| 微灌系统干支管经济坡降的推求 |
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| 引用本文： | 马承新. 微灌系统干支管经济坡降的推求[J]. 节水灌溉, 1989, 0(3) |
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| 作者姓名： | 马承新 |
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| 作者单位： | 山东省水利厅农田水利处 |
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| 摘 要： | 本文按照生产费用和耗能之和最小的原则,利用抛物线函数关系,对微灌系统干、支管的水力坡降进行了分析。分析结果表明:影响经济坡降的主要因素有流量、电价、系统的使用寿命、年运行时间、价格系数、以及机械效益等。最后并举例说明了该公式的应用。
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| 关 键 词： | 经济坡降 生产费用 年运行费用 |
ASCERTAINNING THE ECONOMIC SLOPE OF MAIN LINE AND LATERAL FOR MINI IRRIGATION SYSTEMS |
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| Na,Cheagxin. ASCERTAINNING THE ECONOMIC SLOPE OF MAIN LINE AND LATERAL FOR MINI IRRIGATION SYSTEMS[J]. Water Saving Irrigation, 1989, 0(3) |
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| Authors: | Na Cheagxin |
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| Abstract: | Aocording to the priciple of minimizing the sum of production cost and energy expendition this paper analyses the hydraulic slope of main lines and laterals of mini-irrigation systems by the parabola method. The result of analyses indicates that the main factors influencing economic slope are flow rate, energy cost, service life of the system, yearly running time, cost coefficent and machinery benefit. Finally, illustrations are given to show the use of the formula. |
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| Keywords: | economic slope proeuction cost yearly running cost. |
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