Nonpoint Source
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Phosphorus dynamics in a highly polluted urban drainage channel-shallow reservoir system in the Brazilian semiarid
Abstract: This paper investigates phosphorus dynamics in a highly polluted system composed of a drainage channel followed by a shallow reservoir in the city of Fortaleza, Brazilian semiarid. During the dry season, significant non-point source loads of total phosphorus originated from residences unconnected to sewers were identified along the channel, resulti
An. Acad. Bras. Ciênc.. Publicado em: 19/08/2019
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2. Managing agricultural phosphorus to minimize water quality impacts
ABSTRACT Eutrophication of surface waters remains a major use-impairment in many countries, which, in fresh waters, is accelerated by phosphorus (P) inputs from both point (e.g., municipal waste water treatment plants) and nonpoint sources (e.g., urban and agricultural runoff). As point sources tend to be easier to identify and control, greater attention has
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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3. Assessing the sources of high fecal coliform levels at an urban tropical beach
Recreational water quality is commonly assessed by microbial indicators such as fecal coliforms. Maceió is the capital of Alagoas state, located in tropical northeastern Brazil. Its beaches are considered as the most beautiful urban beaches in the country. Jatiúca Beach in Maceió was found to be unsuitable for bathing continuously during the year of 2011.
Braz. J. Microbiol.. Publicado em: 27/10/2015
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4. Clustering of water bodies in unpolluted and polluted environments based on Escherichia coli phylogroup abundance using a simple interaction database
Different types of water bodies, including lakes, streams, and coastal marine waters, are often susceptible to fecal contamination from a range of point and nonpoint sources, and have been evaluated using fecal indicator microorganisms. The most commonly used fecal indicator is Escherichia coli, but traditional cultivation methods do not allow discrimination
Genet. Mol. Biol.. Publicado em: 03/11/2014
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5. Caracterização ambiental e estimativa da produção de cargas difusas da área de drenagem da represa de Itupararanga, SP / Environmental characterization and estimative of diffuse pollution of Itupararanga watershed, SP
The use of satellite images has improved the study of the land use dynamics. Land cover mapping have become fundamental tools in the assessment of landscape changes caused by human action and its influence on regional and urban planning. Computation tools such as Geographic Information Systems and hydrological models have supported these findings. The hydrol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012
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6. Identificação dos sistemas de produção agropecuária do arenito caiuá sujeitos a erosão utilizando o modelo AGNPS
The series of impacts due to the inadequate exploitation of natural resources by agriculture produces, among other effects, the erosion of the soils, which causes serious damage to the society through the reduction of its productive capacity and the continuous contamination of surface water with sediments, material and organic matter, chemical products and n
Publicado em: 2009
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7. Modelo SWAT2005 aplicado Ãs sub-bacias dos rios Conrado e Pinheiro â Pato Branco-PR / Model SWAT2005 aplicability to conrado and pinheiro river watersheds - Pato Branco/PR
O desenvolvimento de modelos hidrolÃgicos capazes de predizer o impacto das fontes difusas de poluiÃÃo e do uso e ocupaÃÃo do solo na qualidade das Ãguas, superficiais e subterrÃneas, tem sido de grande auxÃlio no estudo de agroecossistemas agrÃcolas. Com esse objetivo, foi utilizado o modelo Soil and Water Assessment Tool (SWAT 2005), para avaliar
Publicado em: 2008
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8. Avaliação do risco de contaminação de mananciais hídricos para o abastecimento: o caso da bacia da barragem do descoberto
In catchments where the threat of impairment is due to non-point pollution, identifying the critical areas that contribute a large amount of pollutants is of paramount importance for the sustainable development of the watershed. Often resources for catchments management are poor and there is no way to establish a comprehensive monitoring system or to calibra
Publicado em: 2007
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9. Quantification of impervious surfaces in urban areas using remote sensing techniques / Quantificação das superfícies impermeáveis em áreas urbanas por meio de sensoriamento remoto
Impervious surface coverage growth has direct consequences in quantity and quality of stormwater runoff, such as floods and nonpoint source pollution. The quantification of basins imperviousness makes possible to use it as a water quality indicator for urban areas and as an important planning and managing instrument in the urban water resources management sy
Publicado em: 2006
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10. AnÃlise multivariada na identificaÃÃo dos fatores determinantes da qualidade da Ãgua na Bacia HidrogrÃfica do Rio Jaibaras-Cearà / Analysis multivariate in the identification of the determinative factores of the quality of the water in the watershed of Rive Jaibaras-CearÃ.
Aiming to identify the apportionment of pollution sources/factors with a view to get better information about the water quality at Jaibaras watershed, a research composed of three steps was developed. In the first step (Step I), it was identified the water pollution sources at the upland of Jaibaras watershed until Ayres de Souza dam. The survey occurred fro
Publicado em: 2006
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11. A WATERSHED INFORMATION SYSTEM (WIS) FOR WATER QUALITY ANALYSES
Assessments of water quality in surface water bodies are increasingly incorporating both point and non-point pollutant sources. Water quality constituents are transported in the water as well as on the sediments. Predictions of constituent concentrations in the water and on the sediments require simulation models of water and sediment transport processes ove
Publicado em: 2005
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12. A utilização do modelo WinHSPF no estudo das cargas difusas de poluição da Bacia do Ribeirão da Estiva, SP. / The use of WinHSPF model in the study of nonpoint sources in Ribeirão da Estiva Basin s, SP.
Embora no Brasil já se reconheça a importância do aporte de cargas difusas como um dos principais responsáveis pela deterioração da qualidade das águas, faltam ferramentas, informações e maiores estudos a respeito, para que, como nos Estados Unidos, a legislação passe a regulamentar esta de fonte de poluição. O presente trabalho teve como objeti
Publicado em: 2003