Citas bibligráficas
Ascencios, D., (2021). Eficiencia hídrica, energética y emisiones CO2 utilizando sistemas de riego presurizado en las áreas verdes de la UNALM [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/4612
Ascencios, D., Eficiencia hídrica, energética y emisiones CO2 utilizando sistemas de riego presurizado en las áreas verdes de la UNALM []. PE: Universidad Nacional Agraria La Molina; 2021. https://hdl.handle.net/20.500.12996/4612
@phdthesis{renati/1113604,
title = "Eficiencia hídrica, energética y emisiones CO2 utilizando sistemas de riego presurizado en las áreas verdes de la UNALM",
author = "Ascencios Templo, David Ricardo",
publisher = "Universidad Nacional Agraria La Molina",
year = "2021"
}
Water and energy are finite and scarce resources, consequently, it is necessary to reduce their consumption and use it efficiently in irrigation systems. The aim of the study was to determine the water and energy efficiency, as well as the emission of CO2 in the urban green areas of UNALM, using pressurized irrigation systems. The water stress in St. Augustine grass (Stenotaphrum secundatum) was evaluated, considering a gradient of the potential evapotranspiration and the effect on the grass quality. In addition, subsurface drip irrigation was used from August 2016 to July 2017. Crop coefficients were obtained in optimal conditions for St. Augustine grass, using drainage lysimeters. Moreover, the irrigation efficiencies of the pressurized irrigation systems and the energy efficiency of the pumping system were evaluated, with constant and variable speed using variable frequency drives and the CO2 emission produced by the pressurized irrigation systems was determined. The results showed irrigation coefficients for the subsurface drip irrigation of 0.8 ETo; 0.8 ETo; 0.4 ETo and 0.6 ETo, for summer, autumn, winter, and spring respectively. Irrigation coefficients for sprinkler irrigation were 0.75 for summer and 0.6 for the other seasons. The crop coefficients for St. Augustine grass were: 0.95, 0.85, 0.52, and 0.78, for the summer, autumn, winter, and spring, respectively. The irrigation efficiency using rotors was 75%, with diffusers it was 60% and with subsurface drip, it was higher than 90%. For the current sprinkler irrigation system, the total efficiency energy of 70.30% was obtained, with a constant speed in the electric motor. In an improved situation, with the variable frequency drives in the electric motor, the total efficiency energy of 68.75% would be obtained, and emissions would decrease by 20.97 tons of CO2 /year.
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