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  • Pereira, Silvio B.  (4)
  • 1
    Online Resource
    Online Resource
    Arugula production as a function of irrigation depths and potassium fertilization
    FapUNIFESP (SciELO) ; 2017
    In:  Revista Brasileira de Engenharia Agrícola e Ambiental Vol. 21, No. 3 ( 2017-03), p. 197-202
    Details
    In: Revista Brasileira de Engenharia Agrícola e Ambiental, FapUNIFESP (SciELO), Vol. 21, No. 3 ( 2017-03), p. 197-202
    Abstract: RESUMO A rúcula é uma hortaliça que tem ganhado cada vez mais destaque na alimentação, sendo rica em potássio, enxofre, ferro, ômega-3 e vitaminas A e C. É uma cultura que possui, como fatores limitantes para sua produção, a disponibilidade de água e de nutrientes, contexto no qual se objetivou, neste trabalho, avaliar a produção da rúcula submetida a diferentes lâminas de irrigação e doses de adubação potássica. O experimento foi conduzido entre agosto e setembro de 2015. O delineamento experimental utilizado foi o inteiramente casualizado, no esquema de parcelas subdivididas. As parcelas foram representadas pelas lâminas de irrigação L1, L2, L3 e L4 (25, 50, 75 e 100% da evapotranspiração da cultura, respectivamente), e as subparcelas pelas doses de potássio K1 e K2 (200 e 400 kg ha-1, respectivamente). Embora a maior produtividade tenha sido obtida com a maior lâmina de irrigação e maior dose de potássio, recomenda-se o cultivo da rúcula com a menor lâmina e menor dose, haja vista o maior valor de eficiência do uso da água para este tratamento.
    Type of Medium: Online Resource
    ISSN: 1415-4366
    URL: Article
    DOI: 10.1590/1807-1929/agriambi.v21n3p197-202
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2017
    detail.hit.zdb_id: 2164420-2
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  • 2
    Online Resource
    Online Resource
    Evaporação líquida no lago de Sobradinho e impactos no escoamento devido à construção do reservatório
    FapUNIFESP (SciELO) ; 2009
    In:  Revista Brasileira de Engenharia Agrícola e Ambiental Vol. 13, No. 3 ( 2009-06), p. 346-352
    Details
    In: Revista Brasileira de Engenharia Agrícola e Ambiental, FapUNIFESP (SciELO), Vol. 13, No. 3 ( 2009-06), p. 346-352
    Abstract: Losses of water by evaporation in regulatory reservoirs are one of the problems that exist in water resources management, the reliable estimates of evaporation in the reservoirs becoming essential not only in the planning and administration of the water resources but also in studies of environmental impact. The objective of this paper was to estimate the net evaporation in the Sobradinho dam through the Class A tank methodology and the Linacre (1993), Kohler et al. (1955) and CRLE models, as well as to verify the impacts on the flow conditions due to the construction of the reservoir. The results showed that: the construction of the Sobradinho reservoir, associated to the other activities developed in the basin, caused a reduction of the average flow of 163 m³ s-1; the values obtained by the Kohler et al. (1955) model can be used as a reference base to estimate the annual average evaporation in the Sobradinho dam; the coefficient of Class A tank that represented better the seasonal variation of evaporation in the Sobradinho dam was 0.57 and the annual average flow corresponding to net evaporation of Sobradinho reservoir was 132 m³ s-1.
    Type of Medium: Online Resource
    ISSN: 1415-4366
    URL: Article
    DOI: 10.1590/S1415-43662009000300018
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2009
    detail.hit.zdb_id: 2164420-2
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  • 3
    Online Resource
    Online Resource
    Estudo do comportamento hidrológico do Rio São Francisco e seus principais afluentes
    FapUNIFESP (SciELO) ; 2007
    In:  Revista Brasileira de Engenharia Agrícola e Ambiental Vol. 11, No. 6 ( 2007-12), p. 615-622
    Details
    In: Revista Brasileira de Engenharia Agrícola e Ambiental, FapUNIFESP (SciELO), Vol. 11, No. 6 ( 2007-12), p. 615-622
    Abstract: The São Francisco Basin has 36 major tributaries, of which 19 are perennial. The areas of drainage of these tributaries, except for the Raverde Livarde, are located in the area of the basin not included in the drought region, representing 50% of the total area of the basin. In this study the hydrological behavior of the São Francisco River and its main tributaries was analyzed in relation to the annual data of mean precipitation, mean specific flow and outflow coefficient. The obtained results lead the following conclusions: the studied hydrological variables presented mean values in the second period superior to those of the first one; the studied tributaries that represent 46.3% of the basin area contribute 81% of its flow for the period without the influence of the reservoir accumulation; the sub-basins that present the largest contributions for the formation of the flow of São Francisco River are the ones of the Rivers Paracatu, Grande and Velhas.
    Type of Medium: Online Resource
    ISSN: 1415-4366
    URL: Article
    DOI: 10.1590/S1415-43662007000600010
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2007
    detail.hit.zdb_id: 2164420-2
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  • 4
    Online Resource
    Online Resource
    Precipitação média anual e vazão específica média de longa duração, na Bacia do São Francisco
    FapUNIFESP (SciELO) ; 2004
    In:  Revista Brasileira de Engenharia Agrícola e Ambiental Vol. 8, No. 2-3 ( 2004-12), p. 247-253
    Details
    In: Revista Brasileira de Engenharia Agrícola e Ambiental, FapUNIFESP (SciELO), Vol. 8, No. 2-3 ( 2004-12), p. 247-253
    Abstract: The São Francisco River drains an area of 640,000 km² and is responsible for the sustainability of the 503 municipalities in the basin where 14 million people live. This study was undertaken to investigate the mean precipitation and the specific yield discharge in the São Francisco Basin. The analysis was made considering 178 rain-gauge stations and 77 stations to measure stream flow. The specific yield discharge was obtained by dividing the mean annual discharge by the drainage area upstream from the station, and the mean precipitation in the upstream area from each station was obtained by the Thiessen polygon method. The results indicated that the mean precipitation decreased from the Upper São Francisco to Lower São Francisco, and the specific yield discharge decreases along the river, the maximum specific discharge was 22.6 L s-1 km-2, in Iguatama, the first station in the river, and the lowest stream flow was 4.2 L s-1 km-2, in Traipu, the last station in the São Francisco river.
    Type of Medium: Online Resource
    ISSN: 1415-4366
    URL: Article
    DOI: 10.1590/S1415-43662004000200013
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2004
    detail.hit.zdb_id: 2164420-2
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