Caracterização de sedimentos, solos e água e impactos do rompimento da barragem São Francisco: o caso de Miraí, Minas Gerais

• Autor(a) principal: Rosado, Valmir Barbosa
• Data de Publicação: 2010
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1142
• topic: Acidente ambiental; Áreas degradadas; Recuperação ambiental; Sedimento de bauxita; Environmental accident; Degraded; Environmental restoration; Bauxite pellet; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA

The aim of this work was to evaluate the soils and water stream alterations in areas affected by the rupture of San Francisco tailing dam of the Rio Pomba Cataguases Ltda Mining, occurred on January 19, 2007, in the city of Mirai, Minas Gerais state. The dam was intended to restrain fines of bauxite produced during the ore milling. Field-based investigation was carried out to cover the whole affected area estimating the volume of sediments deposited and to collect representative samples of transported soils and sediments for further physical, chemical, and mineralogical comparison. This work also involved water sampling for hydrobiological characterization. The following conclusions could be draw from this study: A) the deposited sediments presented similar texture and mineralogical composition as the pre-existing soil; B) the content of organic matter differed considerably being lower in the sediments, so that methods which focus on increasing its content should be chosen for agriculture uses; C) the deposited material will not contribute for soil chemical quality losses; D) for most of the sampling sites, hydrobiological monitoring evidenced a seasonal variation, notably when the system presented lower outflow; E) the hydrobiological monitoring also evidenced that the variability was not related with the rupture of the dam.