Spatial indicator of priority areas for the implementation of agroforestry systems: An optimization strategy for agricultural landscapes restoration

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 839, P. 156185 - 156185

Published: May 23, 2022

Language: Английский

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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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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 consequences for stream water quality of long-term changes in landscape patterns: Implications for land use management and policies

Land Use Policy, Journal Year: 2021, Volume and Issue: 109, P. 105679 - 105679

Published: Aug. 7, 2021

Language: Английский

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Hydrologic Response to Land Use and Land Cover Change Scenarios: An Example from the Paraopeba River Basin Based on the SWAT Model

Water, Journal Year: 2023, Volume and Issue: 15(8), P. 1451 - 1451

Published: April 7, 2023

Human land use cover changes (LULCCs) can cause impacts on watershed lands and water resources. The regions with conflict suffer more intense erosion processes due to their high slope drainage density. study intends evaluate scenarios an absence of verify if it contribute reductions in surface runoff, avoiding the carriage tailings river channels. In study, SWAT model was used hydrological modeling Paraopeba River affected by rupture. results show that able reproduce flow data good very performances. quality indicators calibration step were NSE = 0.66, R2 0.69, PBIAS 5.2%, RSR 0.59, validation, 0.74, 0.77, 13.5%, 0.51. LULCC from 2000 2019 led a 70% increase lateral runoff (LATQ) 74% decrease aquifer groundwater. scenario capability no reduce 37% infiltration 265%, minimizing point diffuse contamination channel.

Language: Английский

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Water Security Assessment of Groundwater Quality in an Anthropized Rural Area from the Atlantic Forest Biome in Brazil

Water, Journal Year: 2020, Volume and Issue: 12(3), P. 623 - 623

Published: Feb. 25, 2020

The exploitation of natural resources has grown mainly due to the high rate population growth that changed over time around planet. Water is one most needed essential for survival. Despite all efforts made improve water security, an environmental impact related anthropogenic influence remains great concern, which alteration surface and groundwater quality. In many regions world, there limited or no access rural urban supply while a need sanitation facilities. This work evaluated spatial distribution quality as well their changes in wet dry seasons tropical climate Atlantic Forest Biome. study area under influence, municipality Igarassú, Pernambuco State, Brazil. analysis raw was based on Standard Methods Examination Wastewater, referenced Brazilian Ministry Health Consolidation Ordinance sets standards drinking water. temporal analyses indicated variation from seasons, whereas results revealed deviations Brazilian’s Supply Standards some physicochemical parameters. There increase values parameters during season hydrological compartments. anthropized Biome affecting It is, therefore, necessary develop policies put them into practice by implementing engineering projects guarantee proper treatment order bring back good status this region.

Language: Английский

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Land use footprints and policies in Brazil

Land Use Policy, Journal Year: 2024, Volume and Issue: 140, P. 107121 - 107121

Published: March 2, 2024

Ecological footprints have been assessed widely from a resource production-consumption perspective but much less land use per capita availability-demand standpoint. The later view is key to policy because it sheds light on the need of changing or adapting uses get balance between those ecological (e.g., forests, riparian wetlands) and socioeconomic cropland) value. Thus, purpose this study was introduce LUEF – Land Use Footprint, defined as area specific occupation in region over population that pre-defined timeframe. index then applied Brazilian territory at macro resolution, 2015 2019 period. results identified deforestation, urban densification, cropland/pasture expansion forest restoration main drivers change studied period, well supporters concomitant gross domestic product. also revealed negative consequences changes for water security organic carbon stocks top layer soils (decline). Some regional metrics were proposed revert these consequences, namely control above 100 m2/hab keep National average level, cropland below 900 preserve stock regions' topsoils close (46.9 Mg/ha), reducing greenhouse gas emissions sequel. leveling LUEFs aforementioned values requires intensification ongoing initiatives relevant mitigate footprints. various examples, which included Forest Code, policies family agriculture, Payment Ecosystem Services programs, among others. Overall, recognized Brazil being right track pursue sustainable use.

Language: Английский

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Role of Mine Tailings in the Spatio-Temporal Distribution of Phosphorus in River Water: The Case of B1 Dam Break in Brumadinho

Water, Journal Year: 2022, Volume and Issue: 14(10), P. 1572 - 1572

Published: May 14, 2022

Human actions in the drainage network of hydrographic basins interfere with functioning ecosystems, causing negative impacts on environment. Among these impacts, mass loads a high concentration phosphorus (P) have significant potential for point and diffuse pollution freshwater. The objective this work was to model P spatially Paraopeba River basin, namely main water course 67 sub-basins, temporally years 2019, 2020, 2021, after rupture B1 tailings dam Vale, SA company Brumadinho (Minas Gerais Brazil). distribution total concentrations (Pt) relation environmental attributes (terrain slope, soil class, land use) stream flow assessed help SWAT, well-known Soil Water Assessment Tool, coupled box-plot cluster analyses. Pt were obtained from 33 sampling points monitored weekly basis. Mean values varied 0.02 1.1 mg/L maximum 0.2 15.9 across basin. modeling results exposed an impact quality stretch extending 8.8–155.3 km dam, related rupture. In sector, if contribution could be isolated other sources, average would 0.1 mg/L. highest (15.9 mg/L) directly proportional urban area sub-basin intersecting limits Betim town Belo Horizonte Metropolitan Region. general, sprawl as well forest-agriculture forest-mining conversions showed close relationship increased Pt, did sub-basins predominance argisols accentuated slope (>20%). There various moments presenting above legal thresholds (e.g., >0.15 mg/L), mainly rainy season.

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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Small Patches of Riparian Woody Vegetation Enhance Biodiversity of Invertebrates

Water, Journal Year: 2020, Volume and Issue: 12(11), P. 3070 - 3070

Published: Nov. 2, 2020

Patches of riparian woody vegetation potentially help mitigate environmental impacts agriculture and safeguard biodiversity. We investigated the effects forest on invertebrate diversity in coupled stream-riparian networks using a case study Zwalm river basin (Flanders, Belgium). Agriculture is one main pressures limited to number isolated patches. Our 32 sites comprised nine unshaded “unbuffered” which were paired with shaded “buffered” same stream reach, along five ‘least-disturbed’ downstream sites. sampled water chemistry, habitat characteristics invertebrates (carabid beetles spiders) at each site. Three methods used quantify attributes different spatial scales: visually-assessed qualitative index, quantitative estimates categories six rectangular plots (10 × 5 m) geographic information system (GIS)-derived land cover data. relationships between scales linear regression redundancy analyses. Spiders carabids most associated local attributes. In contrast, aquatic macroinvertebrates strongly influenced by extent band upstream (100–300 m). These findings demonstrate value quantifying GIS-based metrics over larger into assessments efficacy management as complement more detailed scale situ. highlight even small patches an otherwise extensively disturbed landscape supporting biodiversity both terrestrial freshwater emphasize need consider multiple strategies aim human networks.

Language: Английский

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