Vitor Vieira Vasconcelos

Hydrographic and hydrogeological basin of Entre-Ribeiros: probable recharge zone delimitation and environmental impact assessment

The probable recharge zone delimitation of Entre-Ribeiros Basin (Northwest of the state of Minas Gerais / Brazil) is proposed in this study. The delimitation is based upon stratigraphy, geomorphology, geo-environmental domains and hydrogeology studies. Combining the recharge zone map with the land use variation between 1975 and 2008, the occupation trends of possible recharge zones are identified. Concluding, the environmental impacts for this basin are discussed.

Estimation of flow components by recursive filters: case study of Paracatu River Basin (SF-7), Brazil

The quantification of flow components is important for water resource management. The base, interflow, and runoff flows of nested basins of the Paracatu River (SF-7) were estimated with recursive signal filters in this study. At first, stationary analysis and multivariate gap filling were applied to the flow data. A methodology is presented, proposing filter calibration with the runoff influence and inflection of the recession curve for dry season. Filters are improved with a logic constraint that limits water flow overestimation within algorithm iteration. The results were coherent with previous studies and with hydrogeological and climatological maps.

Arquitetura de conhecimentos sobre sistemas aquíferos

Apresenta-se a metodologia de Organograma de Rodas de Correlacoes e Impactos – ORCI – como instrumento em contextos de elicitacao e formalizacao de conhecimentos. Toma-se como estudo de caso o conhecimento sobre pesquisa e gestao de sistemas aquiferos, no âmbito do Projeto Gestao de Zonas de Recarga de Aquiferos Partilhadas entre as Bacias de Paracatu, Sao Marcos e Alto Paranaiba – GZRP, financiado pela Fapemig (2007-2009). Propoe-se a construcao de portais digitais de informacao para potencializar as metodologias utilizadas, bem como para interconectar os produtos obtidos a outras plataformas, metodologias e linguagens de Tecnologia da Informacao.

METODOLOGIA PARA CARACTERIZAÇÃO DE ASSINATURA GEOQUÍMICA DE TRAJETOS DE ÁGUA EM ZONAS DE RECARGA DE INTERFLÚVIOS (Methodology for geochemical signature characterization of water paths in interfluves recharge zones)

Apresenta-se uma metodologia para caracterizacao de assinaturas hidrogeoquimicas de partilha de aquifero entre bacias e de trajetos de agua comuns em zonas de recarga de interfluvios. O metodo baseia-se na coleta e analise de caracteristicas quimicas de aguas subterrâneas a partir de fontes. As Bacias de Paracatu, Sao Marcos, Alto Paranaiba e Sao Mateus foram investigadas. nPalavras-chave: hidrogeoquimica; aquiferos; recarga; Noroeste de Minas Gerais. n n nABSTRACT nThis a proposal of a methodology for the characterization of hydrogeochemistry signature of water ways in interflow recharge zones of neighbouring watersheds. The method is based in the systematic sampling and chemical analysis of underground and sources of water. Paracatu, Sao Marcos, Sao Bartolomeu and Alto Paranaiba watersheds were chemically investigated. nKeywords: hydrogeochemistry; aquifer; recharge; Northwestern Minas Gerais State. n n nRESUMEN nSe propone una metodologia para la caracterizacion de las firmas hidrogeoquimicas en los trayectos de las aguas en las zonas de recarga interfluviales. El metodo se basa en el muestreo de las aguas subterraneas y en las fuentes con en el analisis de sus caracteristicas quimicas. Las cuencas de los rios Paracatu, Sao Marcos, Alto Paranaiba y Sao Marcos fueron investigadas. nPalabras clave: hidrogeoquimica; acuiferos; recarga; Noroeste del Estado de Minas Gerais. n n nDOI: 10.5654/actageo2013.0714.0012

Proposição Metodológica para a Cartografia de Solos e Aptidão Agrícola: estudo de caso para a Bacia do Rio Paracatu (Methodological Propositions on Soil Cartography and Agricultural Aptness Cartography: Case Study of Paracatu River Basin)

The soil map and the agricultural aptness map are important tools for Brazilian agricultural and livestock sustainable territorial management. In this paper, the Paracatu River Basin Soil map has been updated, in a 1:250.000 scale. A methodology is proposed to adequate the chart to the new Brazilian Soil Classification System. Thus, the Soil map is applied to develop an agricultural aptness map, via a new adjusted approach to FAO/Brazilian System. The maps Will be useful for the sustainable planning of the basin. The proposed agricultural aptness methodology can better conciliate the agriculture with the environmental conservation. Thus, it is possible to replicate the methodology to other regions.

ADAPTAÇÕES METODOLÓGICAS INTER-ESCALARES DE ZONEAMENTOS AMBIENTAIS A BACIAS HIDROGRÁFICAS AGRÁRIAS DO SUDESTE BRASILEIRO

POLLINATOR FORAGING STRATEGY IN Galactia peduncularis (BENTH.) TAUB. (LEGUMINOSAE: PAPILIONOIDEA) IN THE PARQUE ESTADUAL DA SERRA DE CALDAS NOVAS BRAZIL The way the animals look for food is an important characteristic of their behavior. The optimal foraging theory is based on the existence of a balance between costs and benefits of these behavioral decisions. The present study aimed to evaluate the behavior of the pollinator in response to increased availability of floral resources. The experiment was conducted in a recently burned Cerrado area (Campo rupestre) in the State Park of Serra de Caldas Novas , located in the municipalities of Caldas Novas and Rio Quente Brazil. The species chosen to test our hypothesis was Galactia peduncularis (Benth.) Taub. (Leguminosae: Papilionoidea). 17 pairs of specimens were selected with a number of flowers, and the individuals of each pair were spaced by about 2m. In these pairs, one of them was considered the focal, and the other, the isolated. To test possible differences in pollination between isolated plants and focus, we performed two randomization tests: a test binary (TB), where all pairs were analyzed and verified the number of times where the focus on the individual floral visits were higher than the number of visits in isolated. According to the data analyzed, floral visitors preferred to use plants that could provide a greater amount of floral resources so that the number of visitors varied positively with the increment of flowers. Plants with many flowers can provide a greater amount of food in one location so that visitors do not need to flower around for long distances in search of meeting their energy needs.