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A conservação de bacias e os desafios para a sustentabilidade da agricultura. Infoteca-e
FIGUEIREDO, R. de O.; GREEN, T. R..
Resumo: Esta publicação aborda a complexidade e os desafios para que se alcance a sustentabilidade no uso da terra, no tocante à conservação dos recursos hídricos e respectivas bacias hidrográficas. Trata da dinâmica de alterações nos processos biogeoquímicos e hidrológicos presentes nas bacias onde o ecossistema natural é modificado. Considera, também, as variações temporais e espaciais distintas, dependendo das características biofísicas e biogeoquímicas originais da bacia, ao lado do uso da terra presente. Os autores abordam como e porque a bacia hidrográfica deve ser considerada a unidade de estudo primordial nas análises ambientais que visam a conservação de recursos hídricos. São, assim, considerados os processos naturais, o manejo agropecuário, a...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Sustentabilidade ambiental; Bacia Hidrográfica; Uso da Terra; Qualidade da Água; Agricultural watersheds; Watersheds; Land use; Land use change; Water quality.
Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112886
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A DYNAMIC ANALYSIS OF THE IMPACT OF WATER QUALITY POLICIES ON IRRIGATION INVESTMENT AND CROP CHOICE DECISIONS AgEcon
Wu, JunJie; Mapp, Harry P., Jr.; Bernardo, Daniel J..
A dynamic model is developed to analyze farmers' irrigation investment and crop choice decisions under alternative water quality protection policies. The model is applied to an empirical example in the Oklahoma High Plains. The choices of crops and irrigation systems and the resulting levels of irrigation, income, and nitrogen runoff and percolation are simulated over a ten-year period. An effluent tax on nitrogen runoff and percolation is shown to be effective in reducing nitrate pollution. The efficacy of cost sharing in adopting modern irrigation technologies and restrictions on irrigation water use depends on soil type. A tax on nitrogen use is shown to be the least effective policy.
Tipo: Journal Article Palavras-chave: Crop selection; Dynamic optimization; Irrigation investment; Water quality; Crop Production/Industries.
Ano: 1994 URL: http://purl.umn.edu/15167
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A framework for analyzing socioeconomic, health and environmental impacts of wastewater use in agriculture in developing countries AgEcon
Hussain, Intizar; Raschid, Liqa; Hanjra, Munir A.; Marikar, Fuard; van der Hoek, Wim.
Tipo: Working or Discussion Paper Palavras-chave: Waste water management; Environmental degradation; Waterborne diseases; Water quality; Irrigation practices; Aquaculture; Economic analysis; Social aspects; Health; Environmental aspects; Agriculture; Developing countries; Policy; Agricultural and Food Policy; Agricultural Finance; Environmental Economics and Policy; Health Economics and Policy; Land Economics/Use; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/92775
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A hydropedological approach to a mountainous Clayey Humic Dystrudept in the Mantiqueira Range, southeastern Brazil Scientia Agricola
Pinto,Leandro Campos; Mello,Carlos Rogério de; Norton,Lloyd Darrell; Poggere,Giovana Clarice; Owens,Phillip Ray; Curi,Nilton.
ABSTRACT: The Mantiqueira Range region is one of the most important headwaters in southeastern Brazil. In this context, the relationship between pedology and hydrology has been debated and analyzed in recent years, contributing to the creation of a multidisciplinary science call hydropedology. Therefore, the aim of this study was to evaluate the hydropedological properties of a mountainous Clayey Humic Dystrudept in the Mantiqueira Range region, in the state of Minas Gerais, Brazil, comparing two land-uses, native forest and pasture. The hydraulic conductivity results demonstrated that native forest (MFO) has a strong influence on this parameter, offering conditions for movement of water in the soil that are more adequate in this profile than in pasture....
Tipo: Info:eu-repo/semantics/article Palavras-chave: S index; Saturated hydraulic conductivity; Soil pore size distribution; Soil erosion; Water quality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100060
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A review of water quality and pollution studies in Tanzania OceanDocs
Mohammed, S.M..
Institute of Marine Sciences Zanzibar
Tipo: Journal Contribution Palavras-chave: Water quality; Water pollution.
Ano: 2002 URL: http://hdl.handle.net/1834/741
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A Watershed-Based Economic Model of Alternative Management Practices in Southern Agricultural Systems AgEcon
Paudel, Krishna P.; Hite, Diane; Intarapapong, Walaiporn; Susanto, Dwi.
We investigated the environmental impacts of alternative cultural practices within a watershed under different water quality standards. We used experimental data on nutrient runoff to determine the optimal amount of broiler litter application in hay production in Louisiana. To compensate for the lack of experimental data, we used biophysical simulation models to find the optimal combination of agricultural best-management practices in a watershed in Mississippi. The results indicated that stricter environmental standards lower total profit potential and litter utilization.
Tipo: Journal Article Palavras-chave: Broiler litter; Cropping systems; Optimization; Watershed level modeling; Water quality; C6; Q1; Q25; D21.
Ano: 2003 URL: http://purl.umn.edu/43213
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ACCOUNTING FOR SPATIAL CHARACTERISTICS OF WATERSHEDS IN EVALUATING WATER POLLUTION ABATEMENT POLICIES AgEcon
Qiu, Zeyuan; Prato, Anthony A..
This study evaluates three agricultural nonpoint pollution abatement policies: regulating the spatial pattern of agricultural activities, ambient tax, and abatement tax/subsidy. All three policies incorporate spatial characteristics of agricultural emission loading and movement for an agricultural watershed in the Midwest. The effects of spatial variation in natural conditions and landscape features on agricultural emissions and crop yield are evaluated using a newly developed biophysical simulation model and experimental data. While the policies are equally cost effective in reducing agricultural nonpoint source pollution, their implementation feasibility is quite different.
Tipo: Journal Article Palavras-chave: Atrazine; Environmental policy; Nonpoint pollution; Simulation; Watershed management; Water quality; Environmental Economics and Policy.
Ano: 1999 URL: http://purl.umn.edu/15135
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Action des epandages de craie (ou CaCO3) sur les vases des claires et des parcs ostreicoles. ArchiMer
Feuillet, Michelle; Gouleau, Dominique.
Tipo: Text Palavras-chave: Water quality; Mineralization; Mud; Oyster pond; Chalk spreeding.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/1977/publication-1993.pdf
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Adaptive Management of the Water Cycle on the Urban Fringe: Three Australian Case Studies Ecology and Society
Gilmour, Alistair; Macquarie University; agilmour@gse.mq.edu.au; Walkerden, Greg; Wyong Shire Council; gregw@acay.com.au; Scandol, James; University of Sydney; jscandol@bio.usyd.edu.au.
Our group at Macquarie University has run three adaptive management projects in New South Wales, Australia. Their objectives were: (1) to evaluate water cycle management strategies to minimize impacts of urban development on water quality in the Hawkesbury-Nepean basin; (2) to evaluate development planning policies to minimize water quality impacts on a series of coastal lakes; and (3) to carry out a preliminary assessment of the potential impacts of greater recreational use of Sydney water catchments. These projects are examined to evaluate the contribution of the adaptive management approach to water cycle management on the urban fringe in New South Wales. The role of the adaptive management approach in education, as a negotiation process, and in policy...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive management; Conservation biology; Ecosystem management; Sustainability transition; Sustainable development; Water quality; Watershed management..
Ano: 1999
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Aeromonas presence in drinking water from collective reservoirs and wells in peri-urban area in Brazil BJM
Razzolini,Maria Tereza Pepe; Günther,Wanda Maria Risso; Martone-Rocha,Solange; Luca,Heloísa Duarte de; Cardoso,Maria Regina Alves.
Aeromonas genus is considered an emerging pathogen and its presence in drinking water supplies is a reason to public health concern. This study investigated the occurrence of Aeromonas in samples from collective reservoirs and wells used as drinking water sources in a peri-urban area. A total of 35 water samples were collected from collective reservoirs and 32 from wells bimonthly, from September 2007 to September 2008. Aeromonas spp determination was carried out using a Multiple-Tube Technique. Samples were inoculated into alkaline peptone water and the superficial film formed was transferred to blood agar plates amended with ampicillin. Typical Aeromonas colonies were submitted to a biochemical screening and then to biochemical tests for species...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeromonas; Peri-urban area; Water quality.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300020
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Agricultura biossalina: desafios e alternativas para o uso de águas salobras e salinas no semiárido brasileiro. Infoteca-e
PORTO, E. R.; HERMES, L. C.; FERREIRA, R. S.; VEIGA, H. P.; SAIA, A..
Resumo: A publicação apresenta e descreve alguns desafios e alternativas técnicas para o uso de águas salobras e salinas - um dos recursos naturais importantes do semiárido brasileiro - por meio da dessalinização ou de práticas culturais que minimizem o efeito da salinidade acumulada nos solos da região usados na agricultura.
Tipo: Documentos (INFOTECA-E) Palavras-chave: Região semiárida; Agricultura biossalina; Água Salobra; Água Salina; Agricultura; Irrigação; Seca; Qualidade da Água; Dessalinização; Saline water; Brackish water; Semiarid zones; Semiarid soils; Water quality; Irrigation; Desalination.
Ano: 2019 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1113051
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Agricultura e qualidade da agua: contaminacao da agua por nitrato. Infoteca-e
RESENDE, A. V. de.
bitstream/CPAC-2009/24718/1/doc_57.pdf
Tipo: Documentos (INFOTECA-E) Palavras-chave: Contamination; Health.; Contaminação; Fósforo; Impacto Ambiental; Nitrogênio; Poluição da Água; Saúde.; Recurso Hídrico; Qualidade da Água; Environmental impact; Eutrophication; Nitrates; Nitrogen; Phosphorus; Water resources.; Water quality; Water pollution.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546464
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Agricultural Resources and Environmental Indicators, 2006 Edition AgEcon
Wiebe, Keith D.; Gollehon, Noel R..
This is a large file. We have had reports of problems opening the file in Mozilla Firefox. If you have problems, try using Windows Internet Explorer.
Tipo: Report Palavras-chave: ERS; AREI; Agricultural economics; Natural resources; Land; Land use; Land values; Land ownership; Water use; Irrigation; Water quality; Genetic resources; Biotechnology; Agricultural research; Agricultural productivity; Global resources; Soil conservation; Soil erosion; Pest management; Nutrient management; Animal agriculture; Organic agriculture; Conventional agriculture; Conservation policy; Land retirement; Working lands; Wetlands; Farmland protection; Environmental quality; Farm structure; Farm ownership; Farm management decisions; Farm business; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/7207
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Aluminum-based water treatment residual use in a constructed wetland for capturing urban runoff phosphorus: Column study NWISRL
Ippolito, J.A..
Aluminum-based water treatment residuals (Al-WTR) have a strong affinity to sorb phosphorus. In a proof-of-concept greenhouse column study, Al-WTR was surface-applied at 0, 62, 124, and 248 Mg/ha to 15 cm of soil on top of 46 cm of sand; Al-WTR rates were estimated to capture 0, 10, 20, and 40 years of phosphorus from an urban watershed entering an engineered wetland in Boise, Idaho, USA. Creeping red fescue (Festuca rubra) was established in all columns; one set of columns received no Al-WTR or plants. After plant establishment, once per week over a 12-week period, ~1.0 pore volumes of ~0.20 mg phosphorus/L was added to each column. Infiltration rates were measured, leachate was collected and analyzed for soluble phosphorus, and fescue yield,...
Tipo: Article Palavras-chave: Chemistry; Water management; Water quality.
Ano: 2015 URL: http://eprints.nwisrl.ars.usda.gov/1605/1/1563.pdf
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An Econometric Analysis of the Environmental Benefits Provided by the Conservation Reserve Program AgEcon
Fleming, Ronald A..
Over $1.7 billion has been spent on the Conservation Reserve Program (CRP) since 1985. The purpose of this study is to show that these expenditures have aided the environment. Rather than quantify changes in environmental variables, a spatial econometric model is used to test if CRP enrollments are greater in counties with poorer environmental quality. In seven of nine regions, CRP enrollments are higher in counties with an environmental concern. This positive finding justifies past expenditures by the CRP and supports continued funding as an environmental program. The CRP is targeting current environmental concerns that will lead to future improvement.
Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Econometrics; Environmental quality; Soil erosion; Spatial data; Water quality; Wildlife habitat; Q28; Q58; C31; Q24; Q25.
Ano: 2004 URL: http://purl.umn.edu/43388
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An Examination of the Tradeoff between Net Return, Risk, and Water Quality for Crop Rotations in South Central Kansas AgEcon
Langemeier, Michael R.; Nelson, Nathan; Parajuli, Prem; Perkins, Seth.
This paper determined the optimal crop rotation in South Central Kansas. The model incorporated net return, risk, and water quality. In general, water quality improved as tillage was reduced within a rotation type and by adding an alfalfa rotation. The optimal crop rotation mixes included wheat, grain sorghum, soybeans, and alfalfa.
Tipo: Conference Paper or Presentation Palavras-chave: Water quality; Optimal crop rotation; Risk and return; Farm Management; D24; D81.
Ano: 2010 URL: http://purl.umn.edu/56407
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An integrated social and ecological modeling framework—impacts of agricultural conservation practices on water quality Ecology and Society
Daloğlu, Irem; School of Natural Resources and Environment, University of Michigan; daloglu@umich.edu; Nassauer, Joan Iverson; School of Natural Resources and Environment, University of Michigan; nassauer@umich.edu; Riolo, Rick; Center for the Studies of Complex Systems, University of Michigan; rlriolo@umich.edu; Scavia, Donald; School of Natural Resources and Environment, University of Michigan; Graham Environmental Sustainability Institute, University of Michigan; scavia@umich.edu.
We present a modeling framework that synthesizes social, economic, and ecological aspects of landscape change to evaluate how different agricultural policy and land tenure scenarios and land management preferences affect landscape pattern and downstream water quality. We linked a stylized agent-based model (ABM) of farmers’ conservation practice adoption decisions with a water quality model, the Soil and Water Assessment Tool (SWAT), to simulate the water quality effects of changing land tenure dynamics and different policies for crop revenue insurance in lieu of commodity payments over 41 years (1970–2010) for a predominantly agricultural watershed of Lake Erie. Results show that non-operator owner involvement in land management...
Tipo: Peer-Reviewed Reports Palavras-chave: ABM; Agricultural policy; Agriculture; Conservation practice; Integrated modeling; SWAT; Water quality.
Ano: 2014
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Análisis del comportamiento de la salinidad (intrusión salina) en el sistema Río Guayas Canal de Jambelí como parte del cambio climático OceanDocs
Arreaga Vargas, P..
El presente trabajo permite conocer el comportamiento de la cuña salina en el sistema Río Guayas - Canal de Jambelí, conociendo que el Río Guayas abastece de agua a Guayaquil, puerto principal del país, y a muchas otras poblaciones.
Tipo: Journal Contribution Palavras-chave: Water quality; Sea level; Climatic changes; Salt-wedge estuaries; Salt wedges; Salinity gradients; Irrigation water; River water; Rivers; Water quality; Irrigation water; Rivers; Sea level; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_3958; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_34115.
Ano: 2000 URL: http://hdl.handle.net/1834/2274
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Analyse bacteriologique de l'eau par mesure potentiometrique de la reduction de l'acide lipoique ArchiMer
Charriere, G; Jouenne, T; Junter, G.
A simple potentiometric technique to detect and enumerate the bio-indicators of water contamination is described. The technique consists in measuring the redox potential of a specific culture medium saturated with oxygen where bacteria are incubated in presence of lipoic acid (LA). These micro-organisms reduce LA to dihydrolipoic acid, giving rise to an important potential drop in the system. This potentiometric "signal" reveals the presence of active metabolic bacteria in the medium. The major assets of potentiometric measurements in presence of LA lies in the reliability and intelligibility of the results (the redox phenomenon being qualitatively and quantitatively studied), associated to a very simple technology. Futhermore, this technique is perfectly...
Tipo: Text Palavras-chave: Bacteria; Pollution indicators; Water quality; Microbial contamination; Indicator species; Pollution detection; Redox potential; Titration.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1007.pdf
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Anthropic influence in the water quality of the river basin that supplies the Pato Branco Municipality-PR BABT
Machado,William César Polônio; Becegato,Valter Antonio; Bittencourt,André Virmond Lima.
The Pato Branco river basin, which supplies water to Pato Branco city (70,000 inhabitants) in southwestern Paraná State, was monitored during two hydrological cycles, totaling 22 campaigns at two monitoring stations on the Conrado river: the Conrado station upstream (RC01) and the Conrado station downstream (RC02). The main characteristics of the basin here: area - 29.69 km², length - 9,300 m, height difference - 170 m, declivity - 18.62 m km-1, and concentration time - 102 min. Physico-chemical variables were analyzed, using samples collected after a minimum three-day period without rain. The data set comprising seven variables yielded the following averages respectively for monitoring stations RC01 and RC02: variables that characterized the organic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water quality; Environment; Anthropic influence.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100027
Registros recuperados: 338
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