0000000000117315

AUTHOR

Juan Manzano Juarez

showing 2 related works from this author

Analysis of Geometrical Relationships and Friction Losses in Small-Diameter Lay-Flat Polyethylene Pipes

2016

[EN] The use of lay-flat polyethylene pipes to irrigate horticultural crops has been receiving widespread attention in the last decade, due to the significant improvements in their hydraulic performance, their potentially high application efficiency, and their limited installation costs. However, even if hydraulic design procedures for conventional microirrigation systems are fairly well established, there is still the need to know how different pipe-wall thicknesses of lay-flat pipes can affect the pipe geometry under different operating pressures as well as the related consequences on friction losses. This paper, after comparing two different procedures (caliper and photographic) to asses…

Friction factorSmall diameterHydraulic engineeringeducation0208 environmental biotechnologyHorticultural cropsLay-flat polyethylene pipe02 engineering and technologychemistry.chemical_compoundFriction lossesGeotechnical engineeringWater Science and TechnologyCivil and Structural EngineeringLay-flat polyethylene pipes; Pipe geometry; Hydraulic radius; Friction losses; Friction factorFriction losseHydraulic radiufood and beverages04 agricultural and veterinary sciencesPolyethyleneAgricultural and Biological Sciences (miscellaneous)020801 environmental engineeringPipe geometryFriction factorHydraulic radiuschemistry040103 agronomy & agricultureINGENIERIA AGROFORESTAL0401 agriculture forestry and fisheriesLay-flat polyethylene pipesGeologyJournal of Irrigation and Drainage Engineering
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Improvement of FAO-56 Model to Estimate Transpiration Fluxes of Drought Tolerant Crops under Soil Water Deficit: Application for Olive Groves

2014

[EN] Agro-hydrological models are considered an economic and simple tool for quantifying crop water requirements. In the last two decades, agro-hydrological physically based models have been developed to simulate mass and energy exchange processes in the soil-plant-atmosphere system. Although very reliable, because of the high number of required variables, simplified models have been proposed to quantify crop water consumes. The main aim of this paper is to propose an amendment of the Food and Agricultural Organization (FAO) of the United Nations FAO-56 spreadsheet program to introduce a more realistic shape of the stress function, valid for mature olive orchards (Olea europaea L.). The mod…

Hydrological modellingDrought toleranceAmendmentFAO-56 agro-hydrological model Water stress function Water uptake ability Table olive orchards Midday stem water potential Relative transpirationMidday stem water potentialCropSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliRelative transpiration.Energy exchangeWater Science and TechnologyCivil and Structural EngineeringTranspirationWater stress functionHydrologybusiness.industryRelative transpirationFAO-56 agro-hydrological modelTable olive orchardsAgricultural and Biological Sciences (miscellaneous)Water uptake abilityRelative transpiration; Midday stem water potential; Table olive orchards; FAO-56 agro-hydrological modelAgricultureSoil waterEnvironmental scienceINGENIERIA AGROFORESTALbusiness
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