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RISS 인기검색어
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- 저자 : 가마자신토빈센트필 ( Jacinto Vicente Filipe Gama ) (검색결과 1 건)
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가마자신토빈센트필 ( Jacinto Vicente Filipe Gama ),홍성구 ( Seonggu Hong ) 한국농공학회 2020 한국농공학회 학술대회초록집 Vol.2020 No.-
Inadequate information about sprinklers especially in terms of coefficient uniformity and distribution uniformity is usually not given by the manufacturers, thus making an engineer difficult to correctly select a sprinkler. The manufacturers mention the sprinkler specifications (pressures for each nozzle with a radius of throwing wetted, discharge volume, and precipitation for each nozzle). The main goal of this study is to evaluate water distribution uniformity, coefficient uniformity, and water application rate surrounding a sprinkler on the single sprinkler. The single sprinkler Rain bird 15 series HE-VAN was evaluated under outdoor experimental conditions by measuring water depth. The pressure is one of the most important factors that strongly affect irrigation uniformity and efficiency in a sprinkler irrigation system. The sprinklers were operated under different pressure and nozzle angle as recommended by the manufacture. The Measurements of water depth using a catch can for sprinkler surroundings to the wetted radius have been done for different respective pressures (1bar, 1.4bar, 1.7 bar, and 2.1 bar) each within 15 minutes. The results show that the change in the distribution coefficient, the coefficient of uniformity change also. The lowest and highest coefficient uniformity (CU) and (DU) on nozzle 360°for the respecting pressure 1.7 bar & 1.4 bar is 22%, 52% of CU, and 70%,34% respectively. For the water application rate show that on 360° and 270° high water dept near to sprinkler and decreased sharply with the increasing distance from the sprinkler, while on 180° and 90°, high water dept increase in 1.3 meters from the sprinkler and then decrease at end of wetted area. Weather influence, causing low efficiency of distribution uniformity and coefficient uniformity. By this individual sprinkler evaluation, the irrigation system uniformity can be an input for an engineer to ensuring proper spacing is used in design and installation to meet the maximum irrigation efficiency.
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