DEGEO - Departamento de Geologia

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/8

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2003 - 200912010 - 20181

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Tem arquivos: SimAssunto: search.filters.subject.Gullies

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
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    Quantification by numerical simulation of the impact of gullies on the water budget of a basement area, southeastern Brazil.
    (2018) Lima, Péterson Gonçalves de; Bacellar, Luis de Almeida Prado; Drumond, Flávio Nasser
    Many regions of the world are affected by high density of large gullies that can impact on water resources. As these impacts have not been properly evaluated, this study presents a quantification model by numerical simulation of the effect of gullying on the water budget. An active gully of a very eroded region (Bação Complex) was selected and systematically monitored during a hydrological year. The simulation of the gully area by finite element method enabled the quantification of impacts, such as baseflow reduction and groundwater drawdown in the vicinity of this erosional feature. The baseflow reduction, when extrapolated to the whole complex, showed a significant baseflow loss during the dry seasons and an increase of stream flows during the rainy seasons, favouring floods. The numerical simulation results indicate that these modifications are relevant and must be considered when managing aquifers in intensely gullied areas with problems related to water availability.
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    Avaliação de áreas de risco geológico na bacia de Vargem das Flores, municípios de Betim e Contagem - MG.
    (2003) Danderfer Filho, André; Paulo, Jacks Richard de; Bacellar, Luis de Almeida Prado
    This study was carried out in the Vargem das Flores basin, which is located in Betim and Contagem, Minas Gerais State. The principal aim of this research was to study soil erosion by gullies, which occurred with heterogeneous concentrations throughout this basin. Field data and the remote sensing products allowed the characterization and mapping: of geology, geomorphology, gully features and landuses evolution in the last decades. This methodology have been allowing the evaluation of the geological risk.