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Agricultura e recursos hídricos em bacias hidrográficas de diferentes biomas brasileiros: Rede AgroHidro. Infoteca-e
RODRIGUES, L. N..
2010
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Recurso hídrico; Agricultura; Mudanças climáticas; Water source; Watershed; Brazil; Climatic change.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/875123
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Agricultural Drainage and Gulf Hypoxia: Economic Targeting of Farmland to Reduce Nitrogen Loads in a Minnesota Watershed AgEcon
Petrolia, Daniel R.; Gowda, Prasanna H.; Mulla, David J..
Agricultural nitrogen losses are the major contributor to nitrogen loads in the Mississippi River, and consequently, to the existence of a hypoxic, or "dead", zone in the Gulf of Mexico. Focusing on two small agricultural watersheds in southwestern Minnesota, simulation results from the Agricultural Drainage And Pesticide Management (ADAPT) model were combined with a linear-optimization model to evaluate the environmental and economic impact of alternative land-use policies for reducing nitrogen losses. Of particular importance was the study's explicit focus on agricultural subsurface (tile) drainage, which has been identified as the major pathway for agricultural nitrogen losses in the upper Midwest, and the use of drainage-focused abatement policies....
Tipo: Conference Paper or Presentation Palavras-chave: Drainage; Hypoxia; ADAPT; Nitrogen; Watershed; Environmental Economics and Policy.
Ano: 2005 URL: http://purl.umn.edu/19416
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Agricultural Water Security and Instream Flows for Endangered Salmonids in Coastal California's Watersheds AgEcon
Mezzatesta, Mariano; Newburn, David A.; Brozovic, Nicholas.
Many rural landowners within the Western United States do not have access to a secure water supply provided by a major dam or an irrigation district. Such water users must rely instead on groundwater pumping and/or seasonal water flows from tributaries. Some of these agricultural producers choose to store winter stream flows from tributaries within onsite reservoirs to secure their spring/summer water needs. However, regulatory agencies have increased restrictions on surface water storage and diversions to improve instream flows for endangered salmon, thus reducing water security for many landowners not located along the main stem. The majority of salmon habitat is within the tributaries located throughout a watershed. Most research regarding instream...
Tipo: Conference Paper or Presentation Palavras-chave: Instream flow; Salmon; Endangered species; Water; Watershed; Environmental Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/61485
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Análisis de las unidades de riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México. Colegio de Postgraduados
González Covarrubias, Galdino Daniel.
En el presente estudio se realizó el análisis de las Unidades de Riego con aprovechamiento superficial en la Cuenca Lerma Chapala, México, a través de la georrefenciación y caracterización de la infraestructura hidroagrícola, padrón de usuarios y catastro, integrándolos en un Modelo de Sistema de Información Geográfica (SIG). Esto permitió conocer en forma precisa la información relevante de dichas Unidades. Se caracterizaron 1,364 unidades de riego con un total de 56,266 usuarios que detentan 114,975.26 hectáreas. La longitud de la red de conducción es de 2,435 km y la longitud de la red de drenaje es de 2,643 km, y 34,965 estructuras de control. La integración de las capas de información generadas en formato shape-file (*.shp) al Modelo de SIG de la...
Palavras-chave: Modelación; SIG; Riego; Agua; Sustentabilidad; Cuenca; Modeling; GIS; Irrigation; Water; Sustainability; Watershed; Hidrociencias; Maestría Tecnológica.
Ano: 2013 URL: http://hdl.handle.net/10521/2072
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Analysis of land use and occupancy in permanent preservation areas according to the hydrography of Ribeirão Água Fria - Bofete, SP - Brazil REA
Nardini,Rafael C.; Campos,Sérgio; Gomes,Luciano N.; Moreira,Katiuscia F.; Piza,Mariana W. de T..
The use conflicts are determined by the inadequate occupations of the soil, as it is the case of soil occupation inside of permanent preservation areas. This study aimed to determine the classes of the soil use and if there are conflicts inside of permanent preservation areas along the drainage network of the Água Fria Stream watershed, located in Bofete city - São Paulo, Brazil. It locates geographically between the coordinates: 48°09'30" to 48°18'30" longitude WGr., 22°58'30" to 23°04'30" latitude S, with an area of 15242.84 ha. The map of soil use was elaborated through the interpretation directly in the computer screen of satellite digital image. In the orbital data, the study area is inserted in the quadrant A, of image TM/Landsat - 5, orbit 220,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Watershed; Geographic information systems; Soil use.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500013
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Antifungal susceptibility of yeasts isolated from anthropogenic watershed Anais da ABC (AABC)
MILANEZI,ANA C.M.; WITUSK,JOÃO P.D.; VAN DER SAND,SUELI T..
Abstract Yeasts are unicellular fungi widespread in the environment, and studies suggest that there is a positive correlation between yeast and polluted aquatic environments. The aim of this study was to analyze the diversity and resistance of yeasts isolated from water samples collected along the Arroio Dilúvio in Porto Alegre to antifungals. Yeast isolates from the Arroio Dilúvio were subjected to susceptibility assays against antifungals using the minimum inhibitory concentration (MIC) test, and amplification of the ITS1-5.8S-IT2 region; in addition, the ITS-5.8S region was sequenced for some of the isolates. The amplification product was subjected to PCR-RFLP, and the restriction profile allowed the construction of a dendrogram. Susceptibility tests...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Yeast; Antifungal; Watershed; Resistance.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100601
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Assessing the Potential for Payments for Watershed Services to Reduce Poverty in Guatemala AgEcon
Pagiola, Stefano; Zhang, Wei; Colom, Ale.
Payments for Environmental Services (PES) are being increasingly used as conservation instruments, particularly in Latin America. PES programs seek to capture part of the benefits derived from environmental services and channel them to natural resource managers who generate these services, thus increasing their incentive to conserve them. Many have assumed that these payments would go mostly to poor land users, and thus contribute to poverty reduction. There has been little empirical verification of this assumption to date, however. The PES approach was conceptualized as a mechanism to improve the efficiency of natural resource management, and not as a mechanism for poverty reduction. Pagiola et al. (2005) identified three main questions regarding the...
Tipo: Conference Paper or Presentation Palavras-chave: Payments for Environmental Services (PES); Watershed; Poverty; Guatemala; Environmental Economics and Policy; International Development.
Ano: 2008 URL: http://purl.umn.edu/42932
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Bilan des connaissances sur la qualité de l'eau dans la zone du polder conchylicole de Bouin - Projet LEAUPOLD ArchiMer
Hatt, Philippe-jacques; Stavrakakis, Christophe; Buchet, Vincent; Dupuy, Beatrice.
Le polder conchylicole de Bouin (Vendée) est le principal bassin français de production de naissains d’huîtres creuses issus d’écloseries. Depuis 2007, et malgré l’installation de dispositifs de traitement de l’eau, des anomalies dans les élevages voire des mortalités affectent la production des écloseries et nurseries du secteur, ainsi que celle de microalgues en grand volume d'une entreprise spécialisée. Les observations des professionnels orientent la recherche de la cause de ces mortalités sur les contaminants chimiques, notamment les pesticides utilisés par l'agriculture, dont les exploitations du polder agricole, qui jouxtent le polder conchylicole. Comme l'ont montré de nombreux travaux, certains de ces produits altèrent la qualité de l’eau de mer...
Tipo: Text Palavras-chave: Bassin Loire-Bretagne; Baie de Bourgneuf; Environnement; Conchyliculture; Qualité de l'eau; Pollution chimique; Bassin versant; Mortalité; Zone côtière; Loire-Bretagne district; Bourgneuf bay; Environment; Shellfish aquaculture; Water quality; Chemical pollution; Watershed; Mortality; Coastal zone.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00280/39165/37726.pdf
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Can land use changes alter carbon, nitrogen and major ion transport in subtropical brazilian streams? Scientia Agricola
Silva,Daniela Mariano Lopes da; Ometto,Jean Pierre Henry Balbaud; Lobo,Gré de Araújo; Lima,Walter de Paula; Scaranello,Marcos Augusto; Mazzi,Edmar; Rocha,Humberto Ribeiro da.
Several studies in tropical watersheds have evaluated the impact of urbanization and agricultural practices on water quality. In Brazil, savannas (known regionally as Cerrados) represent 23% of the country's surface, representing an important share to the national primary growth product, especially due to intense agriculture. The purpose of this study is to present a comprehensive evaluation, on a yearly basis, of carbon, nitrogen and major ion fluxes in streams crossing areas under different land use (natural vegetation, sugar cane and eucalyptus) in a savanna region of SE Brazil. Eucalyptus and sugar cane alter the transport of the investigated elements in small watersheds. The highest concentration of all parameters (abiotic parameters, ions, dissolved...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Savanna; Nutrients; Watershed; Sugar cane; Eucalyptus.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000400002
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Can Payments for Ecosystem Services Contribute to Adaptation to Climate Change? Insights from a Watershed in Kenya Ecology and Society
Mwangi, John K.; Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya; PhD Fellow, World Agroforestry Centre (ICRAF), Nairobi, Kenya ; joymwa86@yahoo.com; Namirembe, Sara; World Agroforestry Centre (ICRAF), Nairobi, Kenya ; s.namirembe@cgiar.org.
Climate change presents new challenges for the management of social-ecological systems and the ecosystem services they provide. Although the instrument of payments for ecosystem services (PES) has emerged as a promising tool to safeguard or enhance the provision of ecosystem services (ES), little attention has been paid to the potential role of PES in climate change adaptation. As an external stressor climate change has an impact on the social-ecological system in which PES takes place, including the various actors taking part in the PES scheme. Following a short description of the conceptual link between PES and adaptation to climate change, we provide practical insights into the relationship between PES and adaptation to climate change by presenting...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptation; Climate change; Climate variability; Payments for ecosystem services; Watershed.
Ano: 2014
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Carbon and Nitrogen in the Lower Basin of the Paraíba do Sul River, Southeastern Brazil: element fluxes and biogeochemical processes. Repositório Alice
FIGUEIREDO, R. de O.; OVALLE, A. R. C.; REZENDE, C. E. de; MARTINELLI, L. A..
Abstract: The study was conducted in the lower basin of the Paraíba do Sul River (PSR), in which 57,000 km2 of the basin is located in the Brazilian states of São Paulo, Minas Gerais and Rio de Janeiro. We proposed to identify the main sources of C and N fluxes in the PSR waters, to evaluate biogeochemical processes in the watershed, and to estimate C and N riverine loads to the Atlantic Ocean in the context of the sugarcane plantation expansion for ethanol production. Riverine water samples were collected at seven stations along 12 months. Physicochemical and limnological parameters, as well as discharge, were measured together with organic and inorganic C and N species in the dissolved and suspended particulate material. C and N concentrations in bed...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Biogeoquímica; Cargas fluviais; Impactos antrópicos; Carbono; Nitrogênio; Agricultura; Impacto ambiental; Bacia hidrográfica; Biogeochemistry; Watershed; Agricultura; Environmental impact.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/899035
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CLIMATE CHANGE SENSITIVITY ASSESSMENT ON UPPER MISSISSIPPI RIVER BASIN STREAMFLOWS USING SWAT AgEcon
Jha, Manoj K.; Arnold, Jeffrey G.; Gassman, Philip W.; Gu, Roy.
The Soil and Water Assessment Tool (SWAT) model was used to assess the impacts of potential future climate change on the hydrology of the Upper Mississippi River Basin (UMRB). Calibration and validation of SWAT were performed on a monthly basis for 1968-87 and 1988-97, respectively; R2 and Nash-Sutcliffe simulation efficiency (E) values computed for the monthly comparisons were 0.74 and 0.65 for the calibration period and 0.81 and 0.75 for the validation period. The impacts of eight 20-year (1971-90) scenarios were then analyzed, relative to a scenario baseline. A doubling of atmospheric CO2 concentrations was predicted to result in an average annual flow increase of 35 percent. An average annual flow decrease of 15 percent was estimated for a constant...
Tipo: Working or Discussion Paper Palavras-chave: Climate change; Flow; Hydrology; Simulation; Spatial patterns; Watershed; Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/18419
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Collective Action for Water Harvesting Irrigation in Lerma-Chapala Basin, Mexico AgEcon
Scott, Christopher A.; Silva-Ochoa, Paula.
Water and watersheds are difficult to separate for management purposes. Providing irrigation as a supplement to rainfall for crop production requires considerable collective action at the watershed level to mobilize labor and other resources, as well as to make decisions and implement the distribution of benefits. Small- scale water harvesting irrigation systems in Mexico have endured for centuries. They now face considerable challenges with changes in the ejido property rights over land and water, the growing importance of alternative sources of livelihoods, and increasing scarcity and competition for water within the river basins. Two case studies of water harvesting irrigation systems in the Lerma-Chapala Basin illustrate the response of communities to...
Tipo: Working or Discussion Paper Palavras-chave: Irrigation; Watershed; Water harvesting; Water; Collective action; Property rights; Mexico; Resource /Energy Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/50057
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Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins AGRIAMBI
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
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Composition and structure of the gallery forest in the Taquaruçu GrandeSub-basin, Municipality of Palmas, Tocantins State Biological Sciences
Silva, Wagner Matos da; Lolis, Solange de Fátima; Viana, Rodney Haulien Oliveira.
In the State of Tocantins, there is an abundance of water bodies, and consequently a large range of gallery forests. Despite growing awareness of the importance of these forest resources and the need to conserve them, little is known about the composition and floristic diversity of existing remnants, which still represent part of the original vegetation. The aim of this study was to review and compare the floristic composition and structure of the tree layer of the gallery forest in two microbasins of Taquaruçu Grande Sub-basin, Palmas County, Tocantins State. For phytosociological sampling, contiguous 50 plots of 10 x 10 m were set in each area, where all the individuals with trunk circumference greater than or equal to 15, at 130 cm from the ground were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tree layer; Watershed; Similarity Botânica.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28663
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Consequences of suppressing natural vegetation in drainage areas for freshwater ecosystem conservation: considerations on the new "Brazilian forest code" Acta Botanica
Pinheiro,Marcelo Henrique Ongaro; Carvalho,Lucélia Nobre; Arruda,Rafael; Guilherme,Frederico Augusto Guimarães.
The input of particulate and dissolved organic matter (POM and DOM, respectively) from terrestrial ecosystem drainage basins is an important energy and nutrient source in limnic food chains. Studies indicated that semi-deciduous seasonal forests located in drainage areas in Brazil have the potential to produce 7.5 - 10.3 Mg ha−1/year of POM. The global increase in vegetation destruction, such as forests, threatens this allochthonous resource and can have significant impacts on river and lake communities and food chains. Therefore, it is critical that exploitation and occupation protocols are updated to protect the transition areas between terrestrial and limnic ecosystems. This review highlights the existing knowledge of these ecosystem interactions and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater biodiversity; Freshwater food chains; Freshwater resources; Riparian forests; Watershed.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000200262
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Conservation of ecosystem services in high-altitude Andean wetlands: social participation in the creation of a natural protected area Ecología austral
Rubio,María Clara; Rubio,Cecilia; Salomón,Mario; Abraham,Elena.
The goal of the present work is to synthesize the process of collective construction developed to protect the high-altitude wetlands of the Blanco River basin, located in the Andes Mountains, Province of Mendoza. The participatory process arose out of an initiative of basin residents and users, and was conducted by the Integrative Committee for Creation of Potrerillos Municipal Environmental Protected Area (MEPA), composed of civil society organizations, government agencies and scientific institutions. The major pressures affecting the wetlands, identified through participatory assessment of the socio-ecosystem are: water pollution, reduction and total loss of habitat, stoppage of groundwater flows, artificial drainage, poldering of the meadow, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Community conservation strategy; Assessment; Benefciaries; Mapping; High Andes; Land use; Watershed; Land-use planning.
Ano: 2017 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000200008
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Cost and benefits of using best management practices to control non-point sources of pollution under environmental and economic uncertainty AgEcon
Rodriguez, Hector German; Popp, Jennie S. Hughes; Gbur, Edward E.; Chaubey, Indrajeet.
The economy of northwest Arkansas, including the Lincoln Lake watershed (a sub-watershed of the Illinois River), relies greatly upon livestock and poultry production. The supply of production by-products is increasingly under scrutiny as one of the potential sources of water pollution in the region. In light of the recent economic crisis, methodologies that help producers to evaluate the environmental and economic impacts of several practices before implementing them may be a cost-effective means of increasing BMP adoption. This study uses stochastic dominance techniques to evaluate, environmentally and economically, ten best management practices (BMPs) combinations to lessen water pollution in the Lincoln Lake watershed. All BMP combinations analyzed were...
Tipo: Conference Paper or Presentation Palavras-chave: Nonpoint pollution; Watershed; Best management practices; Risk analysis; Stochastic dominance; Environmental Economics and Policy; Risk and Uncertainty; Q25; Q53.
Ano: 2011 URL: http://purl.umn.edu/103344
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Cost Effectiveness of Rainwater Harvesting for Groundwater Recharge in Micro-Watersheds of Kolar District of India: The Case Study of Thotli Micro-Watershed AgEcon
Nagaraj, N.; Pradhani, Umesh; Chengappa, P.G.; Basavaraj, G.; Kanwar, Ramesh S..
This study has estimated the supply augmentation of groundwater recharge due to creation of water harvesting structures and has assessed the cost-effectiveness of rainwater harvesting for groundwater recharge on watershed basis in one of the sub-watersheds of the Kolar district, Peninsular India — a typically hard-rock area. The study is based on the primary data for the year 2008-09 collected from a sample of 90 farmers having irrigation bore-wells in the selected watershed named Thotli. The study has indicated that the annual draft of irrigation water exceeds the annual recharge, causing a negative balance. On an average, the returns per rupee investment have been found to be ` 1.80 on farm pond, ` 1.78 on recharge pit and ` 1.39 on field bund. The cost...
Tipo: Journal Article Palavras-chave: Rainwater harvesting; Economic feasibility; Groundwater recharge; Watershed; Agricultural and Food Policy; Q15; Q25.
Ano: 2011 URL: http://purl.umn.edu/118229
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Determination of ametryn herbicide by bioassay and gas chromatography-mass spectrometry in analysis of residues in drinking water. Repositório Alice
QUEIROZ, R. H. C.; LANCHOTE, V. L.; BONATO, P. S.; TOZZATO, E.; CARVALHO, D. de; GOMES, M. A.; CERDEIRA, A. L..
A simple, rapid, and quantitative bioassay method was compared to a gas chromotography/mass spectrometry (GC/MS) procedure for the analysis of ametryn in surface and groundwater. This method was based on the activity of ametryn in inhibiting the growth of the primary root and shoot of germinating lettuce, Lactuca sativa L. seed. The procedure was sensitive to 0.01 ug/l and was applicable from this concentration up to 0.6 ug/l. Initial surface sterilization of the seed selection of pregerminated seed of certain root lengths, and special equipment are not necessary. So, we concluded that the sensitivity of the bioassay method is compatible with the chromatographic method (GC-MS). However, the study of the correlation between methods suggests that the...
Tipo: Capítulo em livro científico (ALICE) Palavras-chave: Persistance; Beneficial effects; Contamination; Water samples; Method; Persistent; Movement; Watershed; Environment; Herbicides; Leaching; Monitoring; Toxicity.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/13134
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