Barragens de rejeito não-seguras da Bacia do Paraopeba, Minas Gerais: risco para recursos hídricos e ictiofauna

Abstract

The current management of mining tailings dams features an alarming picture. Two recent disasters can be cited, the Fundão dam rupture, in the municipality of Mariana (MG), in the year 2015 and Barragem I dam rupture, in Brumadinho municipality (MG) in 2019. This master thesis aims at understanding in impact of non-secure dam rupture potentials in the Paraopeba river basin (MG) in the water-use and fish conservation along the basin. In the first chapter, a contextualization of the disasters related to tailings dams in Brazil was carried out, among a critical analysis of the federal and state government roles as a supervisory and controlling agents, mainly in the management of tailings dam’s security in the Minas Gerais state. In the second chapter, the potential impacts in the use of the water resources of the possible scenarios for discharging tailings dams from unsecured mining ventures in the Paraopeba river basin (MG) were quantified and analyzed. The most of them scenario the rupture is dam “Bacias de Contenção de Sedimentos 1, 2 & 3”, in Conselheiro Lafaiete. He impacting 88 waters supply and e affecting 2.260 m³/h of water catchment. In the third chapter, the potential impacts tailings dam rupture scenarios from non-secure mining ventures in the Paraopeba river basin (MG) on the dowstream fish communities were analyzed. Any scenario that occurs will impact the species analyzed in irreversible way