|
|
|
| Registros recuperados: 14 | |
|
| |
|
|
| Waltrick, Josiane C. N.; Goularte, Gabriel D.; Favaretto, Nerilde; Souza, Luiz C. P.; Dieckow, Jeferson; Pauletti, Volnei; Vezzani, Fabiane M.; Almeida, Luciano; Minella, Jean P. G.. |
| Best management practices at watershed scale are essential to mitigate water pollution. The objectives of this study were: (1) to estimate the P-index in a small watershed with intensive agricultural use applying five P-index versions at three scales (watershed, sub-basin and agricultural field); (2) to assess the effect of the connectivity factors (distance between the agricultural field and the stream and width of riparian native vegetation) in estimating the risk of P loss. The five P-index versions resulted in a similar risk of P loss, 75 to 83 % of the whole watershed scale (agricultural plus forest areas) was classified as low or very low risk for P loss. At the agricultural area scale, 79 to 100 % of this area was classed as high and very high risk... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil Science P-index; P risk assessment; Water quality; Catchment; Riparian vegetation; Runoff. |
| Ano: 2018 |
URL: http://www.jarts.info/index.php/jarts/article/view/2018010454110 |
| |
|
|
| André Luiz Rezende, Ferreira; Getulio Teixeira, Batista; Paulo, Fortes Neto. |
| Este artigo constitui-se da revisão de artigos científicos, livro e revista com o intuito de fazer uma análise das áreas de captação da água de chuva. Inicialmente foi feito um estudo das reservas de água no planeta, simbolismo nas religiões, consumo humano, uso sustentável, demanda, uso irracional e problemas da escassez. Em seguida, foi abordado o uso do telhado convencional com melhor inclinação e escoamento, tipos de cobertura com melhor coeficiente de escoamento (argamassa de cimento e areia, telha de cerâmica, telha de fibrocimento, lona plástica de polietileno), telhado verde (retenção, escoamento, qualidade da água) e chão (contra-piso, estradas, encostas) como áreas de captação. |
| Tipo: Article |
Palavras-chave: Água de chuva; Escoamento; Captação; Catchment; Flow; Rainwater. |
| Ano: 2011 |
URL: http://hdl.handle.net/2315/173 |
| |
|
| |
|
|
| Belloir, Jerome. |
| The coastline has many activities related to water quality such as bathing activities. Coastal catchments are known to be source of microbial input to the marine environment, their flows and runoff bringing important quantities of sediment, bacteria and other particles. Thus, a network of monitoring and modeling may be necessary to prevent economic losses such as a closure of beaches due to contamination. Hence, within the framework of project GIRAC, a modeling of river and E. coli flow in the Sainte-Anne catchment was developed. To implement the model AVSWAT on the catchment, a data collection (stream gauging, E. coli analyses) and work on GIS was necessary. The aim of this study is the hydrological and microbiological characterization of the catchment.... |
| Tipo: Text |
Palavras-chave: Bassin versant; Débits; Escherichia coli; SIG; Sainte-Anne; Catchment; River flow; Escherichia coli; GIS; Sainte-Anne. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00044/15571/12969.pdf |
| |
|
|
| Alcaraz,Samantha A.; Sannier,Christophe; Vitorino,Antonio C. T.; Daniel,Omar. |
| The objective of this work was to compare methodologies for the automatic generation of limits and drainage networks, using a geographical information system for basins of low relief variation, such as the Dourados catchment area. Various data/processes were assessed, especially the ArcHydro and AVSWAT interfaces used to process 50 m resolution DTMs formed from the interpolation of digitalized contour lines using ArcInfo, ArcView and Spring GIS, and a 90 m resolution SRTM DTM acquired by interferometry radar. Their accuracy was estimated based upon the pre-processing of small basic sub-basin units of different relief variations, before applying the best combinations to the entire Dourados basin. The accuracy of the automatic stream network generation and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Watershed; Catchment; Geographic information systems. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000400001 |
| |
|
| |
|
| |
|
|
| MARTÍNI, A. F.; FAVARETTO, N.; DE BONA, F. D.; DURÃES, M. F.; SOUZA, L. C. de P.; GOULARTE, G. D.. |
| Worldwide, agriculture is considered one of the main activities that influence water quality. The objective of this work was to evaluate the influence of soil use and management on water quality at the small watershed scale, in Southern Brazil. One watershed is characterized by production of annual crop seeds under no-tillage (zero tillage), with crop rotation and with terraces (Sarandi watershed?SW), while the other is characterized by production of grains in the summer and pasture with grazing in the winter, under no-tillage, without crop rotation and without terraces (Coxilha watershed?CW). Flow and climatic data were measured during 2 years. Water samples were manually taken at precipitation events and base flow over 1 year for laboratory analysis.... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Catchment; Best management practices; Crop production; No-tillage; Water conservation. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1127856 |
| |
|
| |
|
|
| Bougeard, Morgane; Le Saux, Jean-claude; Perenne, Nicolas; Le Guyader, Soizick; Pommepuy, Monique. |
| During rainstorms, watersheds can introduce large amounts of faecal pollution into the rivers and sea, leading to shellfish contamination. In this study, we assessed Escherichia coli fluxes from a catchment, and their impact on estuarine water quality, using two assembled models. For the catchment, the agro-hydrological model SWAT was implemented integrating land uses, soil, topography, rainfall and other climatic data on Daoulas watershed (France). Initially, the SWAT model was calibrated and validated for river flow rates, and results were found satisfactory. Subsequently, different faecal contamination sources were integrated into the model: point sources (WWTP discharges into rivers) and non-point sources (manure spreading on fields). During rainfall... |
| Tipo: Text |
Palavras-chave: Modeling; SWAT; MARS; E. coli; Shellfish; Catchment; Estuary. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00066/17748/15270.pdf |
| |
|
| |
|
|
| De Wit, Rutger; Leibreich, J; Vernier, F; Delmas, F; Beuffe, H; Maison, P; Chossat, J; Laplace Treyture, C; Laplana, R; Clave, V; Torre, M; Auby, Isabelle; Trut, Gilles; Maurer, Daniele; Capdeville, P. |
| Nitrogen loading to the Bassin d'Arcachon coastal lagoon (SW France) was evaluated by studying land-use and nitrogen output in its 3001 km(2) catchment. At present, the catchment is dominated by forestry (79%), while intensive agriculture occupies 9% of the surface. The N-output of two hydrological subunits, i.e. the Tagon subunit dominated by pine forestry and the Arriou 11 subunit comprising both forestry and intensive agriculture, were monitored for a seven year period (1996-2002). From these observations it was calculated that forestry contributes on average 1.6 kg total N ha(-1) yr(-1), which is dominated by organic nitrogen (DON+PON are 70% of N). On an areal basis, intensive agriculture contributes 26 times more than forestry, i.e. 41.6 kg total N... |
| Tipo: Text |
Palavras-chave: Macroalgae; Seagrasses; Nitrogen loading; Catchment. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-757.pdf |
| |
|
|
| Ramos, Michele Ribeiro; Departamento de Solos e Engenharia Agrícola, Universidade Federal do Paraná, Curitiba, PR, Brazil; Favaretto, Nerilde; Departamento de Solos e Engenharia Agrícola, Universidade Federal do Paraná, Curitiba, PR, Brazil; Dieckow, Jeferson; Departamento de Solos e Engenharia Agrícola, Universidade Federal do Paraná, Curitiba, PR, Brazil; Dedeck, Renato Antonio; Embrapa Floresta, Colombo, PR, Brazil; Vezzani, Fabiane Machado; Departamento de Solos e Engenharia Agrícola, Universidade Federal do Paraná, Curitiba, PR, Brazil; Almeida, Luciano; Departamento de Economia Rural e Extensão, Universidade Federal do Paraná, Curitiba, PR, Brazil; Sperrin, Matthew; Centre for Health Informatics, University of Manchester, Manchester, United Kingdom. |
| Agricultural systems with conventional tillage and intensive use of agrochemicals, especially those on high slopes and with shallow soils, have the potential to release pollutants. This study aimed at evaluating the soil, water and nutrient lost via agricultural runoff in large plots (small catchments) under conventional and organic farming of vegetables as well as under forest (control) system in a Cambisol in the Campestre catchment. Samples of runoff were collected biweekly for one year through a Coshocton wheel. The soil and water losses from the conventional farming were 218 and 6 times higher, respectively, than forest. Under organic farming the soil and water losses were 12 and 4 times higher, respectively, than forest. However the soil losses (0.5... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil Science farming systems; Catchment; Runoff; Manure; Phosphorus; Nitrogen. |
| Ano: 2014 |
URL: http://www.jarts.info/index.php/jarts/article/view/2014020344878 |
| |
| Registros recuperados: 14 | |
|
|
|
