【摘要】 本文分析了研究节水灌溉技术特性参数的必要性，证明了正态分布下均匀系数 Ｃｕ 与变差系数 Ｃｖ 的关系，分析了采用图形效率 Ｅｐ 表示灌水均匀性的优点，对生产有一定的指导作用。更多还原

【Abstract】 This paper analysises the necessity to study distribution characteristic parameters of sprinkler irrigation and micro-irrigation. The relation of distribution coefficient ( C u ) and deviation coefficient ( C v ) in normal distribution are proved and the advantages of using pattern efficiency ( E p ) in practice are analysed, which have certain effect to practice.\;更多还原