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Registros recuperados: 7
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Agricultural exploitation impact on the quality of natural waters in the trout-breeding region of the Mantiqueira ecological corridor. Repositório Alice
SANTOS, G. M. dos; ASSAD, M. L. R. C.; HOTT, M. C.; OTENIO, M. H..
2014
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Water classification; Water contamination; Monitoring; Geo-referencing.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1011682
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Agricultural exploitation impact on the quality of natural waters in the trout-breeding region of the Mantiqueira ecological corridor Biological Sciences
Santos, Gabriele Medeiros dos; Empresa Brasileira de Pesquisa Agropecuária; Assad, Maria Leonor Ribeiro Casimiro Lopes; Empresa Brasileira de Pesquisa Agropecuária; Hott, Marcos Ciccarini; Empresa Brasileira de Pesquisa Agropecuária; Otenio, Marcelo Henrique; Embrapa Gado de Leite Empresa Brasileira de Pesquisa Agropecuária (Embrapa) Juiz de Fora/MG.
Seasonal assessment of water quality was undertaken in an agricultural cattle-raising and trout-breeding region. Seventeen sites were sampled in ten municipalities close to the Papagaio and Ibitipoca State Parks in Minas Gerais, Brazil. Landsat 5 satellite images and Spotmap mosaic images with resolution of 2.5 m were employed to correlate classes of land use and topographic characteristics with the environmental contamination index of the water bodies at these sites. Results show a change in hydric classification of three sites evaluated. During the rainy season, sites 3, 7 and 17 were classified as class 3 according to CONAMA regulations, whereas the other sites were classified as class 2. During the dry season, sites 10 and 11 belonged to class 3 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.03.00.00-8 water classification; Water contamination; Monitoring; Geo-referencing Ciências Agrárias.
Ano: 2014 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19551
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Agriculture-induced water quality problems in a maize irrigated crop: 2 - atrazine leaching. Repositório Alice
ANDRADE, C. de L. T. de; ALVARENGA, R. C.; KARAM, D.; BORGES JUNIOR, J. C. F..
2007
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Corn; Herbicide; Irrigation; Water contamination; Herbicida.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/490777
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Agriculture-unduced water quality problems in a maize irrigated crop: 1 - nitrogen leaching. Repositório Alice
ANDRADE, C. de L. T. de; ALVARENGA, R. C.; COELHO, A. M.; BORGES JUNIOR, J. C. F. B..
2007
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Corn; Deep percolation; Irrigation; Nitrate; Water contamination.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/490775
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Environmental risk increase due to heavy metal contamination caused by a copper mining activity in Southern Brazil Anais da ABC (AABC)
BIDONE,EDISON D.; LAYBAUER,LUCIANO; CASTILHOS,ZULEICA C.; MADDOCK,JOHN L..
The Camaquã Copper Mines (CCM) were the main sulphide deposit in Southern Brazil and have been in operation from last century to 1996. To evaluate water contamination and environmental risk increase by heavy metals from mining operations, two points on the João Dias Creek were sampled (Station 1, background area and Station 2, contaminated area). Mining activity increased the natural weakly heavy metal fluxes by approximately 5424 kg. ( ~ 60%) of the total metal flux, 1542 kg. ( ~ 49%) of dissolved and 3881 kg ( ~ 66%) of particulate metal flux. Total metal flux of anthropic origin was mostly due to Fe followed by Cu > Zn > Mn whereas Cd, As and Pb fluxes were negligible. The potential human health hazards and risk assessment related to daily intake...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water contamination; Environmental risk; Heavy metals; Copper mining.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000200011
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Risk assessment of water contamination by agrochemical in watershed. Repositório Alice
LUIZ, A. J. B.; NEVES, M. C.; GOMES, M. A. F.; SPADOTTO, C. A.; LUCHIARI JUNIOR, A..
Intensive agricultural systems are based on the heavy use of pesticides and fertilizers. This fact offer a high contamination risk of the natural resources, even when adequate technical of storage, application and disposal are used. Brasil used in 1993 61,845t of active ingredients of pesticides (insecticide, fungicide and herbicide) and 11,424,635 t of fertilizers (phosphorus, nitrogen and potassium), being the application rates variable as a function of region and crop plants. The use was very high, for example, in corn, cotton, orange, potato, soybean, sugar-cane and tomato in the east region of Rio Parana basin. The risk of agrochemical contamination of the natural resource varies according to the environment and product properties, therefore it is...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Intensive agriculture; Water contamination; Geographic information system; Ribeirao Preto; Agrochemicals; Environment; Fertilizers; Brazil; Natural resources; Pesticides; Water quality.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12545
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Vegetal test-system investigation on cytotoxicity of water from urban streams located in the northeastern region of Maringá, Paraná State, Brazil - doi: 10.4025/actascibiolsci.v33i1.4924 Biological Sciences
Düsman, Elisângela; Universidade Estadual de Maringá; Faria, Juliana Sala de; Universidade Estadual de Maringá; Toledo, Fabiana; Universidade Estadual de Maringá; Mazeti, Camila Montoro; Universidade Estadual de Maringá; Gonçalves, Marcus Eduardo Kamide; Universidade Estadual de Maringá; Vicentini, Veronica Elisa Pimenta; Universidade Estadual de Maringá.
The increase in consumption of water, the destruction of riparian forests and the pollution caused by humans, have severely degraded several water resources. Numerous stream crisscross the city of Maringá, Paraná state, Brazil and most of their sources are scattered through the urban region. Current analysis assesses the cytotoxic potential of water from the Corregozinho, Isalto, Morangueira and Ozório streams, located within the high-populated northeastern region of Maringá, inside the urban perimeter. Root meristematic cells of Allium cepa were used as test-system. The roots of onion were prepared by Feulgen’s reaction and stained with Schiff's reagent. Results showed that there were no statistically significant changes evaluated by the chi-square test...
Palavras-chave: 2.02.00.00-5; 2.02.06.00-3 environmental mutagenesis; Water contamination; Allium cepa Mutagênese environmental mutagenesis; Water contamination; Allium cepa.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4924
Registros recuperados: 7
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