: Английский

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Role of backwater effects on the attenuation of metal spreading in rivers: A study in the Paraopeba River after the B1 tailings dam collapse in Brumadinho

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100740 - 100740

Published: April 26, 2024

The B1 tailings dam of Córrego do Feijão iron-ore mine Vale SA, located in the Ferro-Carvão stream watershed (Brumadinho municipality, state Minas Gerais, Brazil), collapsed 25 January 2019. This accident had unprecedent water resources management impacts Paraopeba River basin, parent stream, marked by suspension drinking supply to Metropolitan Region Belo Horizonte, which was decided after huge rise turbidity and metal concentrations aquatic environment, mostly iron manganese. authorities keep use downstream site prohibited today, entailed a number studies understand predict evolution spreading before envisaging any lift. One those is presented now purpose assess role weir 40 km from outlet, attenuation manganese fluxes. called Igarapé modeling dissolved using RiverFlow 2D software revealed 33.5-fold fluxes per unit length, 3062.0 g/yr.km upstream 91.4 downstream, under flows typical 10-year return periods. related with backwater effects that reduced flow velocities inundated banks during flood events, induced precipitation iron-bearing sand particles. not visible for because element preferably included silt clay particles were affected their small sizes (and hence weights). Our results corroborate previous outcomes highlighted capacity retain tailings, decelerating propagation opened time window remove large volume still deposited over river bed through dredging. monitoring eventual treatment also paramount seem be flooding.

Language: Английский

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Carbon footprints of tailings dams' disasters: A study in the Brumadinho region (Brazil)

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 949, P. 175026 - 175026

Published: Aug. 2, 2024

Tailings dams' breaks are environmental disasters with direct and intense degradation of soil. This study analyzed the impacts B1 tailings dam rupture occurred in Ribeirão Ferro-Carvão watershed (Brumadinho, Brazil) January 25, 2019. Soil organic carbon (SOC) approached degradation. The analysis encompassed wetlands (high-SOC pools) located so-called Zones Decreasing Destructive Capacity (DCZ5 to DCZ1) defined along Ferro-Carvão's stream bed banks after disaster. Remote sensed water indices were extracted from Landsat 8 Sentinel-2 satellite images spanning 2017-2021 period used distinguish other land covers. annual SOC was MapBiomas repository inside outside DCZs same period, assessed field 2023. Before collapse, maintained stable levels SOC, while afterwards they decreased substantially reaching minimum values reductions abrupt: for example, DCZ3 decrease 51.28 ton/ha 2017 4.19 Besides, increased near farther site, a result attributed differences percentages clay silt tailings, which also direction. as whole experienced slight reduction average nearly 43 38 2021. use changes related management namely opening accesses remove them valley, creation spaces temporary deposits, among others. Overall, highlighted footprints accidents on affect not only areas impacted mudflow but systemically surrounding watersheds. is noteworthy.

Language: Английский

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Estimation of the ecological integrity of the Guadiana River using Partial Least Squares Path Modelling and simulation scenarios

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176305 - 176305

Published: Sept. 16, 2024

Language: Английский

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Mortality patterns in municipalities of a mining region before the Brumadinho dam failure, state of Minas Gerais, Brazil

Revista Brasileira de Epidemiologia, Journal Year: 2023, Volume and Issue: 26(suppl 1)

Published: Jan. 1, 2023

To describe the patterns of overall mortality and from external causes temporal evolution in municipalities Paraopeba River Basin, before socio-environmental disaster Brumadinho dam and, additionally, to investigate correlation between socioeconomic deprivation these municipalities.

Language: Английский

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