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| Registros recuperados: 147 | |
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| Gordon, Line; Stockholm University; line@system.ecology.su.se; Folke, Carl; Stockholm University; calle@system.ecology.su.se; Falkenmark, Malin; Swedish Natural Science Research Council;; Engwall, Maria; ;. |
| Global freshwater assessments have not addressed the linkages among water vapor flows, agricultural food production, and terrestrial ecosystem services. We perform the first bottom-up estimate of continental water vapor flows, subdivided into the major terrestrial biomes, and arrive at a total continental water vapor flow of 70,000 km3/yr (ranging from 56,000 to 84,000 km3/yr). Of this flow, 90% is attributed to forests, including woodlands (40,000 km3/yr), wetlands (1400 km3/yr), grasslands (15,100 km3/yr), and croplands (6800 km3/yr). These terrestrial biomes sustain society with essential welfare-supporting ecosystem services, including food production. By analyzing the freshwater requirements of an increasing demand for food in the year 2025, we... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Catchment management; Ecohydrological landscape; Evapotranspiration; Food production; Freshwater management; Global freshwater assessment; Resilience; Terrestrial ecosystem services; Trade-offs; Water use efficiency; Water vapor flows.. |
| Ano: 1999 |
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| Tarigan, Suria; Soil and Natural Resources Management, Bogor Agricultural University, Indonesia; surya.tarigan@yahoo.com; Agusta, Herdhata; Agronomy and Horticulture, Bogor Agricultural University, Indonesia; agusta@gmx.at; Gunawan, Dodo; Center of Climate Change and Air Quality, Agency for Meteorology, Climatology and Geophysics, Jakarta, Indonesia; dodogunawan88@gmail.com; Hein, Jonas; Department for Environmental Policy and Natural Resource Management, German Development Institute, Bonn, Germany; Jonas.Hein@die-gdi.de; Hendrayanto, ; Forest Management Department, Faculty of Forestry, Bogor Agricultural University, Indonesia; hendrayanto@gmail.com. |
| Conversions of natural ecosystems, e.g., from rain forests to managed plantations, result in significant changes in the hydrological cycle including periodic water scarcity. In Indonesia, large areas of forest were lost and extensive oil palm plantations were established over the last decades. We conducted a combined social and environmental study in a region of recent land-use change, the Jambi Province on Sumatra. The objective was to derive complementary lines of arguments to provide balanced insights into environmental perceptions and eco-hydrological processes accompanying land-use change. Interviews with villagers highlighted concerns regarding decreasing water levels in wells during dry periods and increasing fluctuations in stream flow between... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Eco-hydrology; Environmental perception; Erosion; Evapotranspiration; Forest; Land-use change; Runoff; Rural water supply; Streamflow; Transpiration. |
| Ano: 2016 |
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| Uliana,Eduardo M.; Silva,Demetrius D. da; Silva,José G. F. da; Fraga,Micael de S.; Lisboa,Luana. |
| ABSTRACT This study aimed at testing the fit of continuous probability distributions to a daily reference evapotranspiration dataset (ET0) at a 75% probability level for designing of irrigation systems. Reference evapotranspiration was estimated by the Penman-Monteith method (FAO-56-PM) for eight locations, within the state of Espírito Santo (Brazil), where there are automatic gauge stations. The assessed probability distributions were beta, gamma, generalized extreme value (GEV), generalized logistic (GLO), generalized normal (GN), Gumbel (G), normal (N), Pearson type 3 (P3), Weibull (W), two- and three-parameter lognormal (LN2 and LN3). The fitting of the probability distributions to the ET0 daily dataset was checked by the Kolmogorov-Smirnov's test.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Probability; Irrigation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200257 |
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| Gondim,Rubens S.; Evangelista,Sílvio R. M.; Maia,Aline de H. N.; Duarte,Aryberg de S.. |
| ABSTRACT The aim of this study was to evaluate the impacts of climate change on irrigation water demand of melon plants grown in Jaguaribe-Apodi Irrigation District (DIJA), which is located between the states of Ceará and Rio Grande do Norte, in Northeastern Brazil. Future scenarios were developed using the Eta-CPTEC/HadCM3 climate change projections, after being submitted to downscaling method. We used a set of climate data from the same model for the period of 1961 through 1990, and further projections after bias correction. Local geographic coordinates were interpolated using GIS techniques. Reference evapotranspiration (ETo) was estimated from the monthly minimum and maximum mean temperatures, using a limited data method. The rainfall, temperature,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; GIS techniques; Irrigation; Cucumis melo L. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300591 |
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| Alves Júnior,José; Folegatti,Marcos V.; Silva,Cláudio R. da; Silva,Tonny J. A. da; Evangelista,Adão W. P.. |
| The aim of this study was to evaluate the effect of different irrigation levels on canopy and root growth, productivity, and fruit quality of young Tahiti acid lime trees. The experiment was installed in Piracicaba, Brazil in a 1.0-ha orchard plot with Tahiti acid lime trees, grafted on Swingle citrumelo rootstock and carried out from August of 2002 to May 2005. Each treatment was assigned to a drip irrigation level, based on ETc as follows: T1) non-irrigated, T2) 25%, T3) 50%, T4) 75% and T5) 100% of ETc determined by weighing lysimeter presented in the orchard plot. Trunk diameter and tree height were evaluated monthly. The roots were evaluated when the trees were 30 and 48 months old. The yield and fruit quality was evaluated in 2004 and 2005. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation scheduling; Citrus latifolia Tan.; Evapotranspiration; Root distribution. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000200010 |
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| Oliveira,Gabriel Q. de; Lopes,Adriano S.; Jung,Leandro H.; Rego,Norton H.; Oliveira,Jean C. L. de. |
| The eucalyptus offers several advantages compared to other forestry species and, by using the irrigation can increase productivity and decrease production time. The objective of the present study was to evaluate two hybrid eucalyptus (Grancam and Urograndis), no irrigation, dripping and micro sprinkler irrigated at 90, 120, 150 and 180 days after transplanting (DAT). The experiment was conducted at the experimental irrigation area in the State University of Mato Grosso do Sul, in the municipality of Aquidauna - State of MS, Brazil. The experimental design was randomized blocks, split plot with four blocks and two replications within each block, and the plots were composed by irrigation treatments (dripping, micro sprinkler irrigate and dry) and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp.; Sprayer; Dripping irrigation; Evapotranspiration. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600003 |
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| Silva,Edinéia F. da; Jadoski,Sidnei O.; Martinkoski,Lais. |
| ABSTRACT Potato (Solanum tuberosum L.) cultivation has a high demand for management and treatments during the vegetative cycle in the field. Among these requirements, water management is a limiting factor of tuber productivity and quality. This study aimed to determine the most appropriate soil water depletion depth for irrigation management in potato crops of Ágata cultivar, under the edaphoclimatic conditions of Guarapuava-PR, considering its influence on crop vegetative development. The study was conducted using four water depletion depths in the soil (12, 24, 36, and 48 mm). The different irrigation treatments promoted differences in shoot dry mass, leaf area index (LAI), number of tubers per plant, and productivity. The highest yield was observed for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water; Potato cultivars; Evapotranspiration. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400434 |
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| Silva,Jaqueline A. da; Rezende,Maiara K. A.; Flumignan,Danilton L.. |
| ABSTRACT Plant yield is strongly influenced by the amount of water used by it. In this sense, yield response factor (Ky) allows evaluating the decrease in yield as a function of the evapotranspiration that occurs, which may be an important tool for harvest forecasting. Therefore, this study aimed to determine Ky for winter corn crop grown in the region of Dourados, MS, Brazil. The yield function analysis based on the water factor, which requires actual (Ya) and maximum (Ym) yield data, as well as actual (ETa) and maximum (ETm) evapotranspiration, was used to adjust Ky. Ym was assumed to be 8,820 kg ha−1, while Ya was obtained for each season from the database SIDRA from IBGE. ETm and ETa were estimated by sequential daily water balance, considering four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Water deficit; Evapotranspiration; Zea mays. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500573 |
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| Gotardo,Jackeline T.; Rodrigues,Lineu N.; Gomes,Benedito M.. |
| ABSTRACT This study aimed to compare methods for estimating reference evapotranspiration using an experimental basin in the Brazilian Cerrado, for water management purposes. For that, we estimated daily reference evapotranspiration over a certain period (time series between 1982 and 2012) through different empirical methods. These methods consisted of Blaney-Criddle (BC), Hargreaves & Samani (HS), ASCE Penman-Monteith (ASCE- PM), Penman (1948/1963) (PO), Priestley-Taylor (PT), which were all compared to the standard Penman-Monteith FAO-56 (PM-FAO56). Based on statistics, ASCE- PM, P and BC methods should be recommended for cerrado areas, either in rainy or dry seasons. After these, the PT also stood out. Among the less complex methods, based on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Methods; Penman-Monteith FAO-56. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601016 |
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| Barbieri,João D.; Dallacort,Rivanildo; Faria Junior,Cleonir A.; Freitas,Paulo S. L. de; Carvalho,Marco A. C. de. |
| ABSTRACT: The objective of this study was to define the best irrigation level in a sprinkler system, submitted to nitrogen doses in covering in the municipality of Tangará da Serra - MT, for two cultivars of peanut (Arachis hypogaea L.). The experiment was carried out in the experimental field of the State University of Mato Grosso (UNEMAT), located geographically in latitude 14°39′S; Longitude 57°25′W, at 440 meters of altitude. The climate is classified as tropical humid megathermal (Aw), with annual average rainfall of 1,830 mm and average temperature of the air 24.4°C. The soil is classified as Dystroferric Red Latosol. The experimental design was in randomized blocks where 4 levels (30, 70, 110 and 150% of the reference evapotranspiration, ET0) were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Correlation; Productivity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601126 |
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| TEODORO,IÊDO; DANTAS NETO,JOSÉ; HOLANDA,LUCAS A. DE; SAMPAIO NETO,GIVALDO D.; SOUZA,JOSÉ L. DE; BARBOSA,GERALDO V. DE S.; LYRA,GUILHERME B.. |
| The objective of this study was to evaluate the meteorological variables, water deficiency, growth, and agro-industrial yield of sugarcane varieties: RB72454, RB863129, RB867515, RB92579, RB93509, RB931003, RB951541, and RB971755, in rainfed crop in two harvests in the Rio Largo-AL region. The meteorological variables were obtained in an automatic station and water balance was done by Thornthwaite & Mather method. During the study period, the air temperature ranged from 16.6 to 35.9 ºC. In the first production cycle rained 1,806 mm and the crop evapotranspiration was 1,775 mm. In the second cycle, the rainfall totaled 1,632 mm and the crop evapotranspiration was 1,290 mm. The average water excess of two production cycles was 689 mm and the water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air temperature; Rain; Evapotranspiration; Canopy height. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100076 |
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| GUERRA, A. F.; RODRIGUES, G. C.; ROCHA, O. C.; EVANGELISTA, W.. |
| RESUMO: Este trabalho objetivou determinar a necessidade hídrica e os coeficientes de cultura em feijão, trigo, milho e arroz irrigados por aspersão do tipo pivô-central, visando ao manejo da água com tanque classe A. O feijão e o trigo foram cultivados na época da seca com plena irrigação enquanto o milho e o arroz, no período das chuvas, com suplementação hídrica. A evapotranspiração real foi medida por lisímetro de pesagens, com 3 m de comprimemento, 2 m de largura e 1,2 m de altura, instalado na parte central da área irrigada. Os dados de evaporação do tanque Classe A foram medidos em uma estação meteorológica localizada a 150 m da área experimental. Os resultados da evapotranspiração e dos coeficientes de cultura foram 30% superiores aos sugeridos na... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Cultura anual; Coeficiente de cultura; Grain.; Cerrado; Evapotranspiração; Grão; Irrigação por Aspersão; Irrigação; Manejo de Água.; Annuals; Crop coefficient; Evapotranspiration; Irrigation; Sprinkler irrigation; Water management.. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568970 |
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| Registros recuperados: 147 | |
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