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Ecosystem services potential and soil conservation policies with emphasis on degraded pastures in Brazil

Geography and Sustainability 2024年第4期5卷 660-672页

作者： Adriana Monteiro da Costa Maise Soares de Moura Isadora Fonseca Navarro Victor Cordeiro da Silva teresa cristina tarlépissarra Carlos Alberto Valera Luís Filipe Sanches Fernandes Fernando Antonio Leal Pacheco Federal University of Minas Gerais(UFMG) Avenida Antônio Carlos6620PampulhaBelo HorizonteMG 31270-901Brazil São Paulo State University(Unesp) School of Agricultural and Veterinarian SciencesJaboticabal.Access Way Prof.Paulo Donato Castellanes/nJaboticabal SP 14884–900Brazil Luiz de Queiroz College of Agriculture University of São Paulo(ESALQ)Avenida Pádua Dias235CEP 13418-900PiracicabaSão Paulo StateBrazil Regional Coordination of Environmental Justice Prosecutors for the Paranaíba and Baixo Rio Grande River Basins Rua Coronel Antônio Rios951UberabaMG 38061-150Brazil CITAB–Center for Agro-environmental and Biological Research and Technologies University of Trás-os-Montes and Alto DouroAp.10135001–801 Vila RealPortugal CQVR–Vila Real Chemistry Center University of Trás-os-Montes and Alto DouroAp.10135001-801 Vila RealPortugal Post-Doctorate researcher University of Trás-os-Montes and Alto DouroAp.10135001-801 Vila RealPortugal POLUS-Land Use Policy Group Paulista State University(UNESP)Access Way Prof.Paulo Donato Castellanes/nJaboticabal SP 14884–900Brazil

Different global agendas have discussed the role of soils in mitigating and reducing global problems related to climate change,food security,biodiversity and erosion,among *** this in mind,the aim was to draw up an overview of the main soil agendas in Europe and Brazil,analysing their impact on the establishment of legal frameworks for soil use and *** Brazil,pastures are seen as an important alternative for converting degraded areas into ecosystem *** this end,a literature review was carried out using databases on the Scopus,Web of Science,Science Direct and Scielo platforms,as well as consulting documents from the European Union Missions in Horizon Europe and Brazilian legislation on the *** a pilot river basin,the Potential for Conservation Use(PCU)method was applied,which is used in Brazil to assess the impacts of different uses on the natural capital of soils,serving as a metric to guide public soil conservation *** was concluded that,on the European scene,discussions on soils have taken place in an integrated and organised way,with actions to mobilise different players in *** Brazil,even though there are important legal frameworks,actions are still restricted and disjointed,pointing to the need for progress in soil *** both scenarios,there is a need for scientifically validated metrics at regional scales that can contribute to a harmonised database capable of subsidising the development of efficient public policies to advance soil conservation at a global level.

关键词： EU mission Soil governance Conservation use potential Soil services PronaSolos

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The Igarape Weir decelerated transport of contaminated sediment in the Paraopeba River after the failure of the B1 tailings dam(Brumadinho)

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International Journal of Sediment Research 2023年第5期38卷 673-697页

作者： Daniela Patrícia Salgado Terêncio Fernando António Leal Pacheco Renato Farias do Valle Junior Maytê Maria Abreu Pires de Melo Silva teresa cristina tarlé pissarra Marília Carvalho de Melo Carlos Alberto Valera Luís Filipe Sanches Fernandes Inov4Agro/Centro de Investiga??o e Tecnologias Agroambientais e Biológicas Universidade de Trás-os-Montes e Alto Douro Centro de Química de Vila Real Universidade de Trás-os-Montes e Alto Douro Faculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista(UNESP) Via de Acesso Prof.Paulo Donato Castellane Instituto Federal do Triangulo Mineiro Campus Uberaba Laboratório de Geoprossessamento 5. Secretaria de Estado de Meio Ambiente e Desenvolvimento Sustentável Cidade Administrativa do Estado de Minas Gerais Rodovia Jo?o Paulo II 6. Coordenadoria Regional das Promotorias de Justi?a do Meio Ambiente das Bacias dos Rios Paranaíba e Baixo Rio Grande Rua Coronel Ant?nio Rios

The B1 dam of Co rrego do Feij～ao Mine, owned by Vale, S.A. mining company and located on the FerroCarv～ao stream, collapsed and injected 2.8 Mm3of clayey, silty, and sandy iron-and manganese-rich tailings into the Paraopeba River(Minas Gerais state, Brazil). The accident occurred on 25 January2019 and the tailings have been co-transported with coarser natural sediment since then, being partly trapped in the Igarape Weir reservoir located on the Paraopeba River nearly 45 km downstream the injection point. The general purpose of the current study was to model suspended sediment transport in the vicinity of the Igarape Weir aiming to assess the concomitant barrier effect imposed by this ***, the spatial distributions of suspended clay, silt, and very fine-grained sand fractions(CSS) of sediment were mapped around the Igarape Weir under low-flow(16 m3/s) and high-flow(5 to 10,000years return period stream discharge; 699—2,699 m3/s) regimes, using RiverFlow2D as the modelling tool. The concentrations of the various grain materials in the upstream and downstream sectors were quantified linking the barrier effect to concentration reductions in the direction of stream flow. It was also a study goal to calculate differences of iron and manganese concentrations in the sediment + tailings mixtures along the Paraopeba River. The study results showed reductions in the CSS between 6.6% and18%, from upstream to downstream of the Igarape Weir, related with backwater effects, free and submerged hydraulic jumps, bank sedimentation in periods of high flow, and streambed sedimentation controlled by channel sinuosity and tailings density. These reductions were accompanied by drops in the concentrations of iron and manganese present in the clay and silt fractions, which varied between 6% and42% under low flows and between 16% and 44% under high flows. Bank sedimentation was viewed as a potential threat to the riparian vegetation in the long-term. Dredging is the poten

关键词： Sediment transport Tailings dam break Metal contamination Hydrodynamic modelling RiverFlow2D Ratio concentration analysis

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