EM - Escola de Minas
URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6
Notícias
A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.
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2 resultados
Resultados da Pesquisa
Item Recharge sources and hydraulic communication of karst aquifer, São Miguel watershed, MG, Brazil.(2020) Lucon, Thiago Nogueira; Costa, Adivane Terezinha; Galvão, Paulo Henrique Ferreira; Leite, Mariangela Garcia Praça; Madeira, Thiago José Augusto; Nogueira, Leonardo BrandãoThe main public water supply in the São Miguel watershed (MG, Brazil) comes from a well-developed karst region, where information about hydraulic communications between caves entrances, sinkholes, recharge and discharge areas are still unknown. The study aims to identify regional hydrogeological processes describing groundwater hydrochemical evolution, interactions between meteoric, surface and ground waters, recharge and discharge sources, and possible hydraulic communications for proper management of water resources. Geophysical data were analyzed and water samples (meteoric, surface, and groundwater) throughout the watershed were collected for stable isotopes (18O and 2 H) and major ions analyzes. Results indicated strong influences of regional geological structures in the karst water flow directions; high concentrations of major ions in the central region of the watershed are common; karstification processes and aquifer recharge are more active during the rainy season, while in the dry season the watershed is supplied by groundwater.Item Assessment of rehabilitation projects results of a gold mine area using landscape function analysis.(2019) Simoni, Bruno Stefan De; Leite, Mariangela Garcia PraçaMining activity is indispensable for the current stage of progress of our civilization. Although it is a temporary activity, its impacts are remarkable, especially with respect to landscape modifications. To mitigate such impacts, the implementation of monitored environmental recovery projects is of fundamental importance. Landscape Function Analysis (LFA) is a multicriteria analysis using remote sensing data and field information, suitable for monitoring the performance of recovery projects in areas degraded by the mining activity. In this work, LFA was used to evaluate the results of 20 years of environmental recovery projects in a gold mine. Ten base maps were developed: Declivity, Vegetation/Physiognomy Stratification, Fractures and faults, Compaction degree/soil structure, Erosion features, Geotechnical stability, Local hydrogeology, Degree of fragment isolation, Soils and Drainage. These were combined in order to give rise to three intermediate maps: Erosion and soil stability, Vegetation and Water. With the union of these three maps, it was possible to create the map with the final analysis of the environmental recovery performance. The technique used allowed the separation of native areas (which obtained the highest scores), recovered and self-sustaining areas (old mine dumps and waste piles) and areas still deficient in environmental recovery, with stability and erosion problems (mining sites and active mine dumps). In addition to allowing the analysis of large areas, the presentation of LFA results on maps facilitates decision-making and the dissemination and understanding of results by the different stakeholders involved.