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| Study on the Emission Uniformity for the Emitter under the Condition of Farmland Micro-terrain Action |
| ZHU De-lan, WU Pu-te, ZHANG Qin-feng, NIU Wen-quan, YANG Wen-hui |
| ISWC, Chinese Academy of Sciences and Ministry of Water Resources; Northwest Sci-tech University of A &F; National Engine Research Center of Water Saving-irrigation for Yang-Ling, Shanxi 712100, China, Water Conservancy Department of Baoji, Baoji 721300, China; Jin Tai Area Hydraulic Office in Baoji, Baoji 721300, China |
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Abstract The calculation formulas of the dripper flow variation rate, flow deviation coefficient and the emission uniformity for the emitter were analyzed in drip irrigation system. They are affected by farmland micro-terrain deviation, hydraulic deviation for the emitter and manufacture deviation for the emitter. The micro-terrain and manufacture coefficient, which accorded with the random of positive state distribution are imitated by computer program. The dripper flow variation rate, flow deviation coefficient and the emission uniformity for the emitter are calculated by using computer program under the four conditions. And the formula of the emission uniformity for the emitter and the relation of various uniformity parameters are proposed by statistic analysis of 500 groups data, which could be used to the hydraulic calculation of the drip system designs.
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Received: 08 August 2013
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| [1] Bralts V F,Wu I-pai,Gitlin H M.Manufacturing Variation and Drip Irrigation Uniformity[J].ASAE,1986,26(6):1659-1664[2] Bralts V F,Edwards D M.Field Evaluation Submain Units[J].ASAE,1986,26(6):1659-1664[3] 郑耀泉,宁堆虎.滴头制造偏差的模拟与滴灌系统随机设计方法的研究[J].水利学报,1991(7):1-6[4] 郑耀泉,陈昌渠.微灌均匀度参数之间的关系及其应用[J].灌溉排水,1994,13(2):7-10[5] 王留运.微灌灌水器制造偏差系数的计算方法与研究[J].喷灌技术,1993,12(2):6-11[6] 张国祥.廉价节能高效滴灌系统研究报告[R].杨凌:国家节水灌溉杨凌工程技术研究中心,2002 |
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